Castor Oil Plant, Castor Bean Plant 'Gibsonii'

Ricinuscommunis

Family
Euphorbiaceae (yoo-for-bee-AY-see-ee)
Genus
Ricinus (RISS-i-nus)
Species
communis (KOM-yoo-nis)
Synonym
Ricinus communis var. gibsonii
Ricinus gibsonii
Sun Exposure
Full Sun
Foliage
Grown for foliage
Evergreen
Height
36-48 in. (90-120 cm)
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 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
All parts of plant are poisonous if ingested
Bloom Color
Red
Bloom Time
Late Summer/Early Fall
Other Details
Category
Shrubs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Burgundy/Maroon
Where to Grow
Bloom Characteristics
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
Patent Information
Propagation Methods
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Bag seedheads to capture ripening seed
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Redding, California

Peyton, Colorado

Meriden, Connecticut

Cape Canaveral, Florida

New Port Richey, Florida

Alden, Kansas

Barbourville, Kentucky

Southold, New York

Waverly, New York

Hulbert, Oklahoma

West Newton, Pennsylvania

Sherman, Texas

show all

Featured Videos

Gardener's Notes:

1
positive
2
neutrals
0
negative
Sort By:
Sort By:
C
ROSLINDALE, MA | March 2016 | neutral

This species has naturalized in 34 states. As far north as Maine, it can overwinter as a self-sowing annual.

Where it is h...Read More

G
Sherman, TX (Zone 7b) | June 2009 | positive

The first time I saw this plant I knew that I MUST have it. That moment was definitely a "SEE"! I now have about 20 reds and 20 purples. ...Read More

B
Lakemont, GA (Zone 8a) | March 2007 | neutral

Introduced into English gardens in the 16th century. Stately quick-growing ornamental plant with tropical appearance, large reddish-tinge...Read More

Featured
Ragwort Crown-boring Moth
(Cochylis atricapitana)
Bar-tailed Godwit
(Limosa lapponica)
Featured
Ragwort Crown-boring Moth
(Cochylis atricapitana)
Bar-tailed Godwit
(Limosa lapponica)