How to Grow Potatoes During Wet Summers

Growing potatoes during wet summers can be difficult, but with the right techniques, you can still achieve a healthy crop. Excess rainfall increases the risk of rot, blight, nutrient loss, and poor tuber development. By improving drainage, managing airflow, and adjusting care routines, potatoes can cope well even in consistently wet conditions.

⭐ Recommended Products — Seed Potatoes & Planting Essentials

• Seed Potato Collection (Early, First & Second Earlies)
A mixed pack of quality seed potatoes to plant for a steady harvest from early summer through to autumn. Ideal if you want variety in size and maturity times.
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• Certified Seed Potatoes (Single Variety Packs)
Choose popular individual varieties (e.g., Maris Piper, Charlotte, King Edward) to suit your taste and growing goals — consistent results from true seed stock.
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• Potato Grow Bags / Containers
Reusable, breathable bags designed specifically for growing potatoes — great for patios, small gardens, or increasing yield in limited space.
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• Potato Fertiliser / Soil Booster
Specially formulated feed to support healthy tuber development and improve yields — apply at planting or as a top-dress during the season.
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• Potato Planting Guides & Markers
Helpful tools and guides that take you through planting depth, spacing, and care — plus reusable markers to keep track of different varieties.
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How Wet Summers Affect Potato Crops

Prolonged rain leads to waterlogged soil, which restricts oxygen around roots and tubers. This slows growth, increases the risk of rotting, and creates ideal conditions for fungal diseases such as blight. Heavy rain also washes nutrients from the soil, leaving plants underfed at critical growth stages.

Choose Potato Varieties Suited to Wet Conditions

Early and second early potatoes perform better in wet summers because they mature quickly and can be harvested before disease pressure peaks.

Good varieties include:

• Charlotte
• Jazzy
• Rocket
• Swift
• Arran Pilot

For maincrop growing, choose blight-resistant varieties to reduce losses in prolonged wet weather.

Improve Drainage Before Planting

Good drainage is essential in wet summers. Plant potatoes in raised beds or ridges to lift tubers above saturated soil. Adding organic matter such as compost improves soil structure and helps excess water drain away more effectively, especially in clay soils.

Avoid Planting Too Early

Cold, wet soil increases the risk of seed potatoes rotting. Delay planting until soil conditions improve, even if it means planting later than usual. Chitting seed potatoes gives them a faster start once planted and reduces time spent in vulnerable conditions.

Use Containers and Grow Bags

Grow bags and containers offer excellent control during wet summers. They drain better than open ground and can be moved to more sheltered positions if heavy rain persists. Ensure containers have plenty of drainage holes and are raised slightly off the ground.

Increase Airflow Around Plants

Wet summers often come with high humidity. Space plants well and avoid overcrowding to improve airflow. Good air circulation helps foliage dry quickly and reduces the spread of blight and other fungal diseases.

Water Carefully Despite the Rain

Even in wet summers, watering may still be needed during short dry spells. Check soil moisture rather than watering on a schedule. Overwatering in already wet conditions is a common mistake that leads to poor yields and disease.

Feeding Potatoes in Wet Conditions

Nutrients are easily washed out of soil during heavy rainfall. Apply fertiliser at planting and top up with light, regular feeds once plants are established. High-potash feeds support tuber development without encouraging excessive leafy growth.

Managing Blight in Wet Summers

Blight thrives in warm, wet weather. Inspect plants regularly and remove affected leaves immediately. Avoid wetting foliage when watering. If blight pressure is high, cutting foliage down early can still allow tubers to mature underground and prevent infection spreading to the potatoes.

Earthing Up and Mulching

Earth up potatoes properly to protect developing tubers from excess moisture and light exposure. Mulching with straw or compost helps stabilise soil temperature, reduces splash-back onto leaves, and improves drainage over time.

When to Harvest During Wet Summers

Harvest as soon as potatoes reach usable size rather than waiting too long in wet soil. Choose dry days where possible and allow potatoes to dry before storage. Discard damaged or diseased tubers to prevent spoilage.

Final Thoughts

Wet summers don’t have to ruin your potato crop. By focusing on drainage, airflow, careful feeding, and disease management, you can grow healthy potatoes even in challenging conditions. Flexibility and close monitoring are the key to success when the weather refuses to cooperate.