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

Category:

Annuals

Tropicals and Tender Perennials

Height:

4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)

8-10 ft. (2.4-3 m)

Spacing:

36-48 in. (90-120 cm)

Hardiness:

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

Danger:

All parts of plant are poisonous if ingested

Bloom Color:

Maroon (Purple-Brown)

Bloom Time:

Late Fall/Early Winter

Foliage:

Grown for foliage

Burgundy

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:

Non-patented

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

Regional

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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Gardeners' Notes:

1
positive
0
neutrals
0
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RatingContent
Positive

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.