Strawberry in Zone 5A — Great Plains

Strawberries are a true taste of summer, and well worth the effort in our Great Plains gardens. Nothing beats the flavor of a sun-ripened berry picked fresh from your own plants, and they're incredibly versatile for jams, desserts, or just snacking. Plus, in our region's intense sunshine, you'll find the flavor is more concentrated than anything you can buy in the store.

We know our climate can be unpredictable, with extreme temperature swings and the ever-present risk of hail. But with a little attention to timing, you can absolutely enjoy a bountiful strawberry harvest. Our 168-day growing season is just enough to get these berries established and producing.

Transplant your strawberry starts outdoors from mid-April through early May. Before planting, be sure to harden off your bare-root or potted starts. Give them about a week of gradually increasing outdoor exposure to acclimate to our intense Plains sunshine and wind.

Space your plants 12-18 inches apart to allow for spreading. Keep an eye on the forecast – late frosts are always a possibility this time of year. If a freeze is predicted, cover your new transplants with a blanket or frost cloth.

Strawberries need consistent moisture, especially when they're fruiting. Our variable rainfall in the Plains means you can't rely on Mother Nature alone. Aim for about 1 inch of water per week, but adjust based on rainfall.

The "finger test" works well: stick your finger about 2 inches into the soil near the base of the plant. If it feels dry, it's time to water. Always water at the base of the plant to avoid wetting the foliage. In our low-to-moderate humidity, wet leaves can easily lead to fungal problems. Drip irrigation is ideal if you have it.

Signs of underwatering include wilting leaves and dry, crumbly soil. Overwatering can cause root rot, so watch for yellowing leaves and a musty smell. A good layer of mulch around your plants helps retain moisture and suppress weeds, which is especially important given our hot, dry summers.

Strawberries don't need a lot of pruning, but a little maintenance goes a long way. Throughout the growing season, remove runners (the long stems that sprout new plants) 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 next year. As the first frost approaches in early October, remove any dead or diseased leaves to prevent overwintering problems.

Expect your first strawberry harvest from early July through late August. The berries are ready to pick when they're fully red, fragrant, and have no white shoulders. Gently pluck the berries with the green cap attached to avoid damaging the plant.

Harvest in the morning for the best flavor, as the sugars are most concentrated then. To encourage continued production, pick ripe berries regularly. As the first frost approaches in early October, harvest any remaining mature berries, even if they're not perfectly ripe – they'll still be delicious in jam!

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

• Gray Mold
• What it looks like: Fuzzy gray mold on fruit and leaves.
• What causes it: Fungal disease favored by cool, wet conditions and poor air circulation. Can be exacerbated by our temperature swings.
• How to fix/prevent it: Remove infected fruit and leaves promptly. Improve air circulation by spacing plants properly. Avoid overhead watering.
• 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 strawberries!
• How to fix/prevent it: Netting over the plants is the most effective solution. Shiny deterrents like pie tins or reflective tape can also help.
• Strawberry Crown Borer
• What it looks like: Weakened plants, reduced yield, wilting, and eventually plant death. Small, white, legless larvae tunneling within the crown.
• What causes it: Beetles lay eggs near the crown, and the larvae bore into the plant.
• How to fix/prevent it: Remove and destroy infested plants. Rotate crops. Introduce beneficial nematodes to the soil. Keep the area around your strawberry plants free of weeds.
• 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 can stress strawberry plants, making them more susceptible to pests and diseases. The low-to-moderate humidity is generally a plus, but inconsistent rainfall can make watering a challenge. Mulching is key to retaining moisture and keeping the soil cool.

Companion planting can give your strawberries a boost. Plant lettuce and spinach nearby; they provide ground cover and help keep the soil cool. Onions and garlic repel pests, while thyme is said to improve the flavor of strawberries. Borage attracts beneficial insects that can help control pests.

Avoid planting strawberries near broccoli, cauliflower, peppers, or tomatoes. These plants can compete for nutrients or harbor diseases that affect strawberries. Especially in our short growing season, you want to give your strawberries every advantage you can.