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Plant Spacing Calculator

Calculate how many plants you need based on area and plant spacing

m²
cm
🇩🇰 All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Calculate number of plants from spacing

Our plant spacing calculator helps you determine how many plants to buy to cover a specific area. Enter the area size and desired spacing between plants, and the calculator gives you the total number of plants and density per m².

Typical plant spacing

Plant spacing depends on the plant type and size. Ground cover plants are typically planted 20-30 cm apart, perennials 30-50 cm, and shrubs 80-150 cm. Vegetables vary widely – lettuce at 25-30 cm, tomatoes at 50-60 cm, and potatoes at 30-40 cm.

Grid planting

The calculator assumes a grid pattern where plants are placed in rows with equal spacing in both directions. Staggered planting (zigzag) can fit about 15% more plants per m² but requires more planning. Grid planting is the most common method for beds and vegetable gardens.

Planting tips

Always measure the area and mark planting positions before you start. Use a measuring stick or string to ensure uniform spacing. Buy 5-10% extra plants as reserves. Remember to water thoroughly after planting.

Frequently Asked Questions

How close should you plant ground cover plants?

Ground cover plants are typically planted 20-30 cm apart, equivalent to about 11-25 plants per m². Closer planting provides faster coverage but requires more plants. Most ground cover plants fully cover the area within 1-2 years at the correct spacing.

How do you calculate plants per m²?

Plants per m² = (100 ÷ spacing in cm)². For example: At 30 cm spacing = (100÷30)² = 3.33² = about 11 plants per m². At 20 cm spacing = (100÷20)² = 5² = 25 plants per m². Then multiply by total area for the total number.

Should you buy extra plants as reserves?

Yes, buying 5-10% extra plants as reserves is recommended. Some plants may die during or shortly after planting, and it's practical to have replacements ready. Especially for large projects, extra plants are cheaper than buying individual replacements later.

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