How to Save Castor Bean Seeds

A view of the underside of a castor bean plant
A view of the underside of a castor bean plant (Image: Medioimages/Photodisc/Photodisc/Getty Images)

Castor bean plants, also known as mole plants due to a reputation for repelling moles, are a beautiful annual ornamental that grows quickly and may reach higher than 8 feet by the end of summer. The seeds of Ricinus communis are extremely toxic, so be careful when handling and saving them.

Things You'll Need

  • Netting
  • Gloves
  • Storage container
  • Rice grains or silica packet

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Select seed pods for saving high off the ground and put netting around them so they don’t fall to the ground. Remove and throw away immature seed pods from elsewhere on the castor bean plant. Allow the netted pods to turn brown and dry; the plant will have started to die back or may have completely dried up.

Put on gloves and clip a seedpod from the castor bean plant. Break the pod apart with your gloved fingers into three parts, each part containing one seed.

Peel the outer covering carefully to reveal the seed. Dispose of the materials except the seeds; placing these in a compost pile is fine.

Dry the seeds for a week or two in an area not accessible by pets or children, such as on top of a refrigerator or high shelf. If you have cats that jump on shelves, place the seeds in a cabinet or box that the cat and children cannot access.

Place the dry seeds in a paper envelope, a plastic bag or sealed plastic container. Adding a few grains of rice or a silica packet to the container is a good idea though not required. Store the seed container in a dark and dry area, again one not accessible to children and pets. In the spring, plant your seeds to create a new crop.

Tips & Warnings

  • Wear gloves and wash hands after handling seeds.
  • These seeds (beans) are highly toxic to people and animals. Keep out of reach!


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