Seed Starting Mastery: From Packet to Transplant

Growing from seed unlocks variety, economy, and the deep satisfaction of shepherding plants from day one. A $3 seed packet yields dozens of plants that would cost hundreds at a nursery. The process is straightforward—seeds want to grow; your job is removing obstacles.

Timing and Planning

Read packets for "weeks before last frost." Most annuals/vegetables: 6–8 weeks. Perennials/onions: 10–12 weeks or fall sow. Create a calendar. Share packets with friends—each grows different varieties, then swap transplants.

Essential Supplies

Medium: Sterile seed-starting mix (not potting soil)—fine texture, pathogen-free, low nutrients.

Containers: Cell packs, soil blocks, or recycled containers with drainage. 2–3" deep.

Light: 12–16 hrs/day. Shop LEDs (4000–6500K) 2–4" above seedlings. Adjust daily.

Heat: 70–75°F (21–24°C) for germination. Heat mat accelerates.

Sowing Technique

Moisten mix → fill cells → firm gently. Sow depth = 2–3× seed diameter. Tiny seeds (petunia): surface sow, press in, don't cover. Large seeds (nasturtium): individual holes. Label everything.

Cover with humidity dome or plastic. Vent daily. Remove at first germination.

Seedling Care

Water: Bottom-water or mist—keep surface damp, not soggy.

Thinning: At 2 true leaves, snip extras at soil line—1 per cell.

Feeding: Half-strength liquid fertilizer at 2 true leaves, weekly.

Air movement: Gentle fan prevents damping off, strengthens stems.

Hardening Off and Transplant

7–10 days before planting: 1 hr shade → add 1 hr daily → full sun. Protect from wind. Transplant on cloudy day/evening. Keep root ball intact. Water in with dilute fertilizer.

Seed starting is gardening in its purest form—witnessing the entire life cycle. The skills you build here elevate every future garden endeavor.