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Hedge Planting Calculator

Calculate plants per metre, trench dimensions, compost and mycorrhizal fungi for hedge planting. UK native and ornamental species.

Total hedge run

Include mycorrhizal fungi

Improves root establishment and growth


Your supplier's price per hedging plant

How We Calculate This

This calculator determines the number of hedge plants based on species-specific spacing rates for single or double-staggered rows. It also calculates trench dimensions, compost, mulch and optional mycorrhizal fungi.

The formula

Plants = Hedge length × Plants per metre (species-specific)
Trench volume = Length × Width × Depth
Compost bags = (Trench volume × 0.5) ÷ 0.04 m³ (40L bag)
Mulch bags = Length × (Width + 0.2m) × 0.075m depth ÷ 0.05 m³ (50L bag)

For a 20m beech hedge in a staggered double row: 20 × 6 = 120 plants, trench 0.4m wide × 0.3m deep = 2.4 m³. Backfilling with a 50/50 soil-compost mix uses about 1.2 m³ of compost = 30 bags (40L).

A staggered double row is two single rows, so the density doubles. The 6/m figure for standard species is the stock-proof density required for the gov.uk Countryside Stewardship BN11 hedge grant (33cm in-row, 40cm between rows).

Species spacing guide

  • Privet/Beech/Yew/Hornbeam/Hawthorn: 3/m (single, 33cm) or 6/m (staggered double)
  • Laurel/Leylandii: 2/m (single, ~60cm) or 4/m (double) — larger evergreens
  • Mixed native: 3/m (single) or 6/m (staggered double, stock-proof / BN11)

Frequently Asked Questions

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Last updated: March 2026

Verified against UK standards · estimates only, confirm with your supplier.