Transforming a garden shed into a greenhouse is an excellent way to make the most of your available space and create a more sustainable and productive garden. This comprehensive guide will walk you through the process, highlight the benefits, and discuss potential drawbacks, ensuring you're well-prepared for this exciting project.

Why Convert Your Garden Shed into a Greenhouse?


  1. Extended Growing Season: By maintaining a controlled environment, you can grow plants year-round, irrespective of the outside weather conditions.
  2. Cost-Effective: Repurposing an existing structure is generally more affordable than building a new greenhouse from scratch.
  3. Space Utilisation: Maximise the use of your garden space by converting an underutilised shed into a productive greenhouse.
  4. Sustainability: Growing your own fruits, vegetables, and herbs reduces your carbon footprint and reliance on store-bought produce.
  5. Plant Protection: A greenhouse provides a safe haven for plants, protecting them from pests, extreme weather, and diseases.


  1. Initial Investment: While cheaper than building a new greenhouse, converting a shed still requires an initial outlay for modifications and equipment.
  2. Maintenance: Greenhouses require regular care and maintenance to ensure optimal growing conditions.
  3. Limited Space: Depending on the size of your shed, you may be limited in the number and variety of plants you can grow.

Steps to Convert Your Garden Shed into a Greenhouse

Step 1: Assess Your Shed

Before embarking on the conversion, assess the condition of your shed. Ensure it's structurally sound and free from significant damage. Check for any repairs that might be needed, such as fixing leaks, reinforcing the frame, or replacing rotten wood.

Step 2: Plan Your Layout

Decide on the layout of your greenhouse. Consider the types of plants you want to grow and their specific requirements. Plan for shelving, potting benches, and storage spaces for tools and supplies. Make sure there’s enough room for you to move around comfortably.

Step 3: Enhance Natural Light

Greenhouses need ample sunlight. Replace opaque walls or sections of the roof with transparent materials such as polycarbonate panels or greenhouse glass. You can also install additional windows or skylights to maximise natural light.

Step 4: Insulate and Ventilate

Proper insulation and ventilation are crucial for maintaining consistent temperatures. Line the interior with bubble wrap or thermal screens to retain heat during colder months. Install vents or fans to regulate temperature and humidity, preventing the greenhouse from overheating.

Step 5: Install Shelving and Benches

Install sturdy shelving and benches to hold your plants and gardening supplies. Use treated wood or metal to prevent rust and rot. Adjustable shelves are ideal as they allow you to accommodate plants of different sizes.

Step 6: Set Up a Watering System

A reliable watering system is essential for greenhouse gardening. Install a drip irrigation system or use a hose connected to a water source. Consider adding rain barrels to collect and use rainwater, promoting sustainability.

Step 7: Add Heating and Lighting

Depending on your climate, you may need to install heating systems such as electric heaters, heat mats, or propane heaters to maintain optimal temperatures. Supplement natural light with grow lights during shorter winter days to ensure your plants receive adequate light.

Preparing the Interior

Potting Area

Create a designated potting area with a sturdy table, storage for soil and pots, and easy access to water. This will make planting and transplanting more efficient.

Storage Solutions

Organise your tools, seeds, and supplies with hooks, shelves, and storage bins. Keeping everything in its place will help maintain a tidy and functional greenhouse.

Planting Zones

Divide your greenhouse into zones based on plant needs. Group plants requiring similar light and temperature conditions together to optimise growth and maintenance.

Choosing the Right Plants

Vegetables and Herbs

Tomatoes, peppers, cucumbers, lettuce, and herbs like basil, parsley, and mint thrive in greenhouse environments.

Flowers and Ornamental Plants

Consider growing flowers such as geraniums, petunias, and marigolds. These plants not only add beauty but can also attract beneficial insects.

Exotic and Tropical Plants

Greenhouses allow you to grow exotic plants like orchids, ferns, and tropical fruits that wouldn’t typically survive in outdoor gardens.

Maintenance Tips

Regular Cleaning

Keep your greenhouse clean to prevent the spread of diseases and pests. Remove dead leaves, debris, and weeds regularly.

Monitoring Conditions

Use thermometers, hygrometers, and soil moisture meters to monitor the internal conditions of your greenhouse. Adjust heating, ventilation, and irrigation as needed.

Pest Control

Implement integrated pest management (IPM) strategies to control pests without resorting to harmful chemicals. Introduce beneficial insects, use organic pesticides, and keep the greenhouse clean.


Converting a garden shed into a greenhouse is a rewarding project that offers numerous benefits for home gardeners. By following these steps and tips, you can create a thriving greenhouse that extends your growing season, protects your plants, and enhances your gardening experience. Take the time to plan and prepare, and soon you'll be enjoying the fruits of your labour, literally and figuratively. Happy gardening!