- Dig organic matter into clay soils.
- Protect slightly tender perennials with straw or compost.
- Brush heavy snow off limbs to avoid snapping branches.
- Plant deciduous trees, shrubs, and hedges on dry, frost-free days, unless the soil is very wet.
- Prune trees (except for plums and cherries) and wisteria.
- In late winter, coppice shrubs for special effects like color stems or foliage.
- In windy gardens, prune back the topgrowth of tall shrubs to prevent windrock.
- Check stored dahlias, cannas, and gladioli, and remove any that show signs of rotting.
- Wrap up pots with bubble wrap and cover vulnerable plants with fleece if frost is forecast.
- Continue to take hardwood cuttings of deciduous shrubs.
- Take root cuttings of perennials.
- Continue to rake leaves off the lawn.
- Keep off lawns and soil when sodden or frozen.
- Check and repair garden tools.
- Begin making plans for next year's garden.
This list was found in Learn to Garden: A Practical Introduction to Gardening. I did modify the list a little.