How to Grow Cactus Seeds
Updated on Nov 15, 2021
By Shannon McCabe
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.
- 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 cotelydon stage, plants can sit in bright, indirect sunlight.
- Water plants about once a week, allowing soil to dry between waterings.
PESTS/SPECIAL CONSIDERATIONS
- No particular pests or disease.
- 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.
