Fill biodegradable pots or seed trays with seed starting mix, then plant 1-2 tomato seeds per pot about 1/4 inch deep and lightly cover them with soil.

Water the planted seeds gently, ensuring the soil is moist but not waterlogged, and place the pots under grow lights or in a warm, sunny window.

Maintain consistent moisture and warmth (around 70-80°F or 21-27°C), and expect germination within 5-10 days, after which you can remove any weaker seedlings, leaving one strong plant per pot.

Once seedlings have two sets of true leaves, begin fertilizing with a diluted liquid fertilizer every two weeks, ensuring they receive at least 12-16 hours of light daily.

Gradually introduce the plants to outdoor conditions over a week (hardening off) by placing them outside for increasing durations each day, then transplant them into larger containers or a garden bed when they are 6-8 inches tall and all danger of frost has passed.