It's time to get busy preparing your garden for spring before the days lose their warmth and the garden rests for winter.
1. Tidy your patio
2. Cut the lawn
3. Prune your plants
Bush roses and buddleia (butterfly plant) can get quite tall over summer and are at risk of blowing about in the wind during winter, which can loosen their roots. To help prevent this happening, cut the whole plant back by half its length.
You can increase the area your climbing roses are covering by tying new growth to the support. Tie it so the stems are as horizontal as possible to encourage them to flower along their whole length, rather just at the top. Then cut side-shoots that flowered back to two buds from their base. Older plants can have a few of the older stems cut back to their base to reduce congestion in the plant.
4. Plant indoor bulbs for Christmas
Plant early varieties of hyacinth by early October. Put them in a cool (10°C), dark place until the shoots are about 5cm, before bringing them into the house.
Plant early varieties of hippeastrum (amarylis) by mid-October. Bigger bulbs produce the best show. Pot them into pots 2 to 3cm wider than the bulb. Water sparingly until the leaves develop.
Plant paperwhite narcissus by mid-November as they flower four to five weeks after planting. The stems may flop, so support them with twigs or small canes.
5. Bring tender plants indoors
source https://www.which.co.uk/news/article/top-gardening-jobs-for-october-aw03q6r40ltC