This totally unique variety pumps out bunches of pure white flowers that have graceful twisted petals with a striking raspberry red edge. The plants put on a memorable show in the garden when combined with Cannas or Colocasias, and make great cut flowers as well. Top-size clumps.
|Plant Lighting:||Full Sun|
|Season Color:||Mid-Summer to Fall|
|Max Height (feet):||36-48|
Customer photo by Pam of Harder, Idaho.
Bulbs are the epitome of nature's talent for packaging, containing within themselves all of the essentials they need to grow and flower. Some don’t even require soil—just witness a paperwhite narcissus blooming happily indoors in nothing more than a bowl of marble chips. But it is outdoors that bulbs really shine. Most are hardy and undemanding; some will even naturalize and provide color year after year. Whether for borders, cutting gardens, containers, rock gardens or naturalistic plantings, bulbs deserve a place in every garden scheme.
Generally, bulbs are divided into two categories: the spring-flowering types, which are typically planted in the fall; and the summer-flowering bulbs, usually planted in the spring. Lilies (Asiatics, Orientals, tigers) are an exception to this rule; they can be planted in either spring or fall for summer blooms.
Another crucial consideration is whether the bulb is hardy or tender. Hardy bulbs (daffodil, crocus, hyacinth, tulip, lily, etc.) will survive the winter right in the ground to bloom again the following year. Tender bulbs (gladiolus, canna, dahlia, etc.) will also flower year after year, but in cold climates they must be dug up or "lifted" in the fall, stored indoors over the winter, then replanted the following spring.
A naturalized planting is one of the most popular uses for bulbs in the landscape. Instead of planting the bulbs in a formal bed or border, you scatter them in irregular groupings across an area of lawn or meadow, or at a woodland edge. For the most natural effect, try not to plant bulbs in straight lines or discernible patterns.
Naturalizing bulbs in your lawn works well with the smaller, daintier flowers like crocuses, puschkinia, squill (Scilla), grape-hyacinth (Muscari), or snowdrops (Galanthus). These bulbs flower early in the season and their foliage dies back fairly quickly. If you plant such bulbs in a lawn, don't mow until the foliage has yellowed and died back. At this point, the plant will have stored all the food it needs in the underground bulb to produce next year's bloom.
Most bulbs appreciate well-drained soil and sunlight. Keep in mind, however, that bulbs that flower early in the spring will have bloomed and faded long before deciduous shrubs and trees have begun to leaf out. So treat think of spring-blooming bulbs much like spring wildflowers. A fairly open woodland setting or orchard makes an ideal setting, particularly for long-stemmed showy bulbs like daffodils and early tulips, which can be seen and admired even at a distance.
Some bulbs need to be divided. For example, daffodils multiply enough to form dense clumps, which compromises the flowers. Dig after flowering (while you can still find them), divide the clumps, and replant immediately or store until fall.
For all bulbs, including larger daffodils and tulips, don't remove or mow over the spent foliage until it has withered naturally. For this reason, it's best not to plant these long-standing bulbs in a lawn or other formal area, where the dying foliage can cause an unsightly mess. Try planting these bulbs in a field or meadow, or somewhere else that you only mow once or twice a year. Or plant them at the base of deciduous shrubs or in mixed beds or borders where later-blooming plants will draw attention from the spent foliage.
Nearly all hardy, spring-flowering bulbs require a period of "chilling" or cold dormancy before they will begin to grow and bloom. For gardeners in most regions of North America, providing this cold treatment is easy. Simply planting the bulbs in the fall and leaving them alone over the winter provides plenty of cold treatment. Just make sure to select bulbs that are hardy in your growing zone.
However, people who live in very mild winter regions (Zones 9 and 10) must select their bulbs very carefully. Daffodils should be planted in December or January (the coldest time of the year), but other hardy bulbs, such as tulips, crocuses, and hyacinths, may require special treatment in mild-winter areas. Gardeners in these regions of the country should select from among the many varieties that are rated best in warm spring and summer conditions.
Many tulips will grow well as annuals in the South if the bulbs are prechilled. Other good bulbs for warm climates include crocuses, hyacinths, lilies, muscari (grape hyacinth), colchicum (autumn crocus), and alliums (ornamental onions).
The easiest way to prechill bulbs is to store them in the refrigerator, where temperatures can be easily maintained at 40 to 45 degrees F. Store them in breathable mesh bags, like the ones they are often sold in at garden centers. Then, when they have chilled for the requisite number of weeks, simply remove the bulbs from the refrigerator and plant them either outdoors in the ground or in containers.
If you have enough space in the refrigerator, you can even plant bulbs right in their containers and remove the whole pot at the end of the chilling period. Either way, place containers of bulbs that you're forcing into a warm, sunny spot and then sit back and wait for the bulbs to send up their green leaves. After their blooming period is over, you can continue to water the pots, letting the foliage die down naturally, then replant the whole mass of bulbs in the outdoor garden.
The most popular bulb for winter forcing is undoubtedly the paperwhite narcissus, which requires no period of prechilling before it will blossom. However, you can also add variety and color to your winter or early spring displays by prechilling many other types of bulbs, then forcing them in containers for indoor bloom.
It's common for florists to sell containers of forced bulbs that are all of one type, such as dark purple or pink tulips. This makes a smashing display, but you can also be creative by forcing several kinds of bulbs of different colors or even different species to make a mixed display.
Unless you're using a large container or you have a good eye for natural design, it's best to experiment with only a couple of types of bulbs in each pot. Plant bulbs that grow to roughly the same height and whose flowers will complement each other in form and color (pink alliums and white Dutch crocuses, for instance).
Pots sold for forcing bulbs tend to have no holes in the bottom, because many people grow paperwhite narcissus in a medium of small stones instead of soil, and so drainage is not an issue. It is possible to grow other bulbs this way as well, but keep in mind that you probably won't be able to replant them outdoors after they have blossomed unless you grow them in soil. When forcing bulbs in potting soil, make sure the container has drainage holes in its bottom and that you place a dish underneath it to catch the excess water, as with any other houseplant.
Although tulips are technically considered perennials, many gardeners find that their bulbs are relatively short-lived and begin to decline over two or three years, producing smaller flowers and eventually dying out altogether. Unless your climate and growing conditions are ideal (hot, dry summers, cold winters, and well-drained soil), it can be difficult to coax some varieties of tulips into making a long-term commitment to your garden.
However, there are other types that, when given a little special care, will flower repeatedly and actually increase in size and beauty. These varieties are commonly known as "perennial tulips." One note: When buying Darwin hybrids, keep in mind that the ones with deep color will naturalize better than those with pastel colors.
To create the best conditions for perennial tulips, top-dress the planting bed with well-rotted cow manure, or add a slow-release fertilizer in the fall (9-9-6 or lower profile). After the flowers have finished blooming in the spring, deadhead the spent blossoms and allow the foliage to mature and wither naturally, so the bulbs can gather energy for next year's bloom.
Lilies are no more difficult to grow than other hardy bulbs, so long as you keep in mind a few of their important differences.
Plant lilies as soon as you get them, either in the fall or the spring. Because the bulbs lack the papery covering (known as a "tunic") that is common to other hardy bulbs, they can dry out quickly in storage.
Even more than other bulbs, lilies demand well drained soil. Dig the spot where you plan to plant lilies to a depth of at least 12 inches, remove rocks and add organic matter such as leaf mold or peat moss to improve both the soil's structure and drainage. Like other bulbs, lilies appreciate a little bone meal scratched in at the bottom of the planting hole, but do not really require other fertilizers at planting time. Instead, wait until the bulbs send up green leaves and then sprinkle a complete organic fertilizer around the plant and water it in.
Spread an organic mulch around lilies to help keep the soil moist and cool; use compost, well-rotted manure, or a longer-lasting mulch, such as wood chips or cocoa shells. As with other perennials, cover the bed over the winter with straw and/or evergreen boughs to help protect the bulbs from alternate freeze/thaw cycles.
During the flowering season, remove spent blooms, but try not to cut off more than a third of the stem, which can reduce the plant's vigor and longevity. This can be difficult to follow if you're cutting stems for indoor arrangements. So consider growing some lilies in perennial beds or borders, and others in a designated cutting garden.
Tender bulbs tend to belong to the summer-flowering group and include such popular garden specimens as dahlia, gladiolus, tuberous begonia, canna and calla lily (Zantedeschia).
Technically, these are not "true bulbs," because they don't contain a tiny flower and stalk inside of them. Instead, the plants grow from bulblike structures known as corms (gladiolus), tubers (dahlia, caladium), and rhizomes (canna). However, they are just as dependable as true bulbs and can be grown in much the same way.
These exotic summer-blooming bulbs can be integrated into the perennial garden, but because they are so popular for arrangements, they're often planted right in the vegetable garden or in a special cutting garden. Plant tender bulbs about the same time as beans and other crops, after the last frost date in spring. Then, around the first fall frosts, when the garden's tender crops are winding down, dig up the bulbs and store them away for the winter.
These tender bulbs vary in hardiness, and it's impossible to give general growing instructions for all of them; different plants have distinct preferences about light, and soil structure and fertility.
Gardeners living in Zone 8 or warmer regions can successfully overwinter cannas, callas and other types. However, by far the most popular way to grow these exotic tropical and subtropical natives is to dig up the plants around the time of the first fall frosts, allow the bulbs to dry for a short period, and then store them either in paper or mesh bags or placed in a shallow pan or box and covered with dry peat moss. Ideal storage conditions are dry, dark, and cool, around 40 to 50 degrees F.
* Taylor's Guide to Bulbs, Barbara W. Ellis (Houghton Mifflin, 2001).
* Bulbs: Four Seasons of Beautiful Blooms, Lewis and Nancy Hill (Storey, 1994).
* Daffodils for American Gardens, Brent and Becky Heath (Elliott & Clark, 1995).
* John E. Bryan on Bulbs, John E. Bryan (Macmillan, 1994).
* The Random House Book of Bulbs, Roger Phillips and Martyn Rix (Random House, 1989).
Skilled designers combine plants and "hardscape" (stone, fencing, lighting and decorations), to create a beautiful garden.
Experienced gardeners have no problem deciding when to plant their peas, how deep to put their tulip bulbs, or how much to water their geraniums. But when it comes to garden design, even the most seasoned gardeners begin to sweat. We can spend weeks trying to find the perfect spot for a new shrub; spend an entire winter sketching plans for a new perennial garden; and agonize for years about how to reconfigure the front walk. Why do we find these decisions so paralyzing?
One reason may be that garden design is perceived as the work of experts: landscape architects, landscape designers, garden designers, and landscape contractors. Yet some of the most beautiful gardens in the world were not designed by experts. Sissinghurst, the home and gardens of Vita Sackville-West and Harold Nicolson, is a perfect example. So, too, are the gardens of Tasha Tudor and Thomas Jefferson. These gardens are the result of an attentive eye, a sensitive hand, and many years of experimentation—skills that are not the exclusive property of design professionals. Our goal in this article is to help you overcome the garden design jitters, and give you the confidence to finally remove that hedge of overgrown yews, install a flagstone path, or decide where to put a water garden.
Some gardeners wouldn't dream of planting anything without having a comprehensive design and planting plan for their entire yard. Others don't think about "designing" their gardens until several years down the road. And still other gardeners never develop a long-range or a short-range plan. They do their planning in the moment, poised with a shovel and a couple of homeless plants.
Which approach is right for you? It depends entirely on who you are and what you are comfortable with. If you have the confidence to forge ahead and follow your intuition, do so! If you feel the need to get some professional advice, then that's the best alternative for you. Both approaches are equally valid.
It is good to remember that there is no ultimate garden design for your property. There are as many different designs as there are gardeners. And even if you had a detailed plan that you executed perfectly, tomorrow would bring a new interest, a new challenge, and a whole new set of design decisions. The trees will mature and turn your sunny meadow into a shady glade. The weeping cherry that anchored your spring bulb garden will die and need to be replaced. You will tire of the cottage garden and develop a passion for dwarf conifers. In garden design there are no "right" decisions. What you have is a delightful (though sometimes unnerving) opportunity to express yourself. The hardest part may be trusting your own intuition, and allowing yourself to experiment as you evolve your own unique garden design.
One of the most valuable design tools is a site plan, or bird's-eye view of your yard. Seeing your garden on paper makes it much easier to identify underlying design elements such as traffic patterns, scale, and symmetry. A professional designer will give you a site plan that is precisely drawn to scale, but your own rough sketch or a survey map will be adequate for all but the most complex landscape designs. Once you have a plan to work from, you can start to indicate the positive and negative features of your yard (trees, shrubs, fences, outbuildings, pathways, views) and natural environmental factors such as light conditions and soil or drainage problems. Pathways and garden areas can be sketched right on the plan. If you enlarge sections of the plan, you can also use it to create your planting map.
Should you hire a professional landscaper or garden designer to help you with your site plan? If you have the means and desire to do so, it will probably be money well spent. Professional advice will always give you a valuable new perspective on your yard and gardens. You may follow their recommendations to the letter, or select only the elements that you find most appealing or most manageable. It is not necessary to contract for a full-scale site plan. Most designers will be very willing to focus their attention on a particular area (like the entryway). One well-conceived and well-executed feature may go a long way toward identifying a design style that you can then carry forward yourself.
What follows is a list of design principles that are common to all the creative arts, whether it be painting, music, literature, or garden design. Don't let them intimidate you. Just use them as tools to help you see.
Style. Every garden has a style or personality to it. Unless you have a very large yard that is divided into distinct areas or "rooms," it can be difficult to gracefully accommodate lots of different garden styles in one garden. Begin by thinking about whether you want your garden to have a formal or informal look. Consider your site, the style of your home, and your own personality. Though you don't have to be too rigorous about striving for a consistent style, you'll want to avoid a jumble of diverse and unrelated elements.
Flow. A garden is more pleasing if there is a logical progression from one area to the next. Think about how you would like someone to view and move through your garden. Paths are one way to connect some of the various parts to achieve a sense of order and cohesiveness. Focal points, such as a piece of sculpture, a distinctive tree, or a captivating view, can be used to draw the eye and pull us forward into a new space.
Scale. Scale is about proportions - how the sizes and shapes of things relate to each other. A 3 x 6-foot island bed floating in a half-acre sea of lawn will be seriously out of scale. The same will be true of a dwarf apple tree located in front of a two-story colonial house. Most scale problems are due to skimpiness, such as beds and paths that are too narrow, or plantings that are too small and tentative. If in doubt, err on the side of boldness and generosity.
Rhythm. By repeating plants and materials, you can produce a sense of rhythm, order, and predictability. Too much repetition is monotonous, but, as in music, variations on a theme are pleasing. You may want to repeat certain distinctive plant materials, such as the spearlike foliage of an ornamental grass or the velvety gray of lavender or santolina. Repeating splashes of color will also establish a rhythm in the garden and help to guide the eye. But don't be a slave to repetition. The best gardens always leave room for the unexpected—a giant pot of agapanthus, a whimsical birdhouse in a tangle of morning glories, or a blood-red rose tumbling over a stone wall.
Symmetry and balance. Humans seem to be naturally attracted to symmetry—toward creating perfectly balanced features. Our bodies are symmetrical, as are the cars we drive, the arrangement of windows in our homes, and often the shrubs that flank the front door. Used judiciously, perfect symmetry can be a powerfully appealing design technique. But when overused it can become stiff and boring. The natural landscape, which we also find visually pleasing, is not governed by symmetry. In nature, something more subtle is at work, something artists and designers refer to as balance. Balance is an essential factor in garden design. It refers to visual weight: a birch clump balanced by a large bed of hosta; a brick pathway balanced by a wide swath of lawn; orange Oriental poppies balanced by deep blue lupines. In these examples, the two elements are not identical in size, shape, or color, but there is a response from each side that balances the other. Successful garden design incorporates both symmetry and balance.
One thing great gardens share is a sense of place. Entering them is like entering a home—you are wrapped in a particular environment that is very different from the world outside. As in a home, the walls, roof, and floor help give a garden its unique character. When designing your own garden, you can use these aspects to create "rooms" in which plants are arranged in a context rather than floating in space.
Walls. English flower borders almost always have a background behind them. In England, this is usually a tall stone or brick wall or an evergreen hedge. The backdrop serves to stop your eye from roving and allows you to focus on the intended view. Most American gardeners don't make use of this very effective technique, and our gardens often get lost in the larger scene. Whenever possible, anchor your garden by placing something behind it: a structure, a fence, or a planting of shrubs. Remember to keep it simple. The objective is to direct the eye to the foreground, not create a competing element.
Roofs. Though there are plenty of very successful gardens that are totally exposed to the sky, most of us are naturally attracted to more sheltered, intimate spaces: a garden that's been carved out of a woodland or is nestled beneath an ancient apple tree. We are, for the same reason, drawn to arbors, bowers, allees, and pergolas. The roof need not cover your entire garden. Including the experience of enclosure somewhere in your garden—it can be as simple as an arbor at the entrance—will help to create that sense of being in a special environment set apart from the rest of the world.
Paths. Paths lead us through a garden and link one area to another. Paths in themselves are an age-old comfort, showing us the way we are to travel, assuring us of a progression that is safe and intentional. The paving material and the way the paths are laid out can help define the style of the garden. A meandering pathway made of flat stones spaced several inches apart will have an intimate, informal feel; a wide brick path suggests neatness and order; a broad path of closely mown lawn conveys grandeur and expansiveness. Paths also create edges that suggest where new plants or even entire gardens could be located.
Plants themselves can be important design elements, though few gardeners actually use them this way. The arching branches of a well-pruned cherry tree can frame an entire garden. The repetition of the spiky foliage of Japanese iris can be used to unify a long border. If you take the time to notice and experiment with the form, texture, and color of plants, you will discover a whole new palette of design elements with which to work. form. This is a three-dimensional consideration that takes into account the shapes and volumes of the plants in your garden.
A variety of different forms makes a garden interesting, but too much diversity can create visual confusion. Trees and shrubs often have characteristic forms that should be carefully combined to avoid clashing. Flowers, too, have characteristic shapes: the rounded heads of alliums, verbena, and globe thistle; the vertical spikes of delphinium, snapdragons, and veronica; the diaphanous look of baby's-breath and Queen Anne's lace; the strong architectural lines of a 5-foot martagon lily. You can experiment by grouping plants with the same form into a drift, or by repeating a pleasing composition of different forms several times.
Texture. Plants have a tactile quality that can be used as a valuable design tool. Think about how the glossy leaves of holly, magnolia, and roses contrast with the suede-like foliage of lamb's ears, heliotrope, and coleus. Or how the fat and fleshy leaves of a sedum differ from the needle-like foliage of rosemary or the quilted leaves of a blue-green hosta. Flowers also provide textural interest. They can be rich and velvety like a rose, or as thin and translucent as a poppy. Even tree bark contributes textural interest - especially during the winter months.
Color. Entire books have been written about using color as a design tool. You can approach color as a technician, using the color wheel to create harmonious combinations, or you can use your own eyes and emotions to guide you in creating the look and feel you want. Combining colors in new and interesting ways offers a lifetime of exciting possibilities.
As a general rule, red, orange and yellow are colors that jump out at you. They are lively and stimulating, and give the impression that they are closer to the eye than they actually are. If you plant too many hot-colored flowers, and don't balance them with cool-colored, less assertive plants, your garden will be a jumble of blaring trumpets. Green, blue, and violet are cool colors. In the garden these flowers create a more soothing, restful feeling, and tend to recede into the distance.
Visiting other people's gardens may be the best source of design inspiration. Take along a camera or sketch pad to capture features that you find particularly successful or appealing. Notice when some of the design techniques described above are being used. Don't be afraid to ask questions about what the gardener was trying to achieve.
Glossy picture books of gardens run a close second for design inspiration. They have the distinct advantage of being available for perusal year-round. Use sticky notes to mark images that capture your attention, then go back and review your choices to see where the similarities lie. Comparing and contrasting different types of gardens can be very useful in helping you decide what sort of look attracts you. If you are gravitating toward a theme garden (colonial, Japanese, Southwestern, English cottage), you'll find dozens of books that illustrate the design features and techniques that distinguish these styles.
Some garden design books include complete planting plans that are theme-oriented, or are specific to a certain type of site. They usually provide a site plan, a planting list, and an elevation drawing that shows what the garden will look like at eye level. You can follow the plan, or pick and choose the elements that appeal to you.
Creative gardeners read garden design books the way creative cooks read recipe books. Don't feel compelled to follow the garden design verbatim. You can lift ideas here and there, and combine them into your own unique expression.
Some purists believe that ornamentation—trellises, furniture, sculpture, and decorative planters—has no place in the garden. Others fill their gardens with so many decorative elements that it can be difficult to find the plants. Used judiciously, the furnishings and decorative features that you incorporate in your garden help give it style and character.
Decorative elements can be characterized as formal, informal, or somewhere in between. This has something to do with what the piece is (a whirligig versus a Japanese lantern), but also what the piece is made of. Fanciful wooden birdhouses and split-rail fencing have a casual, country feeling; whereas a bronze nude or a Grecian urn are more elegant and formal. When choosing decorative elements for your garden, the challenge is to select items that appeal to you, and that will also fit harmoniously with the style you are trying to achieve and any other decorative objects that you already own.
Customer photo by Lillian Robinson in Florida: "My beautiful Kelvin Floodlight Dahlia.The flower was large when it bloomed and I called it the dinner plate dahlia.It was chosen for the color and stands out beautifully. Right now it's taking center stage in my garden."
There are shrinking violets and then there are dahlias, which are nothing if not flamboyant. Their flowers can range from dinnerplate size to petite pompoms. Native to the Andes of South America, this daisy-family plant is a tender perennial in most areas of the country, but is hardy outdoors in USDA zones 8 to 10. In zone 7, they can survive winters with a thick layer of protective mulch.
Horticulturists have divided dahlias into 10 classifications, with numerous subcategories and fine distinctions. Because there are so many varieties, choosing dahlias is much more difficult than growing them. However, you can put dahlias into three broad groups: large, medium and small:
Large dahlias range from about 3 to 4 feet tall. The most well-known dahlias in this size range are Dinnerplate Dahlias, known for their 10- to 12-inch-diameter double flowers. These are best grown in the back of perennial borders with other large perennials. They put on a stunning late-summer and early-fall show, but will require some kind of support to withstand summer winds and rain.
Medium dahlias, also known as Border Dahlias, are compact 1- to 2-foot-tall plants. These dahlias look great in the front of a perennial bed mixed with other late-blooming perennials, such as phlox and asters. In addition, all Border Dahlias can be grown in containers. For something different, consider Cactus-Flowered Dahlias, such as those in the Cactus Dahlia Mixture, which have distinctive rolled petals.
Mignon Patio Mixture
Small dahlias are perfect for windowboxes. These 10- to 20-inch plants bloom for a long time and remain fairly compact. You can also use them at the edge of a border or in pots and planters.
Dahlias grow and flower best in a well drained, sunny site. They like warm weather and will not tolerate frost, so don't rush to plant them outdoors. Plant your dahlias in beds about the same time as you'd plant corn—when the soil has warmed. Most dahlias will begin flowering by midsummer.
If you live in a cold climate and want to get an early start, you can start your dahlia tubers in 1-gallon pots about two to three weeks before your last expected frost date. Once they've sprouted, place the pots under grow lights or in front of a sunny window (a south-facing window is best). After danger of frost has passed, transplant them gently into their garden location.
To plant all but the diminutive-sized dahlia types, dig a 6- to 12-inch-deep hole and amend the soil with compost. If the soil drains poorly, mix in some fine gravel. Backfill the hole with native soil and plant the tubers 2 to 4 inches deep, and about 1 to 3 feet apart, depending on the variety. Growth begins in 14 to 20 days.
Tall varieties, such as dinnerplate dahlias, will need support or staking to keep the heavy blooms from falling over. A simple wood stake is fine, but you can also use tomato cages, which are quickly covered by lush foliage. Just make sure to put the stakes or cages in place before the plants get large. To create a bushier plant, pinch off the top growth of the dahlia shoots above the third set of leaves while plants are still young. Shorter varieties are naturally bushier and won't need pinching.
Fertilize dahlias monthly with a water-soluble, organic fertilizer that's formulated for flowers. Avoid using a high-nitrogen fertilizer, or you'll get lots of green growth with little flowering. Mulch with straw or shredded bark to keep weeds to a minimum and retain moisture. Water regularly, especially during dry periods. Cut blossoms for indoor flower arrangements and remove old blossoms to encourage more branching and flower production.
In fall, after the first frost has blackened the foliage, cut off all but 2 to 4 inches of top growth, and carefully dig tubers without damaging them. Allow tubers to dry for a few days in a frost-free location, out of direct sunlight. Once dried, remove any excess soil, leaving 1 to 2 inches of stem. Store each clump of tubers upside down in a ventilated box or basket. Fill the box with slightly moistened sand, peat moss or vermiculite and place it in a cool, dry location with temperatures that remain between 45 and 55 degrees F. Check tubers periodically through winter for rotting and drying out. If the tubers appear shriveled, mist them lightly with water. If any start to rot, trim the rotted portion of the clump so it won't spread. The tubers are fragile, so be careful when handling them.