BULBS

1
BULBS

• Original PowerPoint Created by Howard Henderson
• Modified by Georgia Agricultural Education
  Curriculum Office
• June, 2002

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BULBS

• Refers to bulbs, corms, tubers, and rhizomes
• These are structures that contain an embryonic
  plant.

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Uses of Bulbs in the Landscape

• In wooded areas
• In rock gardens
• With evergreen shrubs
• As cut flowers

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Flowers Grown from Bulbs

• Hyacinths
• Tulips
• Daffodils
• Flowers can be used as cut flowers, in rock
  gardens, and in wooded areas.

5
Landscaping

• The effect most striking when landscaping with
  bulbs is massing, or planting in circular groups.

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Planting in Fall

• Bulbs planted in the fall give color to the
  landscape in the early spring.

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Organic Matter

• Bulb production can be increased by the addition
  of well-rotted manure.

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Type of soil

• Loam
• Well-drained
• Add organic matter 3-4 in. thick work into the
  soil.

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Soil pH

• If soil pH is below 6.0, add 10 lb. of ground
  limestone per 100 square feet.

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Fertilizer

• Fertilize by digging a small amount of 5-10-5
  fertilizer into the bottom of the bed.
• Fertilizer should be covered with about 1 of
  soil.
• DO NOT place the bulbs in direct contact with
  the fertilizer.

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Spacing

• As a general rule, bulbs should be spaced the
  same distance apart as their planting depth.

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Storage

• Keep bulbs that are dug up at 50 degrees F.

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Protection

• To protect from insects, diseases, and rodents,
  dust bulbs with a pesticide.

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Spring Planting

• Plant tuberous begonia, calla, gladiolus,
  dahlia, tigridia, montbretia, ismene, amaryllis,
  anemone, and ranunculus

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Fall Planting

• Plant muscarri, hyacinth, crocus, scilla,
  chionodoxa, colchicum, iris, lily, tulips, and
  daffodil.

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Care of Spring Flowers

• Bulbs flowering in the spring should be dug
  after the foliage turns yellow and dies back.
• Daffodil, crocus, lily, and colchicum bulbs
  should be dug up every 3-5 years, thinned and
  replanted.

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Care of Summer Flowering Bulbs

• Bulbs flowering during the summer should be dug
  after the first fall frost (ex. Dahlia,
  tuberous-toot begonia, calla, and gladiolus).

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Cold Treatment

• It takes 10 to 12 weeks for forcing a tulip to
  bloom.
• You should use large bulbs
• For root formation you should place potted bulbs
  in a cold frame.

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Forcing Bulbs

• Put bulbs in pots.
• Store bulbs at 40-50 F. for 10-12 weeks.
• Put pots in greenhouse at 60 F.
• Keep pots moist.