Anaheim Pepper in Zone 7A — Pacific Northwest

Anaheim peppers are a fantastic choice for PNW gardens. Their mild heat and versatility make them perfect for everything from roasting and stuffing to adding a subtle kick to salsas. Plus, the satisfaction of harvesting your own peppers, especially with our cool nights enhancing their flavor, is hard to beat.

While our mild summers and overcast spring days can present challenges for heat-loving plants, starting Anaheim peppers indoors gives them a head start. With our 183-day growing season, careful timing ensures a rewarding harvest before our first frost.

Starting your Anaheim pepper seeds indoors in early to late March is key in the PNW. This gives them the warmth and time they need before our soil warms up. You'll want to sow your seeds in seed trays with a good seed-starting mix.

Keep them warm – ideally around 75-80°F – using a heat mat if needed. A sunny windowsill can work, but supplemental grow lights will give you stronger, stockier seedlings. Bottom watering prevents damping off and encourages strong root growth, which is especially important with our slow spring starts.

Transplant your Anaheim pepper seedlings outdoors from early May through early June, once the danger of frost has passed. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind.

Choose a sunny spot and space them 18-24 inches apart. Our wet springs can sometimes lead to cool soil temperatures, so consider using black plastic mulch to warm the soil before planting. This gives your peppers an extra boost.

Anaheim peppers need consistent moisture, but overwatering is a common mistake in the PNW. During our wet springs, you might not need to water them at all. Let the rain do its job!

Once the dry summer months arrive, check the soil moisture regularly. Stick your finger about 2 inches deep – if it feels dry, it's time to water. Aim for about 1 inch of water per week, watering deeply at the base of the plant rather than overhead to avoid potential fungal issues in our sometimes humid conditions.

Wilting leaves can indicate underwatering, while yellowing leaves and stunted growth can signal overwatering. A good layer of mulch, like straw or wood chips, will help retain moisture and regulate soil temperature, reducing the need for frequent watering.

Anaheim peppers can get quite tall and their branches can be heavy with fruit, so providing support is a good idea. Staking is an easy and effective method. Use sturdy stakes made of wood or metal.

Install the stakes at planting time to avoid damaging the roots later. As the plants grow, gently tie the stems to the stakes with soft twine or plant ties. This will prevent the branches from breaking under the weight of the peppers, especially during our occasional windy days.

Pinching off the early flowers on your Anaheim pepper plants is a simple way to encourage more vigorous growth. This directs the plant's energy into developing a strong root system and lush foliage, which ultimately leads to a bigger harvest. Do this early in the season, before the plants are fully established.

Beyond that, standard pepper maintenance applies. Remove any yellowing or dead leaves to improve airflow and prevent disease. As the first frost approaches in mid- October, you can prune off any remaining small peppers to encourage the plant to focus its energy on ripening the larger ones.

You can expect your first Anaheim pepper harvest from mid July through early September. The peppers are ready to harvest when they are 6-8 inches long and green. At this stage, they have a mild flavor. If you prefer a bit more heat, wait until they turn red.

To harvest, use sharp pruners or scissors to cut the pepper from the plant, leaving a short stem attached. Gently support the branch with your other hand to avoid damaging the plant. Regular harvesting encourages continued production throughout the season.

As the first frost approaches in mid- October, harvest all remaining peppers, even the green ones. They will ripen indoors if stored in a cool, dry place. This extends your harvest and prevents any loss due to frost damage.

Blossom End Rot

• What it looks like: A sunken, dark brown or black leathery patch on the bottom of the pepper. It often affects the first fruits of the season.
• What causes it: Inconsistent watering leads to calcium deficiency. The dry-summer climate can cause stress, so keep an eye on watering.
• How to fix/prevent it: Water consistently, especially during dry spells. Mulch heavily to maintain even soil moisture. Remove affected fruit.

Sunscald

• What it looks like: White, papery patches on the fruit, usually on the side facing the sun. These areas may blister and become susceptible to rot.
• What causes it: Intense, direct sunlight, especially after leaves are removed. The dry summer months can bring intense sun.
• How to fix/prevent it: Avoid over-pruning foliage. Use shade cloth during heat waves. If fruit is already exposed, drape a small piece of row cover over it.

Aphids

• What it looks like: Clusters of tiny green, black, or white insects on stems and leaf undersides. Sticky honeydew residue and curled or distorted new growth.
• What causes it: Rapidly reproducing sap-sucking insects. The warm, dry conditions of summer can cause aphid populations to explode.
• How to fix/prevent it: Knock them off with a strong spray of water. Encourage ladybugs and lacewings. Use insecticidal soap for heavy infestations.

Pacific Northwest Specific Challenges: Our mild summer heat and dry-summer rainfall mean blossom end rot and sunscald are more likely to occur during brief heat waves. Late blight is less of a concern for peppers than for tomatoes, but still be vigilant for signs of disease, especially during our wet springs. Slugs can be a problem for young seedlings, so use appropriate controls.

Tomatoes make great companions for Anaheim peppers because they share similar growing requirements and can offer mutual support. Basil is another excellent choice, as it repels pests like aphids and whiteflies. Carrots and onions also deter pests and improve soil health.

Avoid planting fennel near your Anaheim peppers, as it inhibits their growth. Brassicas like cabbage and broccoli can attract similar pests and diseases, so it's best to keep them separated. Companion planting can help your Anaheim peppers thrive in the PNW.