How to Grow Bell Peppers: Timing, Spacing, Watering & Harvest

By the Garden Voila editorial team · Updated October 28, 2026 · How we verify

Peppers are slow, warm-loving plants, and they reward patience. They sulk in cool weather, drop their flowers in extreme heat and are slow to sprout from seed. Plant them at the right moment, keep the water steady and a handful of plants will give you bell peppers all summer. This guide uses advice from US university extension services, focused on sweet bell peppers, and covers choosing types, starting seed, timing, spacing, soil, feeding, watering, flower drop, pests, diseases, harvest and storage.

Bell pepper quick facts

Choose a type

Michigan State Extension describes a range of sweet types, including bell, banana, sweet cherry and Italian frying peppers, plus hot types. Oklahoma State Extension describes bell types as blocky, with three to four lobes, reaching harvest in 75 to 80 days from transplanting, while chile types take around 100 days to reach mature green fruit and 140 days to red ripe. Choose varieties that mature in your season: in cool or short-summer regions, early varieties of about 65 to 70 days are safer than late, large-fruited types. Maryland Extension notes that planting sweet peppers next to hot ones will not make the sweet ones hot, although saved seed from cross-pollinated plants can produce surprises the following year.

Bell peppers are usually picked green, but if left on the plant they ripen to red, yellow or orange, which takes longer and gives a sweeter pepper. Ripe peppers are higher in sugar and generally richer in vitamin C, but they also keep the plant producing for longer before the next flush of flowers, so a mix of green and fully colored fruit is a sensible compromise.

Starting seed and buying transplants

Michigan State Extension notes that peppers are usually grown from transplants, not direct-sown, and Oklahoma State agrees that transplants are preferred over direct seeding. Seed germinates slowly and needs warmth. If you start your own, sow about 8 to 10 weeks before your last freeze, in a warm spot; South Dakota State Extension suggests starting about 8 weeks before transplanting, from mid-March through mid-April in its region. Our seed starting calculator gives your date, and the seed tray planner works out seeds and trays. Greenhouse transplants need about 4 to 6 weeks from seeding, according to Oklahoma State, so these are the fastest route if you are late. Keep the seed mix at about 75 to 85°F for fast germination with a heat mat, and give seedlings strong light so they stay stocky.

If you buy plants, Maryland Extension says to avoid overgrown, stressed transplants, since they are slow to recover and can stall early in the season. Choose compact, dark green plants with healthy roots and no flowers or fruit already set; pinch off any early flowers so the plant puts energy into roots first.

When to plant peppers outdoors

Peppers need real warmth. Oklahoma State notes that they grow poorly at 40 to 60°F. Maryland Extension advises setting out transplants only after the soil has thoroughly warmed in spring, and warns against planting before the soil reaches about 65°F. In general that means a couple of weeks after your last freeze. South Dakota State Extension says to transplant once frost danger has passed and nighttime temperatures stay above 45°F, but Michigan State adds that cold nights, below 60°F, can cause blossom drop, so a very early planting may sit and sulk. Use the frost dates by ZIP code tool and the safe transplant date calculator (choose very tender) to find a safe window.

Warm the soil and harden off

• Black plastic mulch helps the soil warm, as Michigan State notes. South Dakota State also suggests black plastic or floating row covers early in the season.
• Row covers, wall-of-waters or hot caps protect against cool temperatures.
• Harden plants off for a week or so before planting. South Dakota State suggests reducing fertilizer and water a few days before planting, then gradually increasing sun exposure. Use the hardening off schedule.
• Add organic mulch later. In hot summer periods, straw or similar mulch keeps the soil cooler and moister. Avoid grass clippings if the lawn was treated with herbicide.

Spacing and soil

Michigan State Extension suggests 18 inches between plants in rows 24 inches or more apart. Maryland Extension gives 12 to 24 inches between plants and 30 to 36 inches between rows, and says double staggered rows work too. South Dakota State suggests 12 to 18 inches between plants. Plants are bushy and can reach 3 to 4 feet. Choose a spot with at least 8 hours of sun, well-drained, fertile soil, and add compost before planting. Oklahoma State gives the ideal pH as 6.0 to 6.8, with peppers tolerating down to 5.5, and recommends a soil test; lime acidic soils. Avoid beds where peppers, tomatoes, eggplant or potatoes grew in the previous year or two, because of shared diseases.

For containers, Maryland Extension suggests at least 5 gallons per plant; the grow bag volume calculator helps you check. Count plants for your bed with the plant spacing calculator. A windbreak can improve growth and yield, as South Dakota State notes.

Watering

Uniform soil moisture is the goal, says Maryland Extension. Dry conditions cause blossom drop, small fruit and blossom end rot, the dark, sunken patch on the bottom of the fruit. It recommends drip irrigation or soaker hoses for peppers. Oklahoma State describes up to 1.5 inches of water every 7 to 10 days, adjusted for soil, plant size and weather, and warns that over-irrigation promotes Phytophthora and other root rots. South Dakota State suggests about an inch a week from rain or irrigation, soaking thoroughly but avoiding soggy soil, and checking soil moisture before watering. Mulching helps keep moisture even. See the soaker hose length calculator and the garden watering calculator.

Feeding

Peppers need steady but moderate fertility. South Dakota State recommends a starter fertilizer at transplanting and supplemental fertilizer after the first set of peppers forms, and notes that in most of its garden soils a nitrogen source is usually all that is needed. Oklahoma State describes a commercial program of nitrogen before planting and again when plants first fruit, based on a soil test. In containers with soilless media, use a full-spectrum fertilizer, such as a tomato fertilizer with calcium and magnesium as well as nitrogen, phosphorus and potassium. Compost or aged manure can make extra nutrients unnecessary. Too much nitrogen can give leafy plants with few fruit, so follow your soil test and label directions.

Why peppers drop flowers

Michigan State Extension lists three main triggers: night temperatures below 60°F, extreme heat of 90°F or above during flowering, and shortage of water at bloom time. Oklahoma State adds that fruit set above 85°F usually produces small, misshapen fruit, and that long dry spells cause flower and small fruit drop with a slow recovery. Fix what you can:

• Protect early plants on cold nights with row covers.
• Give afternoon shade during heat waves, using shade cloth.
• Keep the soil evenly moist, with mulch and drip irrigation.
• Avoid overfeeding with nitrogen.
• Be patient: most plants set a new crop of flowers once the weather moderates.

Common problems

• Slow early growth: usually cool conditions or stressed transplants (Maryland Extension).
• Blossom end rot: uneven watering. Keep the soil evenly moist. South Dakota State adds that in containers or raised beds with non-native soil, you should make sure the growing media contains a calcium source.
• Poor fruit set: temperature extremes or water stress.
• Sunscald: pale, papery patches on fruit exposed to hot sun after leaves are lost. Keep a healthy leaf canopy and shade plants in extreme heat.
• Cutworms: chew stems at the soil line. South Dakota State suggests cardboard collars around new transplants.
• Aphids: cluster on leaf undersides and leave sticky honeydew. Crush them by hand, hose them off or use insecticidal soap; ladybugs help.
• Root rot and damping off: avoid waterlogged soil and use clean pots and fresh mix for seedlings.
• Leaf and fruit spots: Oklahoma State lists anthracnose, Cercospora leaf spot, bacterial leaf spot and fruit rots. Use resistant cultivars and drip irrigation to reduce bacterial leaf spot, rotate crops and clean up debris.

Check leaves and fruit regularly and handpick pests. The pest identifier and our plant problem identifier can help you work out the cause.

Weeding and care through the season

Peppers have shallow roots, so cultivate very shallowly. Oklahoma State warns that deep cultivation prunes roots, slows growth, reduces yield and promotes blossom end rot. Mulch to suppress weeds, hand-weed close to plants and stake or cage tall plants loaded with fruit; branches are brittle and break easily under a heavy crop or strong wind. Keep an eye on the weather, watering more during heat waves and protecting plants if a late-season cold snap threatens unripe fruit.

Harvest

Maryland Extension says most sweet and hot peppers are ready 70 to 85 days after transplanting. Bell peppers may reach the mature green stage in 70 to 80 days and need another 2 to 3 weeks to ripen fully. Michigan State Extension says bell peppers are usually picked green once full-sized and firm, and that a plant can produce six to eight or more fruit. South Dakota State gives an average yield of about 80 fruit per 10-foot row. Cut peppers with pruners instead of pulling, which can snap branches. Picking regularly encourages more fruit. If you grow hot peppers, wear gloves when picking and keep them away from children and pets, and avoid touching your eyes, as Michigan State and South Dakota State warn.

Estimate your harvest date with the harvest date calculator.

Storage

Oklahoma State advises holding mature green peppers at 50 to 54°F and 90 to 95 percent relative humidity, with chilling injury occurring below 45°F and storage life of up to about two weeks under these conditions. At home, a cool, humid spot around 45°F, as South Dakota State suggests, works well, such as the crisper drawer in the refrigerator. Do not wash peppers before storing, which promotes rot; wipe them with a soft cloth instead. Peppers also freeze well after slicing, with no blanching needed for most cooking uses.

Common mistakes

• Planting too early into cold soil, which stunts plants for weeks.
• Letting the soil dry out and then flooding it, causing blossom end rot.
• Overfertilizing with nitrogen, giving big leafy plants and few peppers.
• Planting in the same bed as tomatoes, eggplant or potatoes year after year.
• Pulling fruit off by hand and snapping branches.
• Waiting for every pepper to turn red, which slows the plant’s production.

Sources and further reading

• Growing Peppers in the Home Garden, University of Maryland Extension
• How to Grow Peppers, Part 2, Michigan State University Extension
• Peppers in Your Garden, University of California Cooperative Extension
• Pepper Production, Oklahoma State University Extension
• Peppers: How to Grow It, South Dakota State University Extension

Frequently asked questions

Reviewed October 2026. Timing varies by region.

Photo: Jebulon, CC0, via Wikimedia Commons (resized)