How Far Apart to Plant Tomatoes

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GardenSays

Your 8×4 ft raised bed fits 8 tomatoes at 21-inch spacing.

Between plants: 21 in
Grid: 4 × 2
Total plants: 8

Tomatoes grown staked need 18-24 inches between plants, and in a raised bed you can use that same spacing in both directions — no walking rows needed. At the 21-inch midpoint, that's 4 along the bed and 2 across — 8 plants.

Crowding is the most common spacing mistake: closer planting doesn't add yield, it adds shade, disease pressure, and small fruit. When in doubt, use the wider end of the range.

Why

✓Air circulation between mature plants is the cheapest disease prevention there is.
✓Roots spread wider than the plant looks in June — spacing is set for August size.

When this doesn't apply

→Determinate (bush) varieties stay smaller — the tight end of the range is fine; indeterminate vines want the wide end.
→Square-foot gardening compresses further than these numbers — it trades yield per plant for yield per bed and needs diligent feeding.

How this was calculated

1. In-row spacing21 in
Tomato (staked): 18-24 inches between plants (extension guidance); midpoint used
2. Intensive grid4 × 2 plants
Raised beds skip walking paths: plants sit on a 21×21 inch grid. 96÷21 along, 48÷21 across (edge margins included in the division)
3. Total8 plants
4 × 2

Data sources

University of Minnesota Extension — Growing tomatoes in home gardens — Space staked plants 18-24 inches apart, caged plants 24-36 inches, with rows 3-4 feet apart. (checked 2026-07-15)

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