How to Clean Greenhouse Glass: A Step-by-Step Guide

Keeping your greenhouse glass clean is essential for maintaining healthy plants and a productive growing environment. Dirt, algae, and grime can block sunlight, reducing the light your plants receive and potentially harbouring pests or diseases. A clean greenhouse not only looks better but also promotes healthier growth. Here’s a step-by-step guide to cleaning your greenhouse glass effectively.

1. Why Clean Greenhouse Glass?

Over time, dirt and debris can build up on your greenhouse glass, reducing sunlight penetration. This can impact photosynthesis, slowing plant growth. Regular cleaning ensures:

• Maximum Light: Clean glass allows more sunlight to reach your plants.
• Pest Prevention: Removing algae and debris helps reduce pest and mould infestations.
• Improved Aesthetics: A clean greenhouse looks tidier and more inviting.

2. What You’ll Need

Gather the following tools and materials:

• A soft-bristle brush or broom
• A bucket of warm water
• Mild detergent or greenhouse cleaning solution
• A sponge or soft cloth
• A squeegee or microfibre cloth for drying
• Gloves and safety goggles for protection
• Step ladder (if necessary)

3. Cleaning the Exterior

1. Start by Brushing Off Debris: Use a soft-bristle brush to remove loose dirt, cobwebs, and leaves from the glass and frame.
2. Apply Cleaning Solution: Mix mild detergent with warm water or use a specialised greenhouse cleaner. Apply with a sponge or cloth.
3. Scrub Gently: Work in small sections, scrubbing gently to remove algae or grime. Avoid abrasive pads that may scratch the glass.
4. Rinse Thoroughly: Use a hose or clean water to rinse away soap residue.

4. Cleaning the Interior

1. Remove Plants and Tools: Temporarily move plants and equipment to create space and avoid damage.
2. Wash the Glass: Repeat the cleaning steps from the exterior, taking care around frames and seals.
3. Dry the Glass: Use a squeegee or microfibre cloth to dry the glass, preventing streaks.

Key Tips:

• Clean your greenhouse at least twice a year—spring and autumn are ideal.
• Avoid cleaning in direct sunlight to prevent streaks.
• Check for cracks or damaged seals during cleaning and repair as needed.

A clean greenhouse ensures your plants receive the maximum light they need to thrive. With regular maintenance, you’ll enjoy healthier crops and a more efficient growing environment.