December
In The Greenhouse This December
If you haven’t already done so, clean out the greenhouse thoroughly. Wash the glass, the floor and the staging with horticultural disinfectant to kill any overwintering pests and diseases.
Wash and disnfect capillary matting before storing it away.
Insulate outdoor taps or turn them off at the mains. Pack away hoses that are not required.
Work in some manure to greenhouse borders to prepare them for next spring. Leave enought space to add compost later on.
Proagate perennials from root cutting including phlox, oriental poppies and mint.
Keep an eye out for aphids overwintering on your plants, remove them by hand or use a pesticide.
Top Tip:
Ventilate the greenhouse on warmer days to reduce humidity and the risk or disease.
This Month's Key Tips
- Check your winter protection structures are securley in place.
- Prune acers, birches and vines before Christmas to avoid bleeding.
- Harvest leeks, parsnips, winter cabbage, sprouts and remaining crops.
- Reduce watering of houseplants.
- Insulate outdoor taps and prevent ponds from freezing.
