Anaheim Pepper in Zone 6A — Pacific Northwest

Anaheim peppers are a fantastic choice for the PNW garden. Their mild heat and thick walls make them perfect for roasting, stuffing, or adding a touch of warmth to your favorite dishes. Plus, the cool nights we often get here seem to concentrate the flavors, giving you a richer, more satisfying pepper.

While our summers are mild and our growing season (around 148 days) can feel short for warm-season crops like peppers, starting Anaheim peppers indoors and timing your transplant carefully makes a successful harvest achievable. You'll be enjoying your own homegrown peppers before you know it!

Starting Anaheim pepper seeds indoors is the way to go here in the PNW. Aim to sow your seeds late March through mid April, roughly 8 weeks before you plan to move them outside. This gives them a good head start before our soil warms up.

Use seed trays or small pots filled with a good seed-starting mix. Keep them consistently warm—a heat mat underneath really helps with germination in our sometimes-cool springs. Provide plenty of light, either from a sunny south-facing window or, better yet, a grow light. Water from the bottom to encourage strong root growth and avoid damping off, which can be a problem with our overcast spring days.

Transplant your Anaheim pepper seedlings outdoors late May through late June, once the danger of frost has passed and the soil has warmed up. Before planting, be sure to harden them off by gradually exposing them to outdoor conditions for about a week. This prevents shock.

Space your plants about 18-24 inches apart in a sunny spot. Even in our mild summers, a little protection from wind can help. Keep an eye on the forecast – a late cold snap isn't unheard of!

Anaheim peppers like consistent moisture, but they don't want to be waterlogged. In the PNW's dry summer months, you'll likely need to water them more frequently than you would expect. A good rule of thumb is to check the soil about 2 inches deep – if it feels dry, it's time to water.

During the warmest part of the summer, you might need to water deeply once or twice a week, providing about an inch of water each time. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases. Overwatering can lead to root rot, so watch out for yellowing leaves. Underwatering shows as wilting, especially during the heat of the day.

Mulching around your pepper plants with straw or compost helps retain moisture and keeps the soil temperature more even, which is especially helpful during our fluctuating spring and summer weather.

Anaheim peppers can get quite tall, and their branches can become heavy with fruit. While not always necessary, providing support can prevent them from toppling over, especially in windy areas.

Staking is a simple and effective method. Insert a sturdy stake near the plant at planting time, being careful not to damage the roots. As the plant grows, gently tie the main stem to the stake with soft twine or plant ties. Cages also work well, providing all-around support as the plant fills out. Install the cage early so the plant grows into it.

Pinching off the first few flower buds that appear on your Anaheim pepper plants encourages them to focus their energy on vegetative growth, resulting in a stronger, more productive plant later on. You can do this early in the season, as soon as you see the first flowers forming.

Beyond that, standard pepper plant maintenance applies. Remove any yellowing or dead leaves to improve air circulation. As the end of the season approaches (first frost around early October), you can remove some of the smaller, immature peppers to encourage the remaining ones to ripen.

Your Anaheim peppers should be ready to harvest early August through late September, about 75 days after transplanting. You can harvest them green at 6-8 inches long for a milder flavor, or wait until they turn red for more heat. The walls should feel thick and firm.

To harvest, use pruning shears or a sharp knife to cut the pepper from the plant, leaving a small stem attached. Avoid pulling the peppers, as this can damage the plant. Regular harvesting encourages the plant to produce more peppers.

As the first frost approaches in early October, harvest any remaining peppers, even if they're still green. They will often ripen indoors if placed in a paper bag with a ripe banana or apple.

Here are some common problems you might encounter growing Anaheim peppers in the PNW:

Blossom End Rot

• What it looks like: A sunken, dark brown or black leathery patch on the bottom (blossom end) of the fruit, often on the first fruits of the season.
• What causes it: Calcium deficiency due to inconsistent watering. Common in our region because of our wet springs followed by drier summers.
• 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 fruit exposed to direct sun. Affected areas may blister and become susceptible to rot.
• What causes it: Intense, direct sunlight on fruit, usually after leaves are removed or lost to disease, suddenly exposing previously shaded fruit. This can be a problem even in our mild summers.
• How to fix/prevent it: Avoid over-pruning foliage. Use shade cloth during periods of intense heat. Maintain healthy foliage to shade fruit naturally.

Aphids

• What it looks like: Clusters of tiny soft-bodied insects (green, black, or white) on stems and leaf undersides. Sticky honeydew residue. Curled or distorted new growth.
• What causes it: Rapid-reproducing sap-sucking insects. They love new growth.
• How to fix/prevent it: Knock them off with a strong water spray. Encourage ladybugs and lacewings. Use insecticidal soap for heavy infestations.

Pacific Northwest Specific Challenges: The mild heat and dry-summer rainfall of the PNW means Anaheim peppers need consistent watering to prevent blossom end rot. Our relatively short growing season means starting indoors is essential. Late blight can be a concern, so ensure good air circulation and watch for early signs of the disease.

Companion planting can be a great way to improve the health and productivity of your Anaheim peppers.

Good companions include tomatoes, as they have similar growing requirements and can provide some shade during hot spells. Basil is another excellent choice, as it repels pests like aphids and whiteflies and is said to improve the flavor of peppers. Carrots and onions are also beneficial, as they deter soil-borne pests and don't compete for nutrients.

Avoid planting fennel near your peppers, as it inhibits their growth. Brassicas like cabbage and broccoli can also compete for nutrients and attract pests that might also affect your peppers.