Timing
Start seeds indoors 5-6 weeks before transplanting outdoors into warm soil. Bottom heat can help with germination. Transplant outdoors once plants develop their at least three true leaves. Ensure any risk of frost has passed.
Starting
Sow 2-3 seeds, 1/4 inch (0.6 cm) deep. Thin to one plant per pot once seedlings reach 3-4 inches tall, typically around the time they have their third true leaf. Keep the strongest seedling and cut the others at the base before transplanting.
Growing
Determinate tomatoes are ready to transplant once they are 6–10 inches tall and have a sturdy stem. Start hardening off about a week before transplanting by gradually introducing the plants to outdoor conditions—begin with a few hours in the shade and slowly increase sun exposure and duration.
Transplant tomatoes to a 5 gallon container (12" diameter and depth minimum) with good drainage. Tomatoes require full sun, so ensure you provide a space with 6–8 hours of sunlight per day. Keep the soil evenly moist but not waterlogged. Water at the base (rather than watering the leaves) to avoid disease. Unlike indeterminate tomatoes, determinate varieties (like the ones provided in our starter kits) don’t require pruning or extensive staking, however a tomato cage or short stake is beneficial.
Harvest
Determinate tomatoes typically mature 60–75 days after transplanting. Fruits will ripen over a 2–3 week period, often all at once. Harvest when tomatoes are fully colored and slightly soft to the touch. Regular picking ensures the best flavor and reduces chances of pests or rot.