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Download Plant Card 2016-08 Ricinus communis.pub
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Castor Bean Ricinus commnis Castor Bean Ricinus communis Stem & Leaf Type: her baceous Size: 6-10’ tall; 2-4’ wide USDA Hardiness Zones: 9-11 Leaves: huge, palmately lobed, toothed, glossy, may cause allergic skin reaction Leaf Color: gr een, sometimes with r eddish color s Fall Color: n/a Flowers: apetulous gr eenish-yellow flowers in spikes, female flower with red stigma; June-October Fruit: spiny, r eddish br own seed capsules, poisonous Light: full sun to par t shade, toler ates full shade Moisture: moist, well-drained. Insect/Disease Issues: No ser ious pr oblems. Spider mites may appear. All parts of plant poisonous! Nativity: Nor theaster n Afr ica to Middle East Location in the Gardens: Campanile Gar den Family: Euphorbiaceae Culture & Landscape Value: This bold and large annual plant is best used in large planting beds or very large containers. Grow in full sun and moist, well-drained soils. Plants will tolerate some shade, but prefer the full sun. Many will grow 8’+ in one season, although some dwarf cultivars exist. All parts of this plant are poisonous and this species is the source of castor oil—which is not toxic. Plants grown from garden collected seed have some variation in size and leaf color (more green to more burgundy). Plants can set seed that overwinters in the garden, but seedlings are easy to identify and rouge out in spring if they are not desired. Grow from seed soaked overnight in water 6 weeks prior to setting outside. Ricinus is a monotypic genus containing just one species. Notes: Several cultivars are available. Here are a couple to look for: ‘Scarlet Queen’ - burgundy leaves and bright orange-red flowers ‘Carmencita’ - a very nice cultivar with bronzy leaves, red flowers growing 5’ to 6’ tall. ‘Laciniatus’ - deeply divided green leaves Months of Interest: August 2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec