Photo by Melody

PlantFiles: Castor Bean, Caster Oil Plant
Ricinus communis 'Red Spire'

Family: Euphorbiaceae (yoo-for-bee-AY-see-ee) (Info)
Genus: Ricinus (RISS-i-nus) (Info)
Species: communis (KOM-yoo-nis) (Info)
Cultivar: Red Spire

19 members have or want this plant for trade.

Tropicals and Tender Perennials

4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)

36-48 in. (90-120 cm)

USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

All parts of plant are poisonous if ingested

Bloom Color:
Maroon (Purple-Brown)

Bloom Time:
Late Fall/Early Winter

Grown for foliage

Other details:
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
Direct sow as soon as the ground can be worked
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds

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Thumbnail #7 of Ricinus communis by TUTMOS

There are a total of 17 photos.
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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive FlyGalsMom On Aug 14, 2013, FlyGalsMom from Staten Island, New York City, NY (Zone 6b) wrote:

I start these in biodegradable peat pots. Not the kind that expands, as the seedlings need room for the roots. I tried that once and the seedlings were very tiny. As soon as the weather is warm enough, I transplant outside. Some have gotten as big as trees.
I live in zone 6B 7A, they do not make it through the winter.


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

Glendale, Arizona
Phoenix, Arizona
Marysville, California
San Jose, California
North Port, Florida
Orange Park, Florida
Shepherdsville, Kentucky
Staten Island, New York
Easton, Pennsylvania
New Galilee, Pennsylvania
San Antonio, Texas
Pearisburg, Virginia

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