You should space tomato plants based on what type you grow. Bush types need 18-24 inches between plants. Vining types need 24-36 inches for their best growth. Getting this right helps your plants stay healthy and give you more fruit all season long.
I packed my tomato plants too close together my first few years. My plants looked great early on but soon grew into a jungle. Leaves stayed wet for hours after rain and fungal disease spread through the whole bed. I lost half my crop to blight that year because air could not flow through the plants to dry them out.
Tomato plant spacing depends on whether your variety is determinate or not. Determinate tomatoes grow to a set size and then stop. They stay bushy and compact all season. These work fine with 18-24 inches between them. Most paste and patio tomatoes fall into this group.
Vining tomatoes keep growing all season until frost kills them. They can reach 8 feet tall or more on good supports. Give these plants 24-36 inches between them to prevent a tangled mess. Popular types like Better Boy and Cherokee Purple need this extra room to thrive in your garden.
For the tomato planting distance in metric, the standard 24 inch spacing works out to about 61 cm. Plan for 45-60 cm for your bush types and 60-90 cm for vining types. These numbers give your plants room to spread without wasting bed space in your garden.
Row spacing matters as much as plant spacing for your tomato garden layout. Leave 3-4 feet between your rows to walk through for watering and picking fruit. Tighter rows save space but make harvest a pain when plants get big. I learned to value those wide aisles in late summer when my plants were loaded with tomatoes.
Use stakes or cages to keep your plants upright and within their space. A sprawling tomato can take over twice the ground area you planned for it. Good supports let you grow more plants in the same bed by going vertical instead of sprawling across the ground.
Pruning your vining tomatoes helps you manage spacing too. Remove the suckers that grow in the joints between main stems and side branches. This keeps your plants focused on making fruit rather than leaves. Pruned plants stay in bounds better and dry faster after rain or watering.
Measure your spacing before you dig any holes in your bed. Mark your spots with sticks or small flags first. I like to lay out all my markers and step back to check the pattern before I plant anything. This catches mistakes early when they are easy to fix.
Your local climate affects the spacing you need too. Gardeners in humid areas need more space between plants for better airflow. Those in dry climates can sometimes squeeze plants a bit closer together. Watch how your plants perform and adjust your spacing next year based on what you observe.
Read the full article: 10 Essential Vegetable Garden Planning Steps
