Sweet pepper

Sun

Full sun, ideally at least 6-8 hours daily; light afternoon shade helps in very hot climates.

Water

Keep the root zone evenly moist but not waterlogged. Water deeply when the surface begins to dry; containers may need daily watering in hot weather.

Soil

Fertile, moisture-retentive but well-drained soil, ideally pH 6.0-7.0; use good-quality potting mix in containers.

Height

1.5-3 ft (0.45-0.9 m)

Spread

1-2 ft (0.3-0.6 m)

Flowers

Small white flowers from late spring through summer, followed by fruit.

Foliage

Smooth, pointed, oval green leaves on branching stems.

Growth

Moderate; growth slows markedly in cool weather.

Care needed

Medium

• Plant out after frost risk has passed, once soil is warm and nights are consistently above 54°F (12°C); harden plants off first.
• Keep moisture steady, watering the soil rather than routinely wetting the foliage.
• Apply a balanced fertiliser at planting, then feed container plants with a tomato fertiliser according to its label once fruits start setting.
• Mulch after the soil warms, keeping mulch clear of the stem.
• Support heavily laden branches with short stakes or a small cage.
• Use a container at least 12 in (30 cm) wide and deep, with drainage holes, for each compact plant.

Pruning. Routine pruning is unnecessary. Remove damaged or diseased growth, and cut ripe fruits off with scissors rather than pulling them from brittle branches.

Late winter

Sow indoors about 8-10 weeks before your expected last frost, keeping the seed mix at 70-85°F (21-29°C).

Early spring

Give seedlings strong light and pot them on when roots fill their containers.

Late spring

Harden off gradually and plant outside only when frost risk has passed and nights are reliably warm.

Early summer

Add supports and mulch; begin regular feeding as fruits form.

Summer

Check moisture frequently and harvest fruits green or allow them to reach their ripe colour.

Autumn

Pick remaining usable fruits before frost and remove plants when cropping ends.

• Plant in sunny potager beds with basil and parsley for a compact, productive display.
• Use matching containers on a warm patio, where ripening fruits provide strong colour.
• Arrange compact varieties along the front of raised vegetable beds for easy harvesting.
• Mix with French marigolds in edible borders, allowing enough space for airflow and access.

Garden styles it suits: Potager (kitchen garden), Edible landscape, Modern courtyard, Small-space, Homestead and Family-friendly.

Plant it with: Basil, Parsley, French marigold, Lettuce and Spring onion.

Wildlife: Flowers are self-fertile, but visiting bees can improve pollination. Slugs and snails may feed on seedlings and low-hanging fruits.

• Aphids cluster on soft shoots: inspect leaf undersides and wash colonies off with water; use insecticidal soap labelled for edible crops if needed.
• Slugs and snails damage young plants: check after dark, remove hiding places and use barriers or an approved bait where necessary.
• Blossom-end rot causes dark, sunken patches at the fruit tip: maintain even soil moisture and avoid excessive fertiliser; do not add calcium unless a soil test indicates a deficiency.
• Flowers drop or fruits fail to set in cold nights or extreme heat: use shelter in cool weather, provide light afternoon shade in severe heat and wait for temperatures to moderate.

Sweet pepper fruits are not known to be toxic to people, cats, dogs or horses, although large amounts can cause digestive upset. Leaves and stems are not food, and their safety as animal feed is not well established; prevent pets and horses from grazing on them. Hot-fruited peppers, including some plants sold as ornamental peppers, can cause substantial mouth, eye and skin irritation.

• Chilli pepper (Capsicum annuum)

  Many chillies belong to the same species, and fruit shape alone cannot reliably distinguish hot from sweet varieties. Use a known variety name or reliable plant label rather than tasting an unidentified pepper.

• Jerusalem cherry (Solanum pseudocapsicum)

  This ornamental bears small, round orange-red berries and flowers with conspicuous yellow anthers. Its fruits are poisonous; do not assume a small, colourful potted plant is an edible pepper.

The Latin species name annuum means annual, while sweet pepper distinguishes its mild fruits from hot peppers.

Propagation. Sow seed indoors with warmth. Seed saved from hybrid varieties may not resemble the parent, and peppers can cross-pollinate with other compatible peppers; buy fresh seed if you need a predictable variety.

Accepted botanical name

Capsicum annuum

In the US and Canada

Native in the lower 48 states. Introduced in Hawaii, the lower 48 states, Navassa Island, Pacific Basin, Puerto Rico and US Virgin Islands.

Native range

Guatemala, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Bahamas, Belize, Bolivia, Brazil North and Brazil Northeast.

Measured

Average height 60 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.