How to Grow Castor Oil Plant | Care and Growing Castor Beans

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Care and growing castor beans is simple and easy. Learn how to grow castor oil plant in this article.

Castor, botanically known as Ricinus communis, is a herbaceous perennial plant. It can be grown as an annual or perennial, depending on the weather.castor beans growing

USDA Zones — 9 – 11

Propagation Method — Seeds, cuttings

Difficulty — Easy

Soil Type — Neutral

Other names — Castor oil plant, wonder tree, arandi, kege, amanakku, chittamankku, ricin, castorbean, erand, eranda, gandharva hasta, graine de ricin, tangantangan Oil Plant

Native to Eastern Africa and India, the castor plant is world’s most poisonous plant. Still it is grown for various medicinal purposes and as an ornamental plant. It has large attractive foliage, star-shaped thorns and red seed capsules. Planting a castor plant is a great way to add some low-cost tropical touch to your home landscape but you should be aware if you’ve children or pets.

You can grow this plant as an annual in the Department of Agriculture (USDA) hardiness zones plant 2 – 9 and as perennial in USDA Zone 9b and above.

The plant grows rapidly, achieving height of six feet or more in just three months and reaches a maximum height of up to 12 m and is a very invasive plant in places where it is native of.

Conditions for Growing Castor Beans

Castor plant grows quickly and as it is native to tropics, it needs heat and warm temperature to grow, the optimal cultivation temperature is 77 – 86 F (25 – 30 ° C) with a good amount of light.

It is also possible to grow castor oil plant in coastal areas.


Growing castor beans plant is possible by seeds. Soak castor seeds in a glass of water for 24 hours before planting. Use filtered or purified water instead of tap water.

Planting Castor Beans

Sow castor seeds 1 inches deep and space the seeds at least 3 feet away. Keep the soil moist and transplant them to bigger pot or in the garden when the two real leaves emerge.

In the garden, space castor plants 3 feet apart. Add some well-rotted compost in the planting hole.

For growing castor beans in a pot, choose a large container and use potting mix or make it yourself by mixing equal parts of soil, perlite, peat and compost.

Requirements for Growing Castor Beans


The soil has to be rich in organic substance and must be well drained much as it does not tolerate water logging. Castor plant is quite adaptable to many types of soil.


Castor loves the sun but needs to be sheltered from the prevailing winds because of its height.


Castor plant prefers the soil to be always slightly moist. In winter, reduce watering and let the soil to dry out between watering spells.

Castor Oil Plant Care


Fertilize the castor plant once a month with an all-purpose fertilizer. Spread a layer of an inch of aged manure or compost around the base of plant when the buds begin to emerge.


Pruning is not necessary for castor plant.


Select the bean pods as they begin to dry on the plant. Either remove the castor plants from the garden with pods or leave them if growing as perennial. Wear garden gloves, long-sleeved shirt and long pants during harvesting castor beans and disposal of plants.

Pests and Diseases

It is not susceptible to any pests or diseases

Tips and Warnings

  • Keep the castor plant away from the reach of children. The toxic called ricin is mainly contained in the seeds but it is also found in castor leaves in low amount.
  • In any case ingestion of any part of castor plant should be avoided.
  • Castor plant can be allergic to some people but it is not poisonous when touched.
  • If you have pets make sure they do not eat the castor seeds or leaves.

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  1. Good day all, please, where can I get castle seed for planting and also when is the best time to plant castor seed.
    Many thanks.

  2. Hi my name is Alberto am new in this I just I want to know if I finish the harvest of castor oil I have to remove all the plants and start again or leave them they will grow again

  3. With due respect I would like to learn more about Castor oil plant(in detail). Please let me know everything about it(morphology,chemical composition,uses and benefits of every part,cultivation,care,harvesting,the uses of every part and method-procedures,uses in medicines,uses in cosmetics,uses in soaps and shampoo,uses as lubricants and various industries etc.)including required machines as wel-for factory too. Your’s sincerely-Dr.J.V.Shah.+977 9849154703.Pipara,Vaangangaa municipality-2,Kapilvastu,Nepal.

  4. I am a castor seed farmer with over 20 hecrares. For more information about castor seed from land selection to oil processing ,you can add me on whatsapp +2347032165844

  5. Hi please help with as much information as iam very much intrested in castor oil farming and please share information on were to sell the castor beans when harvested including the prices and the quality required thanks

  6. I do love and highly interested in Castor Oil plant cultivation, kindly add me to the group my WhatsApp number is 08060927221

  7. I am interested in farming with castor seeds.I need to know where the market is and if it is possible to export the beans from South Africa to markets on the African continent.Lastly if someone can advise me as to the value of the beans per ton.
    thank you in advance.

    my contact number is +27 844674427 (also for whatsApp)

  8. Hi guys
    Thanks for the very informative information.
    I will to have seeds . Share with existing farmers and want to be farmers.
    I am ving talks with some big buyers and ready to share the volumes .
    Guys when sharing your contact details add country code .
    Whatsapp contact : +27 73 117 8911


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