grow · Grow

How to Grow Peppers from Seed

Start pepper seeds indoors 8-10 weeks before your last frost date. Plant seeds ¼ inch deep in seed starting mix, keep soil warm at 70-80°F, and provide bright light once they sprout. Transplant outdoors when soil stays above 60°F and all danger of frost has passed.

Ingredients

Step by step

  1. Start seeds indoors at the right time. Count back 8-10 weeks from your area's last frost date. Sweet peppers need this full time to develop, hot peppers often need even longer. Mark your calendar and don't rush it.
  2. Plant seeds in warm, sterile mix. Fill seed trays or small pots with seed starting mix. Plant seeds ¼ inch deep, one or two per cell. Pepper seeds are small but plant them with confidence — they know what to do.
  3. Provide bottom heat. Keep soil temperature between 70-80°F using a seedling heat mat or warm spot like the top of your refrigerator. Cool soil means slow or failed germination. Seeds will sprout in 7-14 days with proper heat.
  4. Give seedlings bright light. Once green shoots appear, move them under grow lights or to your brightest south-facing window. Keep lights 2-3 inches above seedlings for 14-16 hours daily. Leggy seedlings mean insufficient light.
  5. Water carefully and fertilize lightly. Keep soil moist but not soggy. Water from the bottom when possible to avoid disturbing tiny roots. Feed with diluted liquid fertilizer every two weeks once the first true leaves appear.
  6. Harden off before transplanting. Two weeks before transplanting, gradually expose seedlings to outdoor conditions. Start with one hour in shade, increase daily. This prevents transplant shock.
  7. Transplant outdoors when soil is warm. Wait until nighttime soil temperature stays above 60°F and all frost danger has passed. Plant in full sun, spacing 18-24 inches apart. Peppers sulk in cold soil, so patience pays off.

Tips & troubleshooting

Variations

Questions

Why aren't my pepper seeds germinating?
Cold soil is usually the culprit. Pepper seeds need consistent warmth to sprout. Check your soil temperature and add bottom heat if needed.
Can I save seeds from store-bought peppers?
Yes, but only from open-pollinated varieties. Hybrid peppers won't grow true to type. Let the pepper fully ripen, dry the seeds thoroughly, and store in a cool, dry place.
When should I transplant pepper seedlings to larger pots?
When roots start showing through the drainage holes or seedlings look top-heavy in their containers. Move them up one pot size at a time.
How long do pepper seeds stay viable?
Properly stored pepper seeds remain viable for 2-3 years. Keep them in a cool, dry, dark place. Older seeds germinate more slowly but often still work.
Should I soak pepper seeds before planting?
Not necessary for fresh seeds, but soaking older seeds for 8-12 hours in warm water can improve germination rates. Don't oversoak or they may rot.

Further reading