Poblano pepper

Sun

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

Water

Water deeply when the surface soil begins to dry, keeping the root zone evenly moist but never waterlogged. Containers may need daily checks in hot weather.

Soil

Fertile, well-drained soil enriched with compost, ideally pH 6.0-7.0; use quality container compost in pots with drainage holes.

Height

2-4 ft (0.6-1.2 m)

Spread

1.5-2 ft (0.45-0.6 m)

Flowers

Small white flowers from late spring or summer until cold weather, depending on sowing time and climate.

Foliage

Pointed, smooth-edged green leaves on branching stems; frost tender.

Growth

Moderate; growth slows markedly in cool weather.

Care needed

Medium

• Pollinators
• Low allergen
• Edible

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Moderate

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.5 ft (0.15 m)

2. After 1 year

   3 ft (0.9 m)

   full size

Full size in one season.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Mildly toxic: may upset a stomach

Native to

the US

Growth rate

Slow

• Plant out after frost risk has passed, once soil is warm and nights are consistently above about 55°F (13°C).
• Space plants 18-24 in (45-60 cm) apart, or grow one plant in a container of at least 5 US gallons (19 litres).
• Water at soil level and mulch once the soil has warmed to reduce moisture swings.
• Feed container plants with a tomato fertiliser according to the label once fruit begins to set; avoid excessive nitrogen.
• Add a stake or small cage early and tie stems loosely as fruit weight increases.

Pruning. Routine pruning is unnecessary; remove broken or diseased growth with clean tools. Avoid heavy leaf removal, which exposes fruit to sunscald.

Cut fruits with scissors or secateurs when they are full-sized, firm and glossy dark green, usually about 65-85 days after transplanting in warm conditions. Leave some on the plant until fully red for a sweeter flavour or for drying as ancho peppers; full ripening takes several more weeks. Wear gloves when cutting large quantities and avoid touching your eyes.

Late winter

Sow indoors 8-10 weeks before your expected planting-out date, using gentle bottom heat around 75-85°F (24-29°C).

Early spring

Pot seedlings into individual containers and give them strong light and frost-free warmth.

Late spring

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

Early summer

Install supports, mulch warm soil and begin regular checks for aphids and drying compost.

Summer

Keep watering consistent, feed container plants as fruit develops and harvest full-sized green peppers.

Early autumn

Allow selected fruits to turn red, and collect remaining usable peppers before frost.

Late autumn

Remove frost-killed plants; keep diseased material out of home compost.

• Plant in sunny raised vegetable beds, with enough space to reach the fruit for harvesting.
• Use individual plants in large patio pots near an outdoor cooking area.
• Repeat plants through a potager, pairing their upright shape with low-growing herbs.
• Include in an edible border where glossy green and later red fruits provide seasonal colour.

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

Plant it with: Basil, Chives, Lettuce, Sweet alyssum and French marigold.

Wildlife: Flowers provide some pollen and nectar for visiting insects, although peppers are self-fertile. Birds may peck ripe fruit.

• Aphids: inspect young shoots and leaf undersides; wash off small colonies with water or use insecticidal soap according to the label.
• Blossom-end rot: dark, sunken patches at the fruit tip usually reflect disrupted calcium uptake; keep moisture steady and avoid damaging roots rather than automatically adding calcium.
• Flower drop or poor fruit set: cool nights and extreme heat can both interrupt cropping; provide shelter in cool climates and ventilation or light afternoon shade during heatwaves.
• Root rot: plants wilt in persistently wet soil; improve drainage, let container compost begin drying between waterings and never leave pots standing in water.

The fruits are edible for people and are not poisonous, but their capsaicin can irritate the mouth, eyes and skin. Fruit can also cause irritation and digestive upset in cats, dogs and horses, so do not offer it to them. Leaves, stems and roots are not food; reliable information on their toxicity to these animals is limited, so prevent chewing.

• Pasilla pepper (Capsicum annuum)

  True pasilla is the dried form of the long, narrow chilaca pepper. Poblanos are broad-shouldered and tapering; shops sometimes incorrectly label fresh poblanos as pasillas.

• Anaheim pepper (Capsicum annuum 'Anaheim')

  Anaheim fruits are generally longer, narrower and lighter green than the broad, dark green, roughly heart-shaped poblano.

• Bell pepper (Capsicum annuum)

  Bell peppers usually have a blocky shape with several rounded lobes and no heat; poblanos usually taper to a point and have mild heat.

Poblano means 'from Puebla', referring to the Mexican state associated with this pepper.

Propagation. Sow seed indoors in warmth and keep seedlings in strong light. Seeds from fully ripe, open-pollinated fruit may be saved, but crossing with other peppers can produce offspring unlike the parent; hybrid seed may also not come true.

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.