Winter is the hardest time for plants in your greenhouse. You should clean insulate your greenhouse to give your plants as much heat and light as possible.
Brush, Detergent, Bubble-wrap, Plastic Clips
Clean the panels of the greenhouse with a brush or sponge, warm water and detergent.
Clean algae from the joins between the panels. Be careful not to damage the edges of the panels.
Place bubble-wrap inside the panels to add a layer of insulation and to keep out draughts.
Hold the bubble-wrap in place using plastic clips. Make sure to leave the ventilator free so that you can lower the temperature in the greenhouse if you need to.
How to Prune
How to pH Test Soil
How to Chit Potatoes
How to Force Lily-of-the-Valley