Vegetable · Solanaceae
Bell Pepper
Capsicum annuum
Given strong sun, warm earth, and steady moisture, the plant hangs its thick-walled, glossy fruit heavy on the branch until frost ends the show.
Full sun
Every 3–7 days
59–86°F · 15–30°C
60–90 days
Overview
Bell peppers are the sweet, no-heat members of the nightshade family, carried on bushy plants hung with thick, crisp fruit that swells from glossy green into red, yellow, or orange as it ripens by variety. The same pepper wears each of those colors in turn, the skin tightening and brightening as the flesh thickens. The plants are slow to get going, then load a warm spot with fruit for weeks.
These are warm-season plants with no tolerance for cold. Their broad, smooth green leaves slow and dull in chilly soil, and a heat wave shakes the small flowers loose before they can set, so the aim is to time them into the steady warmth of early summer. With that window met, the branches hang heavy from midsummer to the first frost.
Once established, peppers are forgiving and ask for little. Even moisture, full sun, and a soil test before feeding cover most of what the plant needs. Let the watering wander and the smooth skin at the base of each fruit darkens into blossom-end rot, the one flaw that catches most growers.
Care
The short version: full sun, warm soil, and even moisture of about 1 to 2 inches of water a week, in rich, well-drained ground with a balanced feed worked in at planting time.
Light
Bell peppers need full sun, at least 6 to 8 hours of direct light a day. In shade the stems stretch thin and leggy and set little fruit, and the sparse leaves no longer drape the shade that the developing peppers depend on.
Water
Aim for steady, even moisture of about 1 to 2 inches (2.5 to 5 cm) a week. Letting the soil bake hard and then flooding it is what darkens the smooth blossom end into rot. A layer of mulch holds the moisture and steadies the soil temperature.
Soil
Plant in rich, well-drained loam worked through with plenty of organic matter. Peppers favor a slightly acidic pH of 6.0 to 6.8, so a soil test before planting is worth the trouble.
Temperature
Peppers thrive between 59°F and 86°F (15°C to 30°C). The small flowers drop when days push past the high end or nights dip below it, and cold soil leaves the plants sullen and stalled.
Humidity
Ordinary outdoor humidity suits them, so there is no number to chase. What matters more is room for air to move between plants, which dries the broad leaves and keeps disease off them.
Feeding
Work a balanced fertilizer such as 10-10-10 into the bed at planting, guided by a soil test, then add a light nitrogen sidedress once the first fruits set. Too much nitrogen swells the leaves and stems while the fruit lags behind.
Pruning
Pruning is mostly unnecessary. Pinch off the very first flowers on small transplants so the stems thicken before they fruit, and stake or cage the plant so a heavy crop does not snap a brittle branch.
Repotting
Garden peppers are not repotted, but seedlings benefit from one move up. Shift them from their cell trays into 8 to 10 cm pots before they go outside, giving the fine roots room so they never start circling the wall.
Size & spacing
The bushy plants stand 18 to 35 inches (45 to 90 cm) tall and spread their leafy branches 12 to 24 inches (30 to 60 cm) across. Give each one that room so air moves through the foliage and the leaves dry fast.
When to plant
Bell peppers run on warmth and have no patience for frost or cold ground. Start the seeds indoors in late winter, set the young plants out a few weeks after the last frost once the soil has warmed, and pick fruit from midsummer until the first fall frost.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 8-10 weeks before the last spring frost
- Plant: 2-3 weeks after the last frost, once soil has warmed to about 18°C (65°F) and nights stay above 13°C (55°F)
- Harvest: Harvest from midsummer until first fall frost; pick green at full size and firm, or leave fruit on the plant to ripen red, yellow, or orange
Hardiness
USDA hardiness zones: 9–11
Temperature: down to -7°C
Troubleshooting
Most pepper trouble shows on the fruit, where uneven water and harsh sun mark the smooth skin, or on the tender new growth that draws pests to its undersides. Spot the change early and a small problem stays small. Match what you see below, then act while it still helps.
Fruit tip collapsing into a dark, leathery scar
That dark, leathery patch sinking into the very tip of the fruit is blossom-end rot, and it traces to uneven watering rather than weak soil. When the ground lurches from dry to soaked, the plant cannot draw enough calcium into the swelling pepper. Hold a steady supply of about 2.5 to 5 cm a week, mulch to keep it even, and pick off any fruit that already shows the sunken mark.
Fix:
- Remove affected fruit so the plant redirects energy
- Water deeply and consistently, about 2.5-5 cm per week
- Apply organic mulch to even out soil moisture
Flowers drop without setting fruit
When the small white blossoms loosen and fall before any fruit forms, heat or chill is to blame, since peppers stop setting once days climb past 90°F (32°C) or nights sink below 59°F (15°C). Keep the watering even and hold back the nitrogen for the moment. Fruit set picks up again on its own once the weather levels into a milder stretch.
Fix:
- Keep plants evenly watered through hot spells
- Wait for moderate temperatures; fruit set usually resumes on its own
- Reduce supplemental nitrogen
Twisted, glistening new leaves with clusters of tiny pests below
Those tiny soft-bodied specks crowding the curled shoot tips are aphids, and the glassy shine smeared across the leaves is honeydew that later darkens into sooty mold. A hard jet of water knocks the clusters loose, and insecticidal soap worked into the leaf undersides clears the holdouts. Lady beetles and lacewings pick steadily at the colony, so leave those hunters in place where you can.
Fix:
- Dislodge aphids with a strong spray of water
- Apply insecticidal soap or horticultural oil, covering leaf undersides
- Preserve natural enemies such as lady beetles and lacewings
Blistered, bleached skin where sunlight strikes the pepper
Those whitish, papery blisters drawn tight across the skin are sunscald, struck into fruit that grew shaded and then bakes in full sun once the leaves above it thin. The mark lands only on the side turned toward the sun. Slice the blistered skin away and the firm flesh underneath is still good to eat, so the lasting cure is keeping the leaf cover that shades the crop.
Fix:
- Harvest affected fruit promptly; undamaged portions are still edible
- Manage leaf-spotting diseases to preserve foliage cover
Toxicity
Good news for a household with pets: the whole bell pepper plant is safe. The sweet cultivars carry little to no capsaicin, and the ASPCA does not list the plant as toxic to cats or dogs. The fruit is an everyday vegetable, and a stray nibble of leaf does no harm.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Sweet bell pepper is safe for cats. A curious nibble of the glossy fruit does no harm, though a large mouthful of the leaves might bring a mild, passing stomach upset, as any new food can.
Dogs None
Dogs are fine around bell pepper. Many crunch happily through a slice of the firm, ripe fruit, and the plant holds no toxin to worry about.
Horses Safe
Nothing in a bell pepper plant can harm a horse. Most horses pass over the sharp-scented foliage on their own.
Rabbits Safe
Rabbits can eat sweet pepper safely, and a small piece of the crisp fruit makes a fine treat. Leave out the seeds and the stem, which they have no use for.
Livestock Safe
Cattle, goats, and sheep come to no harm from this plant, and surplus peppers are a harmless scrap to pass along.
Birds Safe
Pepper is no threat to birds, which shrug off the heat compounds that bother mammals. Backyard hens will peck eagerly at chopped fruit.
People Safe
For people the crisp, thick-walled fruit is simply food, eaten fresh or cooked with no safety concern for anyone in the house.
No special handling needed. As with other Solanaceae vegetables, the fruit is the part intended for eating; discourage pets from chewing large amounts of foliage or stems.
Varieties
A few sweet pepper cultivars appear again and again in home plots, each with its own fruit shape and ripening color. The names below are the reliable ones.
California Wonder
A classic open-pollinated heirloom with thick-walled, blocky four-lobed fruit that deepens from green to red.
King of the North
An open-pollinated favorite for short-season northern gardens, prized for coloring its fruit through to red reliably.
Big Bertha
A hybrid bearing extra-large, elongated bell fruit that stretches to about 18 cm (7 in) long.
Companions
Bell peppers do well beside herbs and alliums that share their conditions and help shrug off pests, but keep them away from fennel, which holds back almost everything planted near it.
Plant near
basil: Traditional companion listed on extension companion-planting charts; shares growing conditions and may help deter some insect pests.
onions: Listed as a compatible companion for peppers on extension companion-planting charts.
carrots: Listed as a compatible companion for peppers on extension companion-planting charts.
Keep apart
fennel: Extension companion-planting guidance lists fennel as incompatible with most garden vegetables, including peppers, because it inhibits neighboring plants.
How to propagate
Bell peppers start one way at home, from seed sown early indoors so the slow seedlings have time to size up before they go out.
SeedEasy
Sow indoors 8-10 weeks before the last spring frost · Germinates in about 7-14 days at 24-29°C (75-85°F); transplant-ready in 8-10 weeks
Peppers grow from the flat, pale seeds, sown indoors 8 to 10 weeks before the last spring frost. Germination drags and comes up patchy in cool soil, so a heat mat at 75°F to 85°F (24°C to 29°C) nudges the first green hooks through in 7 to 14 days. Direct sowing rarely works in temperate climates, since the seedlings need that head start to stand sturdy and transplant-ready in 8 to 10 weeks.
Myths
A red pepper and a green pepper can never come off the same plant.
They are one and the same fruit, caught at two points in its ripening. The green pepper is simply picked while still unripe, and most varieties carry on to a deep red, with some turning yellow or orange by cultivar. Left on the plant to color fully, the flesh also grows noticeably sweeter.