Bulbs

Bulbs are a very specialized group of perennial plants. While a true bulb (allium, narcissus, lilium,etc.)is a short underground stem surrounded by modified fleshy leaves that protect and store food for use by the plant, corms (gladiolus), rhizomes (iris and calla), tubers (begonia), and tuberous roots (dahlia) are often referred to as bulbs.

Most bulbs prefer soil that drains well yet retains a certain amount of water. They are typically planted in the early fall, with exception to gladiolus, montbretia, schizostylis, tigridia which are planted in March or April. Plant bulbs at a depth three times as deep as the bulb's diameter and allow them to grow until they turn yellow and die. Green leaves manufacture foods that are stored in the bulb for the following years growth. Fertilize bulb plants immediately after flowering to assist in the process. Narcissus, scilla, and muscari are excellent for naturalizing, while others like tulips and lilies are better adapted for planting in formal beds.

The Greenscape Guide Top 21 Bulbs [Back to Top]

The following table provides a list of bulbs recommended by the Greenscape Guide that can be grown in northern and southern climates.

Drumstick Allium
Garden excitement! Intriguing novelty flowers turn from green to burgundy as they mature. Long-lasting 1 1/2" blooms thrive anywhere. A favorite in dried arrangements; a vivacious bloom in fresh bouquets.

Zone

3-6
Hardy Amaryllis Mixture

Amaryllis species are quite unique in that they are especially well suited for growing in the garden or in patio containers. Each bulb sends up at least two stems bearing 3-4 exotic blooms each. Amaryllis varieties grows to around 12"-16" tall and requires no staking.

Zone

7-9
Double Anemone Red and White

Suitable for the front of your borders and cutting gardens, showy daisylike flowers of Double Red Anemone Governor mixed with large, poppylike flowers of White Double Anemone Mount Everest are excellent naturalizers and outstanding in bouquets.

Zone

3-6
Prima Donna Dinnerplate Begonia Collection
Begonias are known for having the largest blooms of their species, making them ideal for most containers and decorative borders. Begonias flower all summer until the fall frost and thrive without pampering. Water them only during dry periods and don’t worry about pruning – when new blooms appear, old ones drop off! 5-6 cm tubers. More...
Zone
3-9
Elephant Ear Caladium
Look of the tropics in your backyard! Plant Caladium as a lush screen, along shady borders, in pots. Grows to 4 feet. Full to partial shade, moist soil.  

Zone

8-10
Dutch Canna Collection
Enjoy flamboyant Canna blooms and showy foliage when big, bold flowers are scarce. Perfect for the back of a border or in a pot to brighten up any garden. Plant 15-20" apart in full sun or partial shade.  

Zone

7-9
Black Magic Colocasia
This species of taro has glossy leaves up to 2 feet long, with deep purple color. Plant as a dramatic screen or use to fill in along north-facing foundations. Towering form, 5-6 feet tall. Best planted in full to partial shade and moist soil. 
Zone
9-10
Lily-of-the-Valley
Lily of the Valley is fragrant with tiny white bells and emerald green foliage. It is a delight in the springtime border. It prefers partial to full shade and grows 6" tall. It blooms in late spring. 
Zone
3-9
Ruby Giant Snow Crocus
With velvety deep purple petals, a snow crocus blooms before the giant crocus. It may be planted nearly everywhere and is lovely in rock gardens, naturalized in lawns or grouped together under trees and shrubs.
Zone
3-6
Dark Pink Hardy Cyclamen
Hardy Cyclamen is a gorgeous shade-loving plant with elegant marbled foliage. It flourishes under trees and shrubs and produces up to 30 dainty, brilliant dark pink flowers per bulb.  
Zone
5-8
Kaleidoscope Dutch Dinner Plate Dahlia Collection
Dahlias produces huge, vibrant 5-9" flowers on a plant that grows 2-4' tall. Plant them after the danger of frost has passed. These giant Dinner Plate Dahlias celebrate long, warm days in the sun, well-drained soil and protection from strong winds. They begn flowering in early summer and keep on blooming well into the fall. More... Zone
3-10
Double Freesia Mix
A favorite for weddings, freesia’s sweetly fragrant, double booms beautify borders, pots and rock gardens in early summer. A mix of rich colors. Grows 10-15 in. tall in sun or partial shade. 

Zone

9-10
Double Snowdrops
These snowdrops produce masses of ruffled white and emerald green blooms atop sturdy stems. They are so hardy they burst into bloom at the first hint of spring, often before the winter snows melt. Bring them indoors to chase away those winter blues!  

Zone

3-6
Hardy Gladiolus Mix
This gladiolus species is hardy enough to be left in the ground from year to year in all but the coldest areas. Its delightful patterns and colors will grace your garden every summer. 
Zone
3-10
Blue Jacket Giant Fragrant Hyacinths
These Dutch hyacinths will be the pride of your early- to mid-spring garden and a source of delight for all your senses. The garden-size bulbs are easy to grow and they produce 8-10" stems covered with fragrant florets. Plant them near a window, and they will fill your home with heavenly fragrance.

Zone

4-8
Red Carpet Border Lilies
These Asiatic lilies are 5-6” across and return year after year, spreading in number and beauty. All they need is a well-drained undisturbed location. Parade these gems in front of a garden border or plant en masse for a phenomenal garden display.

Zone

3-9
Grape Hyacinth Mixture
A mixture of little grape hyacinths includes blooms of pale blue, cobalt blue and bicoloured blackish violet with violet-blue upper bells. Interplant them with other spring bulbs, or plant in drifts for a shimmering, pondlike effect.

Zone

4-9
Breck's Colossal Daffodil
These daffodils have broad petals like rays of sunshine surrounding a bright trumpet. Sturdy stems hold the extra-large 5" flowers high. Unsurpassed for bringing warmth to your springtime garden and illuminating bouquets.

Zone

3-9
Ranunculus Mix
Imported from Turkey, these richly colored gems love warm weather! Great for borders and rock gardens in full sun. Blooms early to midsummer on 15-in. stems. 4+ cm bulbs.
Zone
3-5
Spring Starflower Mixture
Charming star-shaped flowers of white, lilac and blue sparkle in borders, rock gardens and naturalized plantings. Fast growing plants will increase dramatically over the years, adding colour and fragrance to any springtime setting.
Zone
5-10
Kaleidoscope Tulips
Top-quality 11-12 cm bulbs yield bountiful blooms for bright bouquets in dazzling solids and multicolours to fill your home or to share with friends
Zone
4-9

*Wyman, Donald. Wyman's Gardening Encyclopedia. New York, NY: Scribner, 1986.

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