Growing Cacti from Seed: A Beginner's Guide to Desert Plants

Cacti (family Cactaceae) are New World succulents adapted to extreme aridity. Stems photosynthesize; leaves modified to spines. Flowers often nocturnal (bat/moth pollinated). Lifespans 25–300+ years.

Seed Propagation

1. Harvest ripe pods (twist off easily) before drying
2. Slice open; scrape seeds into 2:1 water:coarse sand
3. Sow evenly on moist mix; cover lightly
4. Maintain 70–80°F, high humidity (plastic dome)
5. Germination: days to weeks; seedlings resemble red pencil erasers
6. Spines appear gradually; ventilate slowly

Handling and Pests

• Use tongs or heavy gloves—spines penetrate standard gloves
• Mealybugs (white cottony): remove with alcohol swab
• Scale (brown bumps): scrape + horticultural oil
• Spider mites (fine webbing): increase humidity, miticide if severe

Culture

Bright light, fast-draining mineral soil, minimal water (dry between), no fertilizer first year. Cold-hardy species exist for outdoor gardens in zones 4+.