As cooler weather arrives, preparing your greenhouse helps keep it structurally sound and protects plants through cold spells. A greenhouse that is ready for winter can shield crops from frost while supporting a favourable growing and cultivation environment. This guide outlines practical ways to prepare for winter. Whether you have a premium aluminium greenhouse or a traditional model, these measures can protect your investment and help you use it throughout the year.
1. Clean and Tidy
- Clear away dead plants and debris: Remove dead plants, leaves and debris that could attract pests or encourage disease.
- Wash every surface: Clean walls, windows and benches using warm, soapy water.
- Look for pests: Check the greenhouse for insects or pests, and deal with any infestation promptly.
2. Inspect and Repair
- Check for cracks and gaps: Examine frames, panels and seals for possible damage.
- Strengthen weak points: Repair or reinforce loose joints and damaged panels.
- Replace damaged glazing: Replace broken glass or damaged polycarbonate sheets to reduce heat loss.
3. Improve Insulation
- Use bubble wrap: Fit greenhouse bubble wrap inside.
- Seal doors and vents: Use weather seals to stop draughts.
- Fit a thermal curtain: Adds insulation, particularly in larger greenhouses.
4. Maintain Effective Heating
- Install heating: Choose from electric, gas or kerosene heaters.
- Use a thermostat: Monitor and regulate temperature effectively.
- Maximise solar warmth: Clean windows regularly for maximum sunlight.
5. Improve Ventilation
- Install automatic vents: They regulate temperature and humidity.
- Use fans: They distribute warmth more evenly and help prevent mould.
6. Grow Winter Vegetables
- Rotate crops: Prevents soil-borne diseases.
- Use raised beds: They offer roots protection from cold.
7. Protect Plants
- Use fleece or cloches: Protect sensitive plants from cold conditions.
- Group plants: A microclimate zone helps retain warmth.
- Avoid overwatering: Helps prevent root rot.
8. Consider Lighting
- Install grow lights: LED or fluorescent lights supplement natural light.
- Position lights correctly: Ensure even coverage for plant growth.
9. Organise Tools and Supplies
- Store tools cleanly: Keep sharp, clean tools in a dry place.
- Restock supplies: Make sure seeds, fertiliser and pest-control products are ready when needed.
10. Consider Winter Equipment
- Snow protection: Limits excessive roof snow loads in relevant regions.
- Heat mats: They support seed germination.
- Use cold frames: They provide additional insulation inside the greenhouse.
11. Carry Out Regular Maintenance
- Monitor temperature and humidity: Use thermometers and hygrometers.
- Remove snow: To avoid structural damage where relevant.
- Reduce condensation: Wipe surfaces regularly.
12. Plan Emergency Measures
- Backup power: Have a generator available for outages.
- Spare insulation: Keep extra bubble wrap handy.
