Choose a large container with drainage holes
Use a pot at least 5 gallons for smaller varieties
Use a 10 to 20 gallon container for larger plants
Fill with high-quality potting mix
Avoid garden soil in containers
Select a tomato variety suited for containers
Plant one tomato per container
Set the plant deep enough to cover part of the stem
Place the container in full sun
Water consistently to keep soil evenly moist
Water at the base of the plant
Mulch the soil surface to reduce drying
Feed with a balanced or tomato-specific fertilizer
Support the plant with a stake, cage, or trellis
Remove yellowing or damaged leaves
Pinch off suckers if needed for shape and airflow
Check regularly for pests and diseases
Harvest tomatoes when fully colored and ripe