Plant Spacing Calculator

Proper spacing ensures each plant gets adequate light, air circulation, water, and nutrients. Overcrowded plants compete for resources, become stressed, and are more susceptible to disease. They also produce smaller yields. In containers, spacing is even more critical since root space is limited.

For leafy greens and herbs that you harvest continuously (lettuce, spinach, cilantro), closer spacing often works well - you harvest outer leaves regularly, preventing overcrowding. For fruiting plants like tomatoes and peppers, stick to recommended spacing for best production.

For rectangular containers like window boxes, divide the length by the spacing requirement to get plants per row, then consider if you have width for multiple rows. Example: A 24" window box with 6" spacing fits 4 plants in a row. If it's 8" wide, you could fit 2 rows offset for better coverage.

Yes! Always plan for mature plant size. Seedlings look small and lonely at first, but proper spacing prevents problems later. For aggressive spreaders like mint, consider growing them in separate containers regardless of calculated spacing.

Mixed plantings work great in larger containers (5+ gallons). Combine plants with different heights, root depths, and nutrient needs. Classic combos: tomato + basil + marigold; lettuce + radish + chives. Use our calculated spacing for each plant type and arrange by height (tall in center).

Raised beds follow square foot gardening principles. Divide your bed into 1-foot squares and plant according to spacing: 4" spacing = 9 per square, 6" = 4 per square, 12" = 1 per square, 18" = 1 per 2 squares, 24" = 1 per 4 squares. This is more efficient than row planting.