Landscaping
Ground Cover Calculator
Calculate how many ground cover plants you need based on area, spacing, and planting pattern. Supports square, triangular, and diamond planting layouts.
Inputs
Enter the other two values and we'll solve the missing one.
Choose a defined shape to enable the plant-free border/setback below. "Total area only" keeps the classic input.
Vigorous ground covers spread and overlap at maturity — an estimator often plants fewer than the pure geometric count.
Live estimate
Plants required
231 plants
- Coverage area
- 200 sq ft
- Spacing
- 12 in
- Plants per sq ft
- 1.15
Professional planting notes
- Triangular (offset) spacing gives ~15% more plants per square foot for the same on-center distance and fills in faster.
- Order 5–10% extra plants to replace losses in the first season.
- Prep soil to 6″ depth, top with 2″ mulch, and water deeply for the first 2–3 weeks.
Stage-by-stage plant count
- Gross bed area
- 200 sq ft
- Border setback
- Needs bed shape
- Exclusion zones
- None
- Net plantable area
- 200 sq ft
- On-center spacing / pattern
- 12 in · triangle
- Mature overlap
- None applied
- Final suggested plant count
- 231 plants
Every stage is a real, separately-controlled input. There is no hidden percentage adjustment — what you see above is exactly how the suggested count is built.
Estimator intelligence
- Calculated quantity
- 231 plants
- Spacing, overlap, and setbacks
- Informational
- Field allowance
- Not applied
- Quantity before ordering rule
- 231 plants
- Ordering rule
- Round up to whole plant
- Final suggested order
- 231 plants
Ground-cover counts depend on layout pattern, setbacks, exclusions, and mature-plant overlap — not a simple percentage.
Estimator confidence
LowerGround-cover counts depend on layout pattern, setbacks, exclusions, and mature-plant overlap — not a simple percentage.
Why this calculator uses this behavior: Setbacks and mature overlap are separate, user-controlled reductions. The suggested plant count reflects those choices; there is no additional 'behavior %' applied on top.
Why other adjustments are not applied: No settlement or swell — plants aren't a bulk material. Waste is handled as 'order 5–10% extra to replace first-season losses,' shown separately.
- Gross bed area — The raw shape is only the starting point.
- Border setback — Planting-free zones near paving and curbs reduce the plantable area.
- Exclusion zones — Hardscape islands, trees, and boulders are removed from planting area.
- On-center spacing — Spacing squared drives plants-per-square-foot.
- Layout pattern — Triangular spacing packs ~15% more plants at the same on-center.
- Mature overlap — Vigorous ground covers can be planted at fewer per sq ft than pure geometry suggests.
- Plan for a border setback near curbs, paving, and hardscape edges — most designs leave a 12–18 inch planting-free zone.
- Prep soil to 6 inches, top with 2 inches of mulch, and water deeply for the first 2–3 weeks after planting.
- Bare-root and plug-size plants change the plant count you need per square foot — confirm the size you're ordering.
- Forgetting an edge setback and ordering plants that will never actually get installed.
- Using a square grid on curved beds — the corners always come up short.
- Skipping mulch after planting — bare soil dries out and slows establishment.
Material assumptions
- Triangular spacing packs ~15% more plants per square foot than square spacing at the same on-center distance.
- Match spacing to species vigor — fast spreaders can go wider; slow spreaders should be planted tighter for quicker fill-in.
- Order 5–10% extra plants for edges, replacements, and irregular bed shapes.
Frequently asked questions
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These results are estimates only. Confirm quantities, compaction, waste, and delivery requirements with your supplier or project professional before ordering materials.