Although most flowers might not look good this month, some plants can still be planted if the ground is not frozen.
If the soil is not frozen, consider digging beds and borders over thoroughly.
If the ground is not frozen, there is still a last minute chance to plant hardy plants.
Use straw or cardboard to keep your marrows off the ground, otherwise they might start to rot.
In the case that your soil is acidic, you should work lime into it.