Seed Spacing Chart: How Far Apart to Plant Vegetables

Is 61 plants the right count for a 10-foot row of carrots?

On the defaults — carrots, 2 inches apart in rows 12 inches apart, a 10-foot row — the row holds 61 plants, a 4-foot bed holds 5 rows, and the bed holds 305 plants in total. Seed packets list spacing because crowded plants compete for light, water and nutrients and yield less — the standard rule is to thin seedlings to the packet spacing once they sprout. Rows are spaced wider than plants so you can walk and kneel between them to weed and pick, and a 4-foot-wide bed is the usual raised-bed width because you can reach the middle from either side without stepping in.

Five things about the model are worth stating plainly. First, the row length in inches is the feet times 12 — 10 feet is 120 inches. Second, the plants per row is the floor of the inches divided by the spacing, plus one — floor(120 ÷ 2) + 1 = 61, and the +1 counts a plant at each end of the row. Third, the rows in a 4-foot bed is the floor of 48 divided by the row spacing, plus one — floor(48 ÷ 12) + 1 = 5. Fourth, the total plants is the plants per row times the rows — 61 × 5 = 305. And fifth, a row one inch short of the next plant does not count it — the floor is the rule; all listed in Accuracy & limitations.

The seed spacing chart

The worked example, line by line

Setup: Carrots, 2 inches apart, rows 12 inches apart, a 10-foot row, a 4-foot bed.

Line 1 — the row in inches. 10 feet × 12 = 120 inches.

Line 2 — the plants per row. floor(120 ÷ 2) + 1 = 60 + 1 = 61 plants.

Line 3 — the rows in the bed. floor(48 ÷ 12) + 1 = 4 + 1 = 5 rows.

Line 4 — the total. 61 × 5 = 305 plants.

Line 5 — the check. A 20-foot row holds 121 plants per row and 605 in total — doubling the row doubles the plants per row, and the bed still holds 5 rows.

Every branch, checked

Tomatoes, 10 ft: 6 plants per row; 2 rows; 12 plants in total — Tomatoes go 24 inches apart, so a 10-foot row holds only 6 plants — and the rows are 36 inches apart, so a 4-foot bed holds just 2 rows.

Lettuce (leaf), 10 ft: 21 plants per row; 5 rows; 105 plants in total — Leaf lettuce goes 6 inches apart, so a 10-foot row holds 21 plants, and the rows are 12 inches apart, so the bed holds 5 rows — 105 plants in total.

Carrots, 20 ft: 121 plants per row; 5 rows; 605 plants in total — Doubling the row to 20 feet doubles the plants per row to 121 — the +1 plant at the end of the row is the same, so the count scales with the length.

Zucchini, 10 ft: 4 plants per row; 2 rows; 8 plants in total — Zucchini goes 36 inches apart in rows 48 inches apart, so a 10-foot row holds 4 plants and a 4-foot bed holds 2 rows — 8 plants in total. Zucchini needs room.

Cucumbers, 10 ft: 11 plants per row; 2 rows; 22 plants in total — Cucumbers go 12 inches apart, so a 10-foot row holds 11 plants, and the rows are 48 inches apart, so the bed holds 2 rows — 22 plants in total.

Peppers, 10 ft: 7 plants per row; 3 rows; 21 plants in total — Peppers go 18 inches apart, so a 10-foot row holds 7 plants, and the rows are 24 inches apart, so the bed holds 3 rows — 21 plants in total.

Carrots, 5 ft: 31 plants per row; 5 rows; 155 plants in total — Halving the row to 5 feet halves the plants per row to 31 — the bed still holds 5 rows, so the total is 155 carrot plants.

The reverses, worked backwards

Smallest whole-foot row for at least 100 carrot plants in one row: At the displayed 17 ft the figures are 103 plants in the row. At the displayed 17 ft the row holds 103 plants. At 16 ft the row holds only 97 plants — below 100, so 17 ft is the smallest whole-foot row for at least 100 carrot plants in one row.

Smallest whole-foot row for at least 10 tomato plants in one row: At the displayed 18 ft the figures are 10 plants in the row. At the displayed 18 ft the row holds 10 plants. At 17 ft the row holds only 9 plants — below 10, so 18 ft is the smallest whole-foot row for at least 10 tomato plants in one row.

Largest whole-foot row for at most 50 carrot plants in one row: At the displayed 8 ft the figures are 49 plants in the row. At the displayed 8 ft the row holds 49 plants. At 9 ft the row holds 55 plants — over 50, so 8 ft is the largest whole-foot row for the count to stay at or below 50.

Smallest whole-foot row for at least 50 lettuce plants in one row: At the displayed 25 ft the figures are 51 plants in the row. At the displayed 25 ft the row holds 51 plants. At 24 ft the row holds only 49 plants — below 50, so 25 ft is the smallest whole-foot row for at least 50 lettuce plants in one row.

Smallest whole-foot row for at least 200 total carrot plants in the 4-ft bed (5 rows): At the displayed 7 ft the figures are 215 plants in total (43 per row × 5 rows). At the displayed 7 ft the bed holds 215 plants in total (43 per row × 5 rows). At 6 ft the bed holds only 185 plants — below 200, so 7 ft is the smallest whole-foot row for at least 200 total carrot plants in the 4-ft bed.

Smallest whole-foot row for at least 20 pepper plants in one row: At the displayed 29 ft the figures are 20 plants in the row. At the displayed 29 ft the row holds 20 plants. At 28 ft the row holds only 19 plants — below 20, so 29 ft is the smallest whole-foot row for at least 20 pepper plants in one row.

What the defaults assume

The defaults are Carrots, 2 inches apart in rows 12 inches apart, a 10-foot row — Carrots — 2 in apart, rows 12 in apart; a 10-ft row holds 61 plants; a 4-ft bed holds 5 rows; 305 plants in total. With Tomatoes, 10 ft, 6 plants per row; 2 rows; 12 plants in total. With Lettuce (leaf), 10 ft, 21 plants per row; 5 rows; 105 plants in total. With Carrots, 20 ft, 121 plants per row; 5 rows; 605 plants in total. With Zucchini, 10 ft, 4 plants per row; 2 rows; 8 plants in total. With Cucumbers, 10 ft, 11 plants per row; 2 rows; 22 plants in total. With Peppers, 10 ft, 7 plants per row; 3 rows; 21 plants in total. With Carrots, 5 ft, 31 plants per row; 5 rows; 155 plants in total. With Carrots, 0 ft row, 1 plant per row; 5 plants in total — the plant at the start still counts. With Carrots, 100 ft row, 601 plants per row; 3,005 plants in total. With Tomatoes, 1 ft row, 1 plant per row; 2 plants in total. With Zucchini, 100 ft row, 34 plants per row; 68 plants in total. With Corn, 10 ft, 11 plants per row; 2 rows; 22 plants in total. With Peas, 10 ft, 61 plants per row; 3 rows; 183 plants in total. With Beets, 10 ft, 41 plants per row; 5 rows; 205 plants in total.

Carrots, 0 ft row: 1 plant per row; 5 plants in total.

Carrots, 100 ft row: 601 plants per row; 3,005 plants in total.

Tomatoes, 1 ft row: 1 plant per row; 2 plants in total.

Zucchini, 100 ft row: 34 plants per row; 68 plants in total.

Corn, 10 ft: 11 plants per row; 2 rows; 22 plants in total.

Peas, 10 ft: 61 plants per row; 3 rows; 183 plants in total.

Beets, 10 ft: 41 plants per row; 5 rows; 205 plants in total.

Output · formula · meaning

Who uses this

• The gardener sowing carrots in a 10-foot row: they learn the row holds 61 plants and the bed holds 305 — and they check the 17 ft reverse to see the row that holds 100 plants.
• The gardener fitting tomatoes into a 4-foot bed: they learn a 10-foot row holds 6 plants and the bed holds 12 — and they check the 18 ft reverse to see the row that holds 10 tomato plants.
• The gardener counting a 200-plant carrot bed: they learn a 7-foot row is enough for 215 plants in total — and they check the 8 ft reverse to see the longest row that stays at or below 50 plants.
• The gardener spacing zucchini: they learn a 10-foot row holds 4 plants and the bed holds 8 — and they check the 100 ft edge to see that even a 100-foot row holds only 34 zucchini plants.

Accuracy & limitations

The math is first-principles: plants per row is the floor of the row length in inches divided by the spacing between plants, plus one — the +1 counts a plant at each end of the row; rows in a 4-foot bed is the floor of 48 divided by the spacing between rows, plus one, same convention; the total is the plants per row times the rows. A row one inch short of the next plant does not count it — the floor is the rule. What the model cannot do is guarantee germination: the days to sprout are ranges, and not every seed sprouts, so sow a few extra and thin to the packet spacing once they sprout; the chart is for direct sowing in the ground or a raised bed, not for transplanting seedlings, which are spaced by the mature plant size; and the 4-foot bed assumes you can reach the middle from either side without stepping in. Use it to count the row — then follow the packet for the sowing date.

Frequently asked questions