Dahlias seem a little slow this year; make sure they are well fed and watered. Provide extra support for chrysanthemums, Michaelmas daisies and other herbaceous plants if necessary.
Check for signs of mildew. Update plant records relating to annuals with details of performance, flower quality and fragrance, weather tolerance and resistance to pests and diseases so information is to hand when ordering next year’s seeds and bulbs. Tree lilies from Thompson & Morgan have done well this year — the scent drifts a good distance. Take cuttings of fuchsias, penstemons and osteospermums. Consider in-situ sowing of hardy annuals for flowering next May and June.
New stems of roses will need training into shape while they are still soft and pliable. Black spot is problematic this year, with climbers and ramblers especially affected — treat as necessary. Feed any plants growing next to walls and mulch around the stems.
Trees and shrubs
Take note of what needs remedial work this autumn and plan any tree moves so equipment can be ordered in time.
Spike worn areas, water, feed and weed. Check the blades and tines on autumn renovation equipment — scarifiers and aerators — and order replacements for any that are damaged or missing. Finalise plans for new grass areas. Source and order new turf and/or appropriate grass seed for use on badly worn areas.
Take advantage of rain-free days to treat perennial weeds with weedkiller where appropriate. Keep all mulches topped up.
Tie in new stems of raspberries. Feed autumn fruiting raspberries. Finish harvesting gooseberries, blackcurrants and redcurrants. Finish summer pruning cordon and espalier fruit trees by the end of the month. Prepare a seed bed for sowing spring cabbage. Continue harvesting beans. Keep a watch for slug and snail damage — they are proving very active after showers. Update varietal records as to yields, quality and resistance to pests and diseases so information is to hand when ordering next year’s seeds.