Seed Starting Guide: Growing Flowers from Scratch

Why Start from Seed?

Growing flowers from seed is economical, offers access to rare varieties, and provides the deep satisfaction of nurturing plants from their very beginning. While it requires patience, the rewards are immense.

Essential Supplies

• Seed starting mix: Light, sterile, and designed for delicate seedlings
• Containers: Cell trays, peat pots, or recycled containers with drainage
• Light source: South-facing window or grow lights
• Heat mat: Optional but helpful for warm-season flowers
• Labels: Essential for keeping track of varieties

Timing Your Seeds

Count backward from your last frost date to determine when to start seeds indoors. Most annual flowers need 6-8 weeks of indoor growth before transplanting. Check seed packets for specific timing recommendations.

The Planting Process

1. Moisten your seed starting mix before filling containers
2. Plant seeds at the depth recommended on the packet (usually 2-3 times the seed diameter)
3. Cover containers with plastic wrap or humidity domes until germination
4. Provide bottom heat for warm-season flowers like zinnias and marigolds
5. Remove covers once seedlings emerge and provide strong light

Caring for Seedlings

Young seedlings are vulnerable. Keep soil consistently moist but not waterlogged. Once true leaves appear, begin feeding with diluted fertilizer. Thin overcrowded seedlings to give each plant room to develop.

Hardening Off

Before transplanting, gradually expose seedlings to outdoor conditions over 7-10 days. Start with a few hours of filtered light and protection from wind, gradually increasing exposure until plants can handle full outdoor conditions.