How to Grow Strawberries in a Greenhouse

Grow Strawberries in a Greenhouse Guide

Growing strawberries in a greenhouse is a delightful way to enjoy fresh, juicy berries throughout the year. Whether you're a seasoned gardener or just starting out, this guide will walk you through the process of cultivating strawberries under glass. Let's explore how to grow strawberries in a greenhouse and savour the sweet rewards of your labour.

Growing Strawberries in a Greenhouse

Strawberries thrive in the controlled environment of a greenhouse, protected from frost and pests. By managing temperature and humidity, you can extend the growing season and enjoy fresh strawberries beyond summer. This method also allows for better control over soil conditions, ensuring your plants get the nutrients they need.

Growing Strawberries in a Greenhouse in Pots

Pots are an excellent choice for growing strawberries in a greenhouse. They allow you to move plants easily and manage individual care needs. Use containers with good drainage and fill them with high-quality compost. Place them where they'll receive plenty of sunlight, and water regularly to keep the soil moist but not waterlogged.

Growing Strawberries from Seed

Starting strawberries from seed requires patience but can be rewarding. Sow seeds in trays filled with seed compost, covering them lightly. Keep the trays warm and moist until germination occurs. Once seedlings are large enough to handle, transplant them into pots or directly into your greenhouse beds.

When to Grow Strawberries in Your Greenhouse

The timing of planting depends on whether you're using seeds or young plants. For seeds, start indoors in late winter. Transplant young plants into the greenhouse in early spring for a summer harvest. With perpetual varieties, you can plant anytime for continuous cropping throughout the year.

Where to Plant Strawberries in a Greenhouse

Select a spot with plenty of sunlight, as strawberries need at least six hours of direct light daily. Ensure good air circulation to prevent fungal diseases. If space is limited, consider vertical gardening systems or hanging baskets to maximize your growing area. Our Aluminium Greenhouses provide an ideal environment for strawberry cultivation, offering durability and excellent light transmission.

Advice on Watering Strawberries

Strawberries have shallow roots, so consistent watering is crucial. Water at the base of the plant to avoid wetting the leaves, which can lead to disease. In hot weather, you might need to water daily, while cooler periods require less frequent watering. A good rule of thumb is to keep the soil consistently moist but not waterlogged.

When to Harvest Strawberries from Your Greenhouse

Your strawberries are ready for harvest when they are fully red and slightly soft to the touch. Regular picking encourages more fruit production. Harvesting typically starts in late spring and can continue into autumn with everbearing varieties. For the best flavour, pick your strawberries in the morning when they're cool and at their sweetest.

What Strawberry Type to Choose?

The choice of strawberry variety depends on your taste preferences and growing conditions. Here are some popular options:

The Best Compost for Strawberries

Strawberries thrive in well-draining, fertile soil rich in organic matter. A good compost mix for strawberries should include:

• 2 parts loam-based compost
• 1 part perlite or vermiculite for drainage
• 1 part well-rotted manure or garden compost

This mix provides the right balance of nutrients and drainage for healthy strawberry plants. Avoid using fresh manure as it can burn the roots. If you're growing mushrooms in a greenhouse as well, you might be able to use some of the spent mushroom compost for your strawberries, as it's rich in nutrients.

Mulching Strawberries

Mulching is crucial for strawberry plants. It helps retain moisture, suppress weeds, and keep the fruit clean. In a greenhouse setting, you can use:

• Straw (the traditional choice)
• Black plastic sheeting
• Pine needles
• Shredded leaves

Apply the mulch around the plants, being careful not to cover the crown. This will help maintain soil temperature and humidity, crucial factors in greenhouse growing.

Removing Flowers

For newly planted strawberries, it's advisable to remove the first flush of flowers. This might seem counterintuitive, but it allows the plant to focus its energy on developing a strong root system. Once the plants are established, usually after about 6 weeks, you can allow them to fruit. This practice results in stronger plants and better yields in the long run.

Protecting your Strawberry Plants

While growing in a greenhouse offers protection from many pests, you still need to be vigilant. Here are some common issues and how to address them:

• Aphids: Use organic insecticidal soap or introduce ladybirds as natural predators.
• Powdery mildew: Ensure good air circulation and avoid overhead watering.
• Botrytis (grey mould): Remove affected fruits immediately and improve air circulation.
• Slugs and snails: Use organic slug pellets or create barriers with copper tape.

Regular inspection of your plants will help catch any issues early. Remember, prevention is always better than cure when it comes to plant health.

Feeding Strawberries

Strawberries are heavy feeders and benefit from regular fertilization. Use a balanced, water-soluble fertilizer every two weeks during the growing season. Switch to a high-potassium feed when the plants start flowering to encourage fruit development. Organic options like compost tea or seaweed extract work well too.

FAQ

Can you grow strawberries in a greenhouse in the winter?

Yes, you can grow strawberries in a greenhouse during winter, especially with everbearing varieties. However, you'll need to provide supplemental heating and lighting to mimic summer conditions. It's similar to growing tomatoes in an unheated greenhouse, where careful management of temperature and light is crucial.

Do strawberries grow better in a greenhouse?

Strawberries often perform better in a greenhouse due to the controlled environment. They're protected from extreme weather, pests, and diseases. The extended growing season and ability to control temperature and humidity can lead to higher yields and better quality fruit.

Do I need to pollinate strawberries in the greenhouse?

Most strawberry varieties are self-pollinating, but pollination can be less efficient in a greenhouse due to lack of wind and insects. Gently shaking the plants or using a small brush to transfer pollen between flowers can help ensure good fruit set.

Can you grow tomatoes and strawberries in the same greenhouse?

Yes, tomatoes and strawberries can be grown in the same greenhouse. They have similar temperature and light requirements. However, ensure good spacing and air circulation to prevent disease spread. It's a great way to maximize your greenhouse space and diversify your crops.

What month is best to plant strawberries?

In a greenhouse, you can plant strawberries almost year-round. However, for best results, plant in early spring (March-April) for a summer crop, or in late summer (August-September) for fruits the following year. This timing allows plants to establish before fruiting.

What is the best container for growing strawberries?

Strawberries grow well in various containers, but hanging baskets, tiered planters, and strawberry pots (with multiple pockets) are particularly suitable. These allow for good drainage and air circulation. Ensure any container you choose has adequate drainage holes.

Growing strawberries in a greenhouse can be a rewarding experience, providing you with fresh, delicious fruit over an extended season. With the right care and attention, you'll be enjoying homegrown strawberries in no time. For more tips on greenhouse gardening, check out our What to grow in a greenhouse Beginners Guide.

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