Saving Seeds and Taking Cuttings of Solanum pyracanthos (Porcupine Tomato)

This striking, thorny annual/perennial (Zones 9–11) can be saved via seeds or cuttings. Here’s how to keep it going in New Hampshire (Zone 5).

Overwintering the Parent Plant

• Bring pots indoors before frost.
• Place in a bright, cool (50–60°F / 10–15°C) spot.
• Water sparingly; cut back in spring before moving out.

Taking Cuttings (Best for True-to-Type)

1. Take 6-inch tip cuttings from non-woody stems.
2. Remove lower leaves; dip in rooting hormone.
3. Root in moist potting mix under humidity dome.
4. Keep warm, bright, indirect light; roots in 3–4 weeks.

Saving Seeds

1. Wait for seed pods (like tiny green tomatoes) to swell and begin to dry.
2. Cut pods; dry in a paper bag several days.
3. Store in sealed bag in refrigerator for 3+ months (cold stratification).
4. Sow in spring on surface of moist mix; light aids germination.

Important Warning

Most nursery plants are hybrids. Seeds may not produce identical plants. Cuttings guarantee the same thorny, purple-flowered beauty. Assume hybrids unless labeled heirloom/open-pollinated.