Pepper Plant Spacing, 18 Inches Apart in Rows and Beds

On this page

1. 1How far apart should you plant peppers?
2. 2Which gap should you pick?
3. 3Can you plant peppers closer together?
4. 4How do you space peppers in a raised bed?
5. 5How many pepper plants fit in a square foot?
6. 6Does wider spacing keep pepper leaves healthier?
7. 7What goes wrong when the spacing is off?
8. 8How tall do pepper plants grow?
9. 9Does closer spacing give you more peppers?
10. 10How far apart should different pepper varieties be?
11. 11What about peppers in pots?
12. 12Marking out your row
13. 13Sources

How far apart should you plant peppers?

Plant your peppers about 18 inches apart, in rows 30 to 36 inches apart. That is UMN Extension's figure¹, and most other extension guides land within a few inches of it. The table shows each one, so you can pick the source closest to your climate.

Pepper spacing in home gardens, as published by each extension service

Between plants	Between rows	Notes
18 inches	30–36 inches	Closer if temperatures run below 60°F 1
12–24 inches	30–36 inches	Double staggered rows in 2-foot beds also work well 2
12–18 inches	24–30 inches	3
18 inches	18–24 inches	Transplants 4
12 inches; pimentos 18–24 inches	3 feet; pimentos 42 inches	5
8–14 inches	Rows 24–30 inches wide	Transplants in home gardens 6
18–24 inches	3–5 feet	Transplants; seeded plants thinned to 2 feet 7
9–15 inches (8–13 plants per 10 feet)	15 inches minimum	Rows can shrink or go if plants are spaced right 8

Eighteen inches between plants is the one figure most of the eight guides allow, so start there unless you have a reason to move. UF/IFAS Gardening Solutions adds that the right gap depends on the variety, so check your seed packet too⁹.

The spread has a pattern you can use. The tightest gaps come from New Mexico and Florida, where long, hot seasons and small-podded chiles are common, and the widest from California, where UC IPM grows plants in rows 3 to 5 feet apart⁷. Your own bed sits somewhere in between.

How many pepper plants fit in a row?

Divide your row length by the gap. UF/IFAS counts plants per 10 feet of row the same way: 8 to 13 plants at 9 to 15 inches⁸.

Pepper plants per 10-foot row, worked from the gap

Gap between plants	Plants per 10 feet	How we got it
12 inches	10	120 ÷ 12 = 10
18 inches	6	120 ÷ 18 = 6.7, rounded down
24 inches	5	120 ÷ 24 = 5

So a flat of six transplants fills one 10-foot row at 18 inches, and a 12-foot row takes eight (144 ÷ 18 = 8).

Which gap should you pick?

Ask yourself three questions about your garden, in this order. The tree below gives the gap each answer leads to.

Your pepper bedStart from 18 inches

• Summers below about 60°F?UMN plants closer in cool weather
  • yes
    Go closer, feed moreFertilizer at planting and again in summer
• A narrow raised bed?About 2 feet wide
  • yes
    Two staggered rows12–24 inches apart in each row (UMD)
• A tall type?Serrano, tabasco, Thai chili, superhots
  • yes
    24 inches and a cageThe wide end of UMD's range
• none of these
  18 inches, rows 30–36 inchesUMN's figure

^{3 sources}Sources for this line1. University of Minnesota Extension2. University of Maryland Extension10. University of Florida IFAS Extension

Small and compact varieties let you go the other way. UC IPM says peppers suit a small garden if you grow compact varieties⁷, and ornamental peppers stay at 10 to 20 inches tall⁹, so the 12-inch end of the range fits them.

Clemson is one of the few guides that sizes the gap to the plant. It gives most peppers 12 inches in rows 3 feet apart, but pimentos 18 to 24 inches in rows 42 inches apart⁵. If your seed packet says the plant spreads wide, follow the packet over any general figure.

Can you plant peppers closer together?

Yes, in a cool summer, if you feed them for it. UMN Extension says to set plants closer together when temperatures run below 60°F, and notes that closer spacing calls for fertilizer at planting and again during the summer¹. The light side-dressings in the fertilizer guide cover that second feed.

Leaf cover matters at any spacing. Sunscald hits pods on small plants and under gaps in the leaf canopy, leaving flat tan patches¹, so plants set so far apart that they stay sparse leave more fruit in the sun. Utah State also ties sunscald to fruit exposed to hot, dry sun and keeps good leaf cover to prevent it⁴.

How do you space peppers in a raised bed?

Run two staggered rows down a bed about 2 feet wide. UMD Extension says double, staggered rows in 2-foot beds work very well²; each plant sits across from a gap in the other row, so your plants get room without a wide path between them.

1Bed about 2 feet wide, two staggered rows²212–24 inches between plants in each row²3Organic mulch once the soil passes 75°F⁴

1. Bed about 2 feet wide, two staggered rows²
2. 12–24 inches between plants in each row²
3. Organic mulch once the soil passes 75°F⁴

A worked 4-by-8 bed

Many home beds measure 4 by 8 feet, which is 48 by 96 inches. Utah State sets transplants 18 inches apart in rows 18 to 24 inches apart⁴. Two rows 24 inches apart, each 12 inches in from the long edges, fit across the 48 inches.

Along the 96 inches, plants at 18 inches give 5 per row (96 ÷ 18 = 5.3, rounded down). That makes 10 plants in the bed. Stagger the second row by 9 inches and each plant faces a gap, the same zigzag UMD uses in its narrow beds².

How many pepper plants fit in a square foot?

One. The University of Wisconsin-Madison Extension notes on square foot gardening list peppers at 1 plant per square, and they tell you to set a bell pepper in the center of its 1-foot square¹¹. That is far tighter than the row figures above, so check what each method gives one plant:

Floor space each pepper gets, worked from the published gaps (gap between plants times gap between rows)

Method	Layout	Square feet per plant
Square foot bed11	12 × 12 inches	1.0
Utah State rows4	18 × 18–24 inches	2.25–3.0
UMN rows1	18 × 30–36 inches	3.75–4.5
UC IPM rows7	18–24 × 36–60 inches	4.5–10

Put that on the 4-by-8 bed above and the difference shows. At 32 square feet, a square-foot layout holds 32 plants, and Utah State's rows hold 10. The UF/IFAS yield figure we used earlier, about 5 pounds from 10 feet of row, gives you no sign that 3 times the plants give 3 times the pounds⁸.

So should you copy the square-foot grid? Only with a plan to feed and water for it. UMN pairs closer spacing with fertilizer at planting and again in summer¹, and the Wisconsin notes say fruit crops such as peppers like deep, less frequent watering, not light daily sprinkles¹¹. In a bed you can reach from both sides, the grid works. In a bed with a tall type like a serrano, give the plant two squares and a cage.

Does wider spacing keep pepper leaves healthier?

It helps, because dry leaves get sick less often, but no extension guide we read puts a number on it. The University of Kentucky plant pathology team tells growers to space plants for maximum air circulation, to prune to keep air moving through the canopy in early summer, and to rotate out of peppers for at least 3 years¹². It also says to stay out of the planting when the foliage is wet, because you carry disease on your hands and tools¹².

Here is what that means in your garden:

Keep the sunscald trade in mind. Wide gaps and heavy pruning open the canopy and leave pods in the sun¹, so in a hot, dry climate you keep the leaves and in a damp one you open the center a little.

What goes wrong when the spacing is off?

You see it by midsummer, in your pods and in your paths. Here are the signs and what each one tells you about next year's gap.

• Pale, tan, flat patches on the sunny side of pods. That is sunscald, and it hits fruit under gaps in the leaf cover¹. Your plants sit too far apart, or they stayed small; next year close the gap a few inches.
• Tall plants leaning or splitting under fruit. Pepper stems turn brittle, and UMD supports the plants with cages or short trellises². A crowded row leaves you no room to add a cage once the plants are big, so staking belongs at planting time.
• Plants in a cool garden that never fill the row. UMN plants closer when temperatures run below 60°F¹; your 24-inch gap may be too wide for your summer.
• Peppers struggling where tomatoes grew last year. That one is a spot problem, not a gap problem. UMN keeps peppers off ground that grew tomatoes, potatoes, peppers, eggplants or tomatillos for three or four years¹.

Pepper Geek shows what happens when pepper plants stand too close together, which gives you a grower's view of the crowding problems above before you mark out your own row.

How tall do pepper plants grow?

Most of the peppers you grow will reach 2 to 4 feet tall. UMD Extension says peppers grow on bushy plants that can reach 3 to 4 feet, with stems that turn brittle, so it supports them with cages or short trellises². Penn State gives a wider range for peppers in general, 1.6 to 4.9 feet³, and some chiles go much taller where the season never ends.

Pepper plant heights as published, by type

Pepper	Height	Where the figure comes from
Peppers in general	Up to 3–4 feet	UMD Extension, Maryland gardens 2
Peppers in general	1.6–4.9 feet	Penn State PlantVillage 3
Jalapeño ('Early Jalapeño')	Taller than 24 inches	The seed seller, for its own variety 14
Cayenne	2–4 feet	UF/IFAS, Miami-Dade plantings 10
Serrano	Up to 5 feet	UF/IFAS, Miami-Dade plantings 10
Tabasco	About 60 inches	UF/IFAS, Miami-Dade plantings 10
Thai chili	Up to 6 feet, as a perennial	UF/IFAS, Miami-Dade plantings 10
Carolina Reaper	36–48 inches	The seed seller, for its own seed 15
Ornamental peppers	10–20 inches	UF/IFAS Gardening Solutions 9

The Florida heights come from plants that keep growing through a frost-free year, so a summer-only garden farther north usually ends shorter. Give the tall types the wide end of the range, 24 inches, and a cage at planting time, before the roots fill the spot.

How tall does a jalapeño grow? No extension page read for this guide gives a figure, but the seed seller puts its Early Jalapeño at over 24 inches¹⁴, inside the general pepper ranges above, so 18 inches apart suits it. The guide to growing jalapeños covers that plant's own size and season.

Superhots sit at the tall end. If you grow one, the Carolina Reaper plan works from seller heights of 36 to 48 inches and up to 5 feet¹⁵, so you give each plant 24 inches and a stake from the first day.

Does closer spacing give you more peppers?

Per row, a little; per plant, no, and your wallet notices the difference first. UF/IFAS expects about 5 pounds from 10 feet of row at 8 to 13 plants⁸, and UMD gives 2 to 8 pounds per 10-foot row². Neither guide promises you more pounds for more plants.

Work out the UF/IFAS figure per plant and you get about 0.4 to 0.6 pounds each (5 ÷ 13 to 5 ÷ 8). Plant the same row at 18 inches with 6 plants, and each one has more room to carry its share. You save money on transplants and lose little or nothing in the harvest, which is why we treat 18 inches as the default.

How far apart should different pepper varieties be?

Next to each other is fine for eating. The distance matters only if you save seed. Maryland says peppers are largely self-fertile, but insects carry pollen between plants, so seed saved from year to year can come out different².

To keep seed true, Maryland screens plants from insects or separates varieties by 500 feet². In a home garden that distance is rarely possible, so you bag a few flower buds on the plant you want seed from before they open. The pods on your sweet bell will not turn hot from a habanero next door this year; only the seeds inside carry the cross. Next year's plants grown from those seeds are where you would see it, in pod shape, color or heat.

What about peppers in pots?

In a pot, the pot does the spacing. UMD Extension sets 5 gallons as the minimum container for a pepper², and UW–Madison adds a depth of 12 to 18 inches¹⁶. One plant per pot is the rule both use.

Your pots still need space between them. Set them far enough apart that the leaves do not shade each other's pods, for the same sunscald reason as in the ground¹. The hub on growing peppers in pots covers depth, mix and watering.

Marking out your row

Mark the spots before the plants leave their pots, so you are not guessing with a root ball in your hand.

1. 1

   Pick a fresh spot

   Choose ground that has not grown tomatoes, potatoes, peppers, eggplants or tomatillos for three or four years.¹

2. 2

   Measure the rows

   Set rows 30 to 36 inches apart, or plan two staggered rows in a 2-foot bed.¹²

3. 3

   Mark each plant

   Push a stake or stick in every 18 inches along the row.¹

4. 4

   Add cages for the tall types

   Set cages or short trellises now; pepper stems turn brittle as they grow.²

5. 5

   Dig and plant

   Dig each hole the size of the root ball, set the plant at its old depth, firm the soil and water it in.¹

Your plants will fill the gaps by midsummer. If you are still waiting on warm soil, the planting date guide gives the day to aim for, and the first feed comes about 4 weeks after the plants go in⁴.