How many plants for a 10×10 bed at 12 inch spacing?
A 10 × 10 ft bed (100 square feet) planted 12 inches apart holds 100 plants on a square grid, which is 1.00 plants per sq ft. On a triangular, offset grid it fits about 116 plants.
How to work it out
- 10 ft × 10 ft = 100 sq ft
- each plant needs (12 in)² = 1 sq ft
- 100 sq ft ÷ 1 sq ft = 100 plants
Twelve inches is a common spacing for perennials like coneflower and daylily, and for many groundcovers. For a mass planting you want to fill in fast, the offset pattern is the better choice; for a vegetable-style grid you walk between, stick with squares.
Adjust for your project
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- Density
- 1.00 plants per sq ft
- Bed area
- 100 sq ft
- Keep the outer row about half a spacing in from the edge of the bed. The count assumes that layout.
Plants at 12 in spacing for a 10 ft wide bed, by bed length
| Bed length | Plants needed | Bed area |
|---|---|---|
| 4 ft | 40 plants | 40 sq ft |
| 6 ft | 60 plants | 60 sq ft |
| 8 ft | 80 plants | 80 sq ft |
| 10 ft | 100 plants | 100 sq ft |
| 12 ft | 120 plants | 120 sq ft |
| 16 ft | 160 plants | 160 sq ft |
What to know about planting a 10×10 bed at 12 in spacing
The count assumes the outer plants sit half a spacing (6 in) in from the edge, so the bed holds 10 rows of 10. The common mistake is counting like fence posts, with a plant on every edge line: that gives 11 rows of 11, or 121 plants, and the outer ring ends up hanging over the lawn or path within a season.
A hundred plants is five or six flats of 18, or a hundred 1-quart pots, and a lot of holes. Set every pot out on the bed in its grid before you dig any, then stand back and look: gaps and crooked rows are easy to fix while the plants are still in their pots. A string line or a 1 ft marked stick keeps the rows honest.
Most 10 × 10 beds are not one plant repeated. If you are mixing sizes, give the big plants their tag spacing first, then fill between them. For vegetables the square-foot method handles mixed sizes more neatly: compare how many plants fit in a 4×4 square foot garden. For a solid groundcover carpet, see how many groundcover plants for 200 sq ft at 8 inch spacing.
Different size? Use the full Plant Spacing Calculator.
What you’ll need
- Hori-hori garden knifeBudget price
A digging knife with depth marks — plants, weeds and divides in one tool.
See options on Amazon (opens in a new tab) - Mason’s line and stakesBudget price
A taut string line for straight rows, hedges and edging.
See options on Amazon (opens in a new tab) - Bulb-planting auger for a drillBudget price
Drills planting holes for bulbs, plugs and small pots in seconds with a cordless drill.
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Frequently asked questions
How many plants in a 10×10 bed on an offset grid at 12 inches?
About 116 plants (1.15 plants per sq ft): the offset rows sit closer together, so about 15% more plants fit.
How many plants for a 10×10 bed at 18 inch spacing?
About 45 plants on a square grid (0.44 plants per sq ft). Eighteen inches suits larger perennials and small shrubs.
How many plants for a 10×10 bed at 6 inch spacing?
400 plants on a square grid, four per square foot. Six inches is groundcover or bedding-plant spacing.
Other common sizes
Sources
- Washington State University Extension C132: Spacing of Landscape Plants (opens in a new tab) — Groundcover coverage by spacing (100 plants at 12 in ≈ 100 sq ft); hedge spacing; shrub distance from foundations
- University of Illinois Extension: Ground Covers (opens in a new tab) — Staggered/diamond pattern; spacing depends on growth rate and budget; 1–2 seasons to fill in