top planting and gardening tips for September

top planting and gardening tips for September

September is a transitional month for gardening in many regions. The weather starts to cool down, and it's time to prepare your garden for the upcoming fall and winter seasons. Here are some planting and gardening tips for September:

Lawn Care

Continue mowing your lawn regularly, but raise the cutting height slightly as the weather cools. Repair any bare patches with grass seed and topsoil.


Keep on top of weeds, as they can still grow vigorously in September.


Remove spent flowers from annuals and perennials to encourage new blooms and prevent the plants from putting energy into seed production.


Many apple varieties are ready for harvest in September. Check the colour, firmness, and flavor of the apples to determine if they are ripe. Twist or gently lift the apples to harvest them without damaging the tree.

Prune apples

Pruning Shrubs and Trees

Late summer to early fall is often a good time to prune shrubs and trees. Be cautious with major pruning, as it can stimulate new growth that might not have time to harden off before winter. Focus on removing dead or diseased branches and maintaining the shape of the plant.

Trim Hedges

If you have hedges, September is a great time to give them a final trim before the winter. This helps maintain their shape and encourages dense growth.

Prune Roses

Many types of roses benefit from a late-summer pruning. Remove any dead or diseased wood and shape the bush to encourage good air circulation.

Thin Out Overgrown Vegetables

If you have vegetable plants that have become overgrown or crowded, thin them out to improve air circulation and reduce the risk of disease.

Cut Back Herbs

Harvest and prune your herbs to encourage fresh growth. This is a great time to dry or freeze herbs for later use.

Remove Invasive Plants

If you have invasive plants in your garden, September is a good time to remove them to prevent them from spreading.

Clean Up Debris:

As you prune, be sure to clean up and dispose of the trimmings properly. Remove any fallen leaves or debris from the garden to prevent the spread of pests and diseases.

Transplant Perennials

If you have perennial plants that need dividing or transplanting, early September is a good time to do it. This gives them time to establish their roots before winter.

Plant perennials - Aster Alpine


Apply a layer of mulch around trees, shrubs, and in garden beds. Mulch helps retain soil moisture, regulates temperature, and suppresses weeds.


Apply a balanced fertilizer to perennial plants and roses to support autumn growth.

Bulb Care

Lift and store summer-flowering bulbs like dahlias if you're in an area with harsh winters.

Dividing and Replanting

Divide and replant overcrowded perennials like hostas and daylilies.

Autumn Cleanup

Remove fallen leaves from lawns to prevent suffocation and mould growth. Clear out spent annuals and add them to the compost pile.


Continue to add green and brown materials to your compost pile. Turn the compost to help it break down faster.

Wildlife Care

Provide food and water for birds and other wildlife preparing for the colder months.

Greenhouse Maintenance

Clean and tidy up your greenhouse. Move tender plants inside before the first frost if you have a greenhouse or suitable indoor space.

Garden Planning

Start planning for next year by considering changes to your garden layout, ordering seeds, and researching new plants to add to your garden.

Remember that specific tasks may vary depending on your location and climate zone. September is a transitional month, so it's essential to prepare your garden for the upcoming fall and winter seasons while still enjoying the late summer harvests and blooms.