How to Germinate Castor Beans

Castor beans have long been used as a source of oil, historically for lamp oil but in the 20th and 21st century as a machine and lubrication oil. Over 50 percent of the bean's weight is in oil. The plant is striking with huge multi-lobed leaves that can grow almost 3 feet long, making it popular as an ornamental plant. They are a little stubborn about germinating but with the right set of circumstances you can grow your own castor bean plant.

Bowl
Potting soil
Plant pot or tray with drainage holes
Pencil

Instructions

- 1
  Rinse the seeds thoroughly to remove any debris clinging to them that might be a food source for fungus. Throw away any broken seeds or seeds with the hulls still attached. Cover them in cool water in a bowl and soak them for 10 to 12 hours or overnight.
- 2
  Fill your planting container with at least 6 inches of potting soil. Moisten the soil so that it is damp through but not soggy. Poke holes about 1 1/2 inches deep and at least 3 inches apart with a pencil.
- 3
  Drop the soaked seeds into the holes and press the soil in over them. It is critical that the seeds stay moist or they will not germinate. Water the planted seeds every day, letting the excess drain away, not sit under the container.
- 4
  Keep the planted seeds in an area where they can stay a steady 65 to 70 degrees. These castor beans are native to the tropics and do not grow well in cold temperatures.
- 5
  Allow 10 to 21 days for germination, keeping the soil consistently moist and warm the whole time. If you use a plastic cover to conserve moisture, make sure there are ventilation holes to allow for air transfer to prevent fungus from growing.

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