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Plant care

Anaheim Pepper (New Mexico pepper) care

Capsicum annuum 'Anaheim'

Also called Anaheim pepper, New Mexico pepper, California green chile.

RHS H1cUSDA Warm-season annualMildly toxic to petsIndoor 60-75 cm tall

Watering rhythm

2-3days

Evenly moist, watering when the top 2-3 cm dries, roughly every 2-3 days

Light

Direct sun (at least 4-6 hours)

Soil

Well-drained, fertile loam, pH 6.0-6.8

Humidity

40-65%

Temp

21-29°C

Pet safety

Mildly toxic to pets

Mature size

60-75 cm tall

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun, 6-8 hours daily; ample light and warmth maximise pod set and ripening on this heat-loving chile. If your only bright window faces south, that's perfect for anaheim pepper — same window any aroid would fry on.

Watering

Crops like anaheim pepper reward consistent watering — evenly moist, watering when the top 2-3 cm dries, roughly every 2-3 days. The mistake is the daily light sprinkle: it never reaches the deeper roots. A long soak twice a week beats a five-minute splash every day. Provide about 25 mm weekly. Avoid drought-then-flood cycles, which trigger blossom-end rot on the long pods; mulch to steady moisture.

Soil and pot

Anaheim Pepper grows best in well-drained, fertile loam, ph 6.0-6.8. Enrich with compost. Peppers resent waterlogging and cold wet feet, so ensure free drainage and warm soil before planting. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Anaheim Pepper sits happiest at around 40-65% humidity and 21-29°C (70-85°F). Prefers warm, moderately dry air. High humidity with poor airflow encourages fungal leaf spot and fruit rot. If you keep the room above 21 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed anaheim pepper sparingly. Feed with balanced fertiliser at transplant, then a low-nitrogen, higher-phosphorus and potassium feed every 2-3 weeks once flowering. Excess nitrogen yields lush leaves and few pods. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on anaheim pepper in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Blossom-end rotSunken leathery patch at the pod tip from calcium uptake disrupted by uneven watering; keep moisture consistent and mulch.
  • SunscaldPale, papery patches on exposed pods in intense sun once foliage thins; maintain leaf cover and avoid over-pruning.
  • Slow start in cold soilPeppers stall and yellow below 15°C; wait for warm soil and use cloches or black mulch to lift temperature.
  • AphidsCluster on new growth and curl leaves; dislodge with water, encourage ladybirds or treat with insecticidal soap.

Propagation

Sow seed indoors 8-10 weeks before last frost at 24-29°C (heat mat speeds germination). Harden off and transplant after all frost into warm soil. Saved open-pollinated seed comes largely true. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Anaheim Pepper is mildly toxic to pets. Capsicum annuum (edible chile and sweet peppers) is not individually listed on the ASPCA toxic plant list, so an affirmative pet-safe status cannot be asserted; the ASPCA's 'Ornamental Pepper' entry refers to the unrelated Solanum pseudocapsicum, not this species. The capsaicin in the pods and the GI irritation peppers can cause in pets mean it should be treated with caution. Keep pods and plants away from cats and dogs and verify with a vet if ingestion occurs. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Anaheim Pepper care — frequently asked questions

What is the common name for Capsicum annuum 'Anaheim'?

Capsicum annuum 'Anaheim' is most commonly called Anaheim Pepper, but it is also known as Anaheim pepper, New Mexico pepper, California green chile. The names refer to the same species, so care instructions for Anaheim Pepper apply identically to anything sold as New Mexico pepper.

How much light does anaheim pepper need?

Anaheim Pepper grows best in direct sun (at least 4-6 hours). Full sun, 6-8 hours daily; ample light and warmth maximise pod set and ripening on this heat-loving chile.

How often should I water anaheim pepper?

Water anaheim pepper evenly moist, watering when the top 2-3 cm dries, roughly every 2-3 days. Provide about 25 mm weekly. Avoid drought-then-flood cycles, which trigger blossom-end rot on the long pods; mulch to steady moisture. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is anaheim pepper toxic to cats and dogs?

Anaheim Pepper is mildly toxic to pets. Capsicum annuum (edible chile and sweet peppers) is not individually listed on the ASPCA toxic plant list, so an affirmative pet-safe status cannot be asserted; the ASPCA's 'Ornamental Pepper' entry refers to the unrelated Solanum pseudocapsicum, not this species. The capsaicin in the pods and the GI irritation peppers can cause in pets mean it should be treated with caution. Keep pods and plants away from cats and dogs and verify with a vet if ingestion occurs.

What USDA hardiness zone does anaheim pepper grow in?

Anaheim Pepper is rated for USDA zone Warm-season annual; perennial only in frost-free zones 9-11 and RHS hardiness H1c. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Anaheim Pepper deep-dive guides

Every aspect of anaheim pepper care, each with its own calibrated guide:

Related guides

Anaheim Pepper is also known as Anaheim pepper, New Mexico pepper, and California green chile.