Sowing grass seed on sparse or worn patches of lawn should see quick growth. If you have a particularly worn area, dig it over to alleviate compacted soil and scatter the seeds or replace with a new piece of turf
Whilst attending to a tired lawn and preparing for next year, you could also take the time to scarify, or aerate, your grass
September should be a good month for ripening fruit, so make sure to pick them when ready
Pot spring-flowering bulbs such as daffodils, crocus and iris - making sure they have good drainage
Prune shrub roses
You can replace your summer bedding plants with winter varieties
Cut back the dead stems of summer-fruiting raspberries
At the end of the month, start moving tender plants undercover to shield from the cold
Sow winter onions and quick-growing salad crops such as spinach, spring onions, rocket, dill, and pak choi
Harvest your onions when the leaves are starting to wilt. You can store them in a paper or net bag, or garden tray until you need them
Trim back lavender after flowering, removing any dead stalks and about 1 inch of leaf growth - this should help reduce the risk of it becoming woody and unruly