How far apart to plant peppers
Virginia Cooperative Extension and Colorado State University Extension space peppers 12 to 24 inches apart in the row, with rows 30 to 36 inches apart. In a raised bed, 15 to 18 inches each way works, and UC Master Gardeners' square foot guide gives 1 pepper per square foot. The calculator starts on 17 inches each way.
Bell peppers and hot peppers such as jalapeño, serrano and cayenne are spaced the same way in these sources.
How many pepper plants fit a raised bed
| Bed | 17 in, square | 17 in, triangular | Square foot method (1 per sq ft) |
|---|---|---|---|
| 4 × 4 ft | 4 | 6 | 16 |
| 4 × 8 ft | 10 | 15 | 32 |
| 3 × 6 ft | 8 | 7 | 18 |
| 4 × 12 ft | 16 | 23 | 48 |
Both spaced columns keep half a spacing clear along the bed edges, the way the calculator counts. Peppers show how much the pattern matters: in a 4 foot wide bed, staggered rows fit a third row where a square grid fits only two, so a 4 × 8 bed goes from 10 to 15 plants at the same distance between plants. In the narrow 3 × 6 bed the square grid happens to fit better. The square foot count is the tightest, at 12 inches apart.
In an in-ground row at 18 inches, 10 feet takes 6 plants and 25 feet takes 16.
Peppers in containers
Virginia Tech's container guide and Colorado State's GardenNotes #724 grow a bell pepper in a container of at least 2 gallons with 8 inches of soil, one plant per container. Use the potting soil calculator to fill the pots.
Bell or hot peppers?
Utah State University Extension lists both groups and grows them the same way:
- Bell and other sweet peppers: California Wonder, Big Bertha, Yolo Wonder.
- Hot peppers: Early Jalapeño, Serrano, Anaheim, Long Thin Cayenne, Habanero.
Sweet or hot, use the same numbers in the calculator.
Depth, timing and warmth
- Seed depth: 1/4 inch, started indoors 6 to 8 weeks before the last frost, with bottom heat; pepper seed comes up slowly in cool soil.
- Transplant: after the last frost, about 2 weeks later, once the soil is at least 60°F.
- Flowers drop when nights fall below 55°F or days climb above 90°F, so there is nothing to gain from setting plants out early.
The pepper seed starting dates give your windows by ZIP code, and how many pepper plants per person tells you how many to grow.
Using the calculator
The calculator opens on a 4 × 8 ft bed at 17 inches, square pattern. Switch to Triangular for more plants, Rows for in-ground planting, or Container for pots.