Starting Vegetables Indoors from Seed: Complete Guide for Transplant Success

March dreams of spring gardens become reality by starting seeds indoors 4-10 weeks before last frost (mid-May in many regions).

Best Candidates for Indoor Starting

Transplant well: Lettuce, beets, broccoli, cabbage, cauliflower, eggplant, onions, peppers, tomatoes.
Avoid transplanting: Carrots, peas, corn, cucumbers, pumpkins, beans, squash—direct sow instead.

Success hinges on correct temperature, light, and moisture.

Seed-Starting System

• Mix: Equal parts peat moss, perlite, vermiculite (garden centers).
• Containers: Any with drainage—trays, pots, recycled. Clean thoroughly.
• Sow: Per packet depth. Cover with plastic for humidity; remove at germination.
• Water: Mist to keep moist, not soggy.
• Temperature: 65-75°F.
• Light: Sunny window works; fluorescent 2-4" above, 16 hrs daily is better.

Seedling Care & Transition

• Thin weak seedlings at first true leaves; fertilize 1-2x weekly (dilute).
• Transplant to individual pots at several leaf sets. Peat pots go straight to garden.
• Harden off: 2 weeks before planting, gradually increase outdoor exposure (hours/day).

Consult your local agricultural extension office for frost dates and region-specific advice—free expert guidance for home gardeners.