September marks the start of autumn, a transitional month where gardens begin to slow down after the summer peak, but there’s still plenty of work to do to keep everything looking healthy and prepared for the cooler months ahead! Whether you have a small courtyard or a large, lush lawn… Now is the time to take care of essential tasks that will make a big difference in the months to come. Here’s a practical garden maintenance checklist for September:
Lawn Care
Mow less frequently – Grass growth begins to slow, but don’t stop mowing completely. Keep blades sharp and avoid cutting too short.
Aerate and scarify – September is the ideal month to improve soil health by aerating and removing thatch build-up.
Overseed bare patches – With soil still warm and moisture increasing, conditions are perfect for reseeding lawns.
Apply autumn feed – Switch to a low-nitrogen, potassium-rich fertiliser to strengthen roots before winter.
Borders and Beds
Deadhead late-flowering plants – This encourages continued blooming and tidies up displays.
Lift and divide perennials – Plants such as hostas and daylilies can be divided and replanted to keep them vigorous.
Plant spring bulbs – Daffodils, crocuses, and hyacinths should go in the ground now for a colourful display next year.
Trees, Shrubs & Hedges
Prune hedges – Give them a final tidy before growth slows down, keeping shapes neat for winter.
Check for diseased branches – Remove any dead, damaged, or diseased wood to keep trees and shrubs healthy.
Plant new shrubs and trees – Cooler temperatures and moist soil help roots establish before winter.
General Garden Jobs
Clear fallen leaves – Prevent lawns and paths from becoming slippery and stop leaves from smothering grass.
Clean patios and decking – Reduce the risk of algae build-up and make surfaces safer in wet weather.
Check garden structures – Inspect fences, sheds, and trellises for damage before winter storms.
Wildlife
Set up bird feeders – Extra food sources help wildlife prepare for the colder months.
Leave some seed heads – Not all deadheading is necessary, plants like echinacea provide food for birds.
Create a leaf pile – A corner of raked leaves makes a perfect hibernation spot for hedgehogs and insects.
Do you need help this september?
September is a busy month in the gardening calendar, but a little effort now will pay off all season long. By following this checklist, you’ll keep your garden tidy, healthy, and ready for the colder months ahead.
If you’d prefer to leave the hard work to the professionals, our garden maintenance team can take care of everything for you! From lawn treatments to autumn planting… Contact us today to book your September garden visit.