Tomatoes are one of the most popular plants to grow in a pot, and one of the most common to grow in a pot that’s too small. A cramped pot dries out fast, stunts the plant, and cuts your harvest. Picking the right size takes two minutes.

Check the Plant Tag

Determinate (bush) tomatoes grow to a set size and ripen most of their fruit over a few weeks. Indeterminate (vining) tomatoes keep growing and producing until frost, often past six feet. The tag usually says which; “patio” or “dwarf” means compact.

How Big a Pot

• Patio and dwarf varieties: a 5-gallon pot is plenty.
• Determinate: at least 5 gallons; 7 to 10 is easier to keep watered.
• Indeterminate: at least 10 gallons; 15 to 20 if you have room.

One tomato per pot.

Bigger Is Easier

More soil holds more water. A small pot in summer heat can need water twice a day. When in doubt, size up.

Drainage Holes Aren’t Optional

Water has to escape, or the roots rot. If you use a bucket, drill several holes in the bottom.

Potting Mix, Not Garden Soil

Garden soil packs down in a pot and drains poorly. Potting mix stays light. Leave about an inch at the top so water doesn’t spill over.

Support and Sun

Put the stake or cage in at planting so you don’t damage roots later. Give the pot full sun, at least 6 to 8 hours a day.

Tomatoes are just one crop. My guide walks you through starting a vegetable garden in containers, step by step.

Get the full guide: How to Start a Vegetable Garden in Containers by Hank Palmer, on Amazon