Plants Calculator
Calculate how many plants are needed to fill a garden bed based on the area and recommended plant spacing.
Formula
Plants = Area (sq ft) ÷ (Spacing in ft)²
- Spacing is converted from inches to feet for the calculation.
- Result is rounded up to ensure full coverage.
- Buy 10–15% extra for losses and irregular edges.
50 sq ft bed, 12-inch spacing
Inputs
- Garden Bed Area: 50 sq ft
- Plant Spacing: 12 in
12 in = 1 ft. 1×1 = 1 sq ft per plant. 50 ÷ 1 = 50 plants.
Frequently asked questions
What spacing should I use?
Check the plant tag. Most perennials: 12–18 in; annuals: 6–12 in; large shrubs: 3–5 ft.
Can I plant closer for a fuller look?
Yes, but plants may crowd each other as they mature. Allow for mature size.