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Allium giganteum

Buy Any 3 Perennial Plants or Bulbs & Save 20%

Short Description

Giant, eight inch blooms

Full Description

The largest blossoms of the ornamental onions, Allium giganteum adds color and structure in perennial flower bed. We recommend planting this variety with the Fordhook Sun perennial collection. Alliums are deer resistant flowers that flower late in the spring to early summer. They provide color in the garden between the finale of the spring bulbs and the summer show of the perennial flowers. Bulb size is 20 cm. and larger.
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Item#: 78017
Order: 1 Bag ( 3 bulbs)
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Allium giganteum
Allium giganteum, , large
Item #: 78017
1 Bag ( 3 bulbs)
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Product properties

Zone This refers to the USDA hardiness zone assigned to each part of the country, based on the minimum winter temperature that a region typically experiences. Hardiness zone ranges are provided for all perennial plants and you should always choose plants that fall within your range.

4-9

Sun The amount of sunlight this product needs daily in order to perform well in the garden. Full sun means 6 hours of direct sun per day; partial sun means 2-4 hours of direct sun per day; shade means little or no direct sun.

Full Sun

Height The typical height of this product at maturity.

36-48 inches

Spread The width of the plant at maturity.

10-12 inches

Bloom Season The time of the year when this product normally blooms.

Spring, Summer

Resistant To Adverse garden conditions, such as heat or frost, deer or rabbits, that this product can tolerate well.

Cold, Deer, Drought, Heat, Rabbit

Restrictions:

Item 78017 cannot ship to: AA, AE, AK, AP, AS, CN, FM, GU, HI, ID, MH, MP, PR, PW, VI, WA
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Allium: Perennial Bulbs and Plants
Planting Bulbs in Fall:

  • Choose a location in full sun with a rich, well-drained soil. Alliums are long lived plants so be sure to choose a location where they may grow undisturbed for many years.
  • Prepare the bed by turning the soil under to a depth of 6-12 inches removing any debris, and lightly raking as level as possible.
  • The addition of organic matter (leaf mold, compost, well-rotted manure) benefits all gardens and is essential in recently constructed neighborhoods.
  • It is a good idea to add fertilizer, such as bonemeal, when you prepare the soil. Be sure to mix the fertilizer into the soil so it does not come into direct contact with the bulbs.
  • The general rule for planting is to cover the bulb with soil to 3 times its vertical diameter. In very cold climates, or where the soil is very light and sandy, plant a little deeper. In heavy soils, or in areas with a high water table, plant slightly more shallowly. Plant all bulbs of a kind, when grouped together, at the same depth so they will bloom at the same time and attain the same height.
  • For planting clumps of bulbs in beds and borders, dig a hole large enough to hold all the bulbs in one group or drift. Set them upright at the bottom of the hole, tops up (pointed side up), and space properly. Press the bulbs into the soil and cover with the prepared soil to the recommended depth. You can also use a trowel to dig individual holes.
  • Alliums should be planted 3-6 inches apart, 4-6 inches deep.
  • After planting water thoroughly to settle the soil and to encourage the start of root growth. Sufficient moisture is vital to the health of your bulbs; lacking ample rain, it may be necessary to water new plantings once a week in fall. The roots will continue to grow in fall until the soil freezes.
  • Be sure to mark where you planted your bulbs so you know where they are in spring.
  • Add 1-3 inches of mulch for winter protection after the ground freezes.

Planting Potted Plants in the Garden:

  • Select a location in full sun with rich, well-drained soil. 
  • Prepare the bed by turning the soil under to a depth of 6-12 inches removing any debris, and lightly raking as level as possible.
  • The addition of organic matter (leaf mold, compost, well-rotted manure) benefits all gardens and is essential in recently constructed neighborhoods.
  • Plant on a cloudy day or in late afternoon to reduce transplant shock.
  • Dig a hole for each plant large enough to amply accommodate the root ball. 
  • Unpot the plant and gently loosen the root ball with your hands to encourage good root growth. 
  • Place the top of the root ball even with the level of the surrounding soil. Fill with soil to the top of the root ball. Press soil down firmly with your hand. 
  • Use the plant tag as a location marker. 
  • Thoroughly water and apply a light mulch layer on top of the soil (1-2 inches) to conserve water and reduce weeds.

How to Grow

  • Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their germination. 
  • Mulches also help retain soil moisture and maintain even soil temperatures. For perennials, an organic mulch of aged bark or shredded leaves lends a natural look to the bed and will improve the soil as it breaks down in time. Always keep mulches off a plant’s stems to prevent possible rot.
  • Careful watering is essential in getting perennials off to a good start. Water thoroughly at least once a week to help new roots grow down deeply. Soil should be damp at about 1 inch below the soil surface. You can check this by sticking your finger in the soil. Water early in the morning to give all leaves enough time to dry. One inch of rain or watering per week is recommended for most perennial plants. You can check to see if you need to add water by using a rain gauge.
  • Until plants become established, some protection from extreme winds and direct, hot sunlight may be necessary. Good air movement is also important.
  • After new growth appears, a light fertilizer may be applied. Keep granular fertilizers away from the plant crown and foliage to avoid burn injury. Use low rates of a slow release fertilizer, higher rates may encourage root rots.
  • Remove and discard foliage after a hard frost in fall.
  • In general allium clumps may be left undisturbed for years and only need to be divided when they are too crowded to blossom freely.  
  • Alliums make wonderful, long lasting cut flowers.
  • Alliums flower from spring to summer depending on the variety.
  • Alliums may also be planted in containers.
Zone
4-9
Sun
Full Sun
Height
36-48 inches
Spread
10-12 inches
Bloom Season
Spring, Summer
Resistant To
Cold, Deer, Drought, Heat, Rabbit
Ornamental Use
Borders, Cut Flowers
Planting Time
Fall
Genus
Allium
Life Cycle
Perennial