Starting Seeds Indoors: Complete Guide

title: "Starting Seeds Indoors: Complete Guide"

Starting seeds indoors extends the growing season, gives you access to varieties that nurseries don't stock, and costs a fraction of buying transplants. Done correctly, it produces stocky, vigorous seedlings ready to transplant after hardening off. Done incorrectly — with inadequate light, wrong timing, or too-warm temperatures — it produces leggy, weak seedlings more likely to fail than transplants from the nursery.

The three most common failures are: starting too early (plants outgrow their space before it's time to plant out), insufficient light (leading to leggy, weak growth), and incorrect soil temperature for germination (especially for peppers and eggplant, which need 80°F+ soil to germinate reliably).

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Table of Contents

1. Calculate Your Start Date
2. Equipment
3. Seed Starting Mix
4. Sowing Seeds
5. Germination: Heat and Moisture
6. After Germination: Light and Temperature
7. Thinning and Fertilizing
8. Common Problems
9. Frequently Asked Questions

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