The best thing to do in October is plant! It is the best time of year to start your trees and shrubs.
And give your existing trees, lawns an shrubs a good feeding with fertilizer high in Phosphorus for healthy roots. That’s the number in the middle of the nutrient analysis. In a bag marked 16-6-8, It is the 6.
Look now for bargains on spring blooming bulbs. You should have ordered early from the bulb catalogues and there may be some good deals available through the catalogues or at your local nursery/ big box store.
Get your bulbs in the ground as soon as possible. December is too late. Plant the bulbs three times the depth of the bulb, water well, and Happy Spring!
Fertilize your roses and keep them well watered but don’t prune now. You should remove spent blooms though, because you will encourage some bonus blooms before the plant starts it’s winter stasis.