Why does plant spacing matter?

Proper spacing ensures each plant gets enough sunlight, water, and nutrients. Overcrowding leads to poor yields, increased disease risk, and competition for resources.

What is the difference between row spacing and plant spacing?

Row spacing is the distance between parallel rows of plants, while plant spacing (also called in-row spacing) is the distance between individual plants within the same row. Both are needed to calculate total seed count.

How do I calculate how many seeds I need?

Divide your garden length by the plant spacing to get plants per row, then divide the garden width by the row spacing to get the number of rows. Multiply these two numbers to get the total plant count. Add 10–20% extra seeds to account for germination failures.

Can I use this calculator for raised beds?

Yes. Enter the total surface area of your raised bed in square feet. The spacing recommendations apply equally to raised beds and in-ground gardens.

What if I want to use square-foot gardening?

Square-foot gardening uses a fixed 1 ft × 1 ft grid. The number of plants per square foot varies by plant size — for example, 1 tomato per square foot vs. 16 carrots per square foot. This calculator uses traditional row spacing, which is compatible with most garden layouts.

Seed Spacing Calculator

Calculate recommended row spacing, plant spacing, and total seed count for your garden.

Plant / Vegetable

Garden Area (sq ft)

How to Use

Select the vegetable or plant you want to grow from the dropdown list.
Enter your garden area in square feet.
Click Calculate to see the recommended row spacing, plant spacing, and total seed count.
Use the results to lay out your rows and mark planting spots before sowing.

Frequently Asked Questions

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