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A. Flowering Characteristics
A. christophii flowers in the late spring (May/June)
and lasts 2-3 weeks. Plants are 20-30 inches tall
with very large florets on a very large diameter
umbel.
B. General Characteristics
1. Origin of species: Turkestan
2. Common names: Ornamental Onion
3. Geophyte organ: Tunicated bulb
4. Hardiness type: Hardy II - Injured at temperatures
below 14 degrees F (-10C) when planted.
5. Natural reproductive systems and growth and
development requirements: A. christophii reproduces
by annual daughter bulb replacement and seed and
requires a warm (68 to 73F) - cool (28 to 35F)
- warm (55 to 65F) annual thermoperiodic cycle.
6. Primary uses: Beds, rock gardens, fresh and
dried cut flowers, and ground covers.
C. Cultural Information
1. Bulb sizes: 10/12 and 12/up cm, in circumference.
2. Planting density: 12 inches apart, 1 bulb per
sq. ft.
3. Planting depth: 5 inches to base of the bulb.
4. Planting time: Fall
5. Climatic zone habit: 1990 USDA Climatic Zone
3 with mulch, Zones 4 to 7 without mulch.
6. Light requirements: Full sunlight to PM only
sunlight.
7. Moisture: Tolerates summer drought, but requires
moisture during growing season.
8. Animal susceptibility: Normally not susceptible.
D. Companion Plants:
Alyssum, Arabis, Centaurea dealbata, Coreopsis,
Dianthus, Digitalis, Gypsophila paniculata, Hemerocallis
(yellow cvs.), Iris (rhizomatous white and yellow
cvs.), Kniphofia (yellow cvs.), Peonies (white
and yellow cvs.), Verbascum (white cvs.), Rhododendron
spp. (deciduous and evergreen), Cotoneaster, Berberis,
Acer palmatum, Deutzia gracilis, Weigela.
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