Strawberry in Zone 3B — Great Plains

There's nothing quite like a sun-ripened strawberry, and even with our shorter growing season here in Zone 3B of the Great Plains, you can absolutely enjoy them fresh from your garden. Their sweet taste and versatility in desserts and jams make the effort well worth it. Plus, they're a beautiful addition to any garden.

Sure, we have our share of extreme weather and a relatively short 118-day growing season, but with a little planning and attention to timing, you can successfully grow strawberries. We'll focus on getting them off to a strong start so you can enjoy a rewarding harvest.

Transplant your strawberry starts outdoors from early to late May, after the risk of hard frost has passed. Before planting, be sure to harden off your transplants by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the intense Plains sunshine and variable temperatures.

Space your strawberry plants 12-18 inches apart to allow for their spreading growth habit. Keep an eye on the weather forecast during this time. A late cold snap is always possible, so be ready to cover your plants if needed. Bare-root plants or potted starts are the way to go; don't bother with seeds.

Strawberries need consistent moisture, especially when they're fruiting. In our Great Plains climate, this can be tricky with our variable rainfall and hot summers. Aim to give your strawberry plants about 1 inch of water per week, whether it comes from rain or your hose.

Stick your finger about 2 inches deep into the soil near the base of the plant. If it feels dry, it's time to water. Watering at the base of the plant is best, drip irrigation is ideal, as wet foliage can lead to fungal problems in our low-to-moderate humidity.

Mulch heavily around your plants with straw or wood chips to help retain moisture and suppress weeds. During hotter periods, you might need to water more frequently. Watch for signs of underwatering (wilting leaves) or overwatering (yellowing leaves).

Strawberry pruning is pretty minimal, but it's important for maximizing your harvest. Throughout the growing season, remove the runners (the long stems that sprout new plantlets) unless you want the plants to spread. Removing runners directs the plant's energy towards fruit production.

If you're growing June-bearing strawberries, renovate the bed after harvest by mowing or cutting back the foliage. This encourages new growth for the next season. As we approach the first frost around mid- September, remove any dead or diseased leaves to prevent overwintering problems.

Your first strawberry harvest in Zone 3B will typically be from early August through mid September. Look for berries that are fully red with no white shoulders. They should also have a fragrant smell.

Gently pick the berries with the green cap attached, twisting slightly to separate them from the plant. Harvest in the morning for the best flavor, as the sugars will be most concentrated then. To encourage continued production, pick ripe berries regularly.

As the first frost approaches in mid- September, harvest any remaining ripe or nearly ripe berries. You can use these in jams or freeze them for later use. Unripe berries won't ripen off the vine.

Here are some common problems you might encounter with strawberries in the Great Plains:

Gray Mold

• What it looks like: Fuzzy gray mold on berries, especially after wet weather.
• What causes it: A fungal disease that thrives in humid conditions.
• How to fix/prevent it: Improve air circulation by spacing plants properly. Remove infected berries immediately. Water at the base of the plant to avoid wetting the foliage.

Slugs

• What it looks like: Irregular holes in leaves, especially low-growing plants. Silvery slime trails on leaves and soil. Damage worse at night and in wet weather.
• What causes it: Gastropods that feed at night in moist conditions. Hide under mulch, boards, and debris during the day.
• How to fix/prevent it: Beer traps (shallow dish of beer sunk into soil). Iron phosphate bait (pet-safe). Remove hiding spots. Water in morning so soil surface dries by evening. Copper tape around beds. Diatomaceous earth around plants.

Birds

• What it looks like: Missing berries, pecked fruit.
• What causes it: Birds love ripe strawberries!
• How to fix/prevent it: Cover your plants with netting or use bird-scaring devices like shiny tape or decoys.

Strawberry Crown Borer

• What it looks like: Weakened plants, stunted growth, wilting. Small, white grubs inside the crown of the plant.
• What causes it: A beetle whose larvae bore into the crown of the strawberry plant.
• How to fix/prevent it: Remove and destroy infested plants. Rotate crops. Use row covers to prevent adult beetles from laying eggs.

Verticillium Wilt

• What it looks like: Lower leaves yellow, wilt, and die, progressing upward. One side of plant may be affected first. Brown streaks in stem cross-section.
• What causes it: Soil-borne fungus that persists for years. Cooler soil temperatures favor it (unlike fusarium). Wide host range.
• How to fix/prevent it: No cure — remove infected plants. Rotate with non-susceptible crops (corn, grains). Solarize soil. Plant resistant varieties (look for 'V' on labels).

Great Plains Specific Challenges: Our hot summers and variable rainfall can stress strawberry plants, making them more susceptible to diseases and pests. Consistent watering and good air circulation are crucial. The extreme temperature swings can also be tough on young plants, so provide extra protection during those times.

Companion planting can give your strawberries a boost here on the Plains. Lettuce and spinach make great companions because they provide ground cover, helping to keep the soil cool and moist. Onions and garlic are also good choices, as they deter pests with their strong scent. Thyme is a good companion because it attracts beneficial insects. Borage attracts pollinators, which will help with fruit production.

Avoid planting strawberries near broccoli, cauliflower, pepper, and tomato. These plants are susceptible to verticillium wilt, which can easily spread to your strawberries. It's best to keep them separated to prevent disease.