Tree Spacing Calculator

Tree spacing depends on mature tree size and planting purpose: Ornamental small trees (under 25 ft mature): 10-15 feet apart, Medium shade trees (25-50 ft): 20-40 feet apart, Large trees (50-80 ft): 40-60 feet apart, Very large trees (80+ ft): 60-100+ feet apart, Windbreaks/shelterbelts: 6-15 feet apart (closer for faster screening), Privacy screen: 6-12 feet apart for evergreens, 10-20 feet for deciduous. Rule of thumb: Spacing = 50-75% of mature canopy spread. Crowded trees compete for light, water, and nutrients, leading to poor growth, disease, and premature death. Always consider mature size, not current size!

Calculate using area and spacing requirements: Formula: Number of trees = Area (sq ft) ÷ (Spacing × Spacing). For rectangular grid: Trees = (Length ÷ Spacing + 1) × (Width ÷ Spacing + 1). For triangular/hexagonal spacing: Fits 15% more trees than rectangular. Example: 100ft × 100ft area (10,000 sq ft) with trees spaced 20ft apart: Grid pattern: (100÷20+1) × (100÷20+1) = 6 × 6 = 36 trees; Triangular pattern: ~41 trees. Remember: Subtract buildings, driveways, utility lines, and other obstacles from total area before calculating.

Minimum distance recommendations: From house foundation: Small trees (under 25 ft): 10-15 feet, Medium trees (25-50 ft): 15-25 feet, Large trees (50+ ft): 25-50+ feet, From underground utilities (water, gas, sewer): 10 feet minimum, 20+ feet preferred, From overhead power lines: Small trees only under lines (under 25 ft mature), Medium trees: 25-40 feet from lines, Large trees: 50+ feet from lines, From septic systems and drain fields: 30-50 feet (roots can infiltrate), From sidewalks and driveways: 5-10 feet (small trees), 15-25 feet (large trees). Always call 811 (USA) before digging to locate underground utilities.

Planting patterns affect density and aesthetics: Rectangular/Square grid: Easiest to plan and maintain, good for orchards and timber, Spacing = mature canopy diameter, Staggered/Triangular pattern: Fits 15% more trees, more natural appearance, better windbreaks, Vertical spacing = Spacing × 0.866 (√3/2), Alternating rows offset by half spacing, Double-row hedgerow: Two parallel rows staggered, 8-15 feet between rows, used for wildlife habitat and privacy, Clustered/Naturalistic: Groups of 3-5 trees with varying spacing, mimics natural forest, variable density. For windbreaks: 2-5 rows, staggered, with different species for diversity and resilience.