How To Grow and Save Seed of Cactus
This cactus mix contains two to three varieties: Opuntia microdasys, Thelocactus setispinus, and Mammillaria fraileana. Cacti are very slow to grow. However, they will live for many years and are very rewarding to grow.
Ornamental. Excellent houseplants.
- The seeds are small, and contrary to how mature cactus-like to grow, they require high humidity and regular moisture to germinate.
- Ideal germination temperature is 70-75 F.
- Sow seeds in spring, water trays regularly, and consider covering trays in plastic wrap to trap humidity.
- The seeds should germinate in 7-21 days.
Once the seedlings have grown past the cotyledon stage, plants can sit in bright, indirect sunlight. Water plants about once a week, allowing soil to dry between waterings.
No particular pests or diseases. Take care not to overwater as they will rot with too much moisture.
- Seeds can be harvested by hand (wear gloves or use tweezers!).
- Allow cactus to bloom and fade; there will be a small fruit or seed capsule left over, you can allow it to dry completely, or harvest the fruit when young. If harvesting while young, just squeeze the seeds out onto a paper towel to dry and carefully shake the dried seeds into a sealed container.
- Store in a cool, dark, dry place.