Crown Imperial Fritillaria
Fritillaria imperialis 'Rubra'

Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Fritillaria (frit-il-AR-ee-uh) (Info)
Species: imperialis (im-peer-ee-AL-is) (Info)
Cultivar: Rubra

Category:

Bulbs

Height:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)

Spacing:

6-9 in. (15-22 cm)

Hardiness:

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade

Light Shade

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Red-Orange

Bloom Time:

Mid Spring

Late Spring/Early Summer

Foliage:

Herbaceous

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Non-patented

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

This plant has been said to grow in the following regions:

Clifton, Colorado

Chicago, Illinois

Indianapolis, Indiana

Pinconning, Michigan

Coshocton, Ohio

Klamath Falls, Oregon

Kalama, Washington

Pullman, Washington

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Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Aug 15, 2005, GreenAtHeart from Franklin Grove, IL (Zone 5a) wrote:

We planted two Crown Imperial bulbs in a corner of our yard in Chicago10 years ago. The next year, one came up, grew quickly to about two feet and died back. It has actually bloomed three times since then and in the "off" years it sends up a fast growing stem - but yellows and dies before reaching full height. In our experience, the non-thriving years are those with a really wet Spring. This does not seem unusual for this plant - and we like it any year it chooses to bloom.