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Prepare for the transition into autumn with our September garden jobs

September marks the end of summer, and we will start to see changes in our gardens as we transition into autumn. You may think that moving into this season means you will have no flowering plants or garden colour – but there is still plenty for you to add to your garden, and September garden jobs to be done to keep it in the best condition possible.

1. Lift, divide, and replant congested clumps of perennials 

You may notice that some of your perennials this year have grown a bit too much for your space, or you may just want to move some around. So, once your perennials, like Achilleas, have finished flowering, take a bit of time over September to divide and replant them in your garden, so they are as healthy as possible next year.

2. Move houseplants back indoors

If you chose to move some of your houseplants outside this season, so they could soak up as much of the summer sun as possible, then now is the time to think about bringing them back in, so they don’t get damaged by the cool weather starting to creep in. 

3. Plant some autumn flowering plants

We all want to keep colour and life in our gardens for as long as possible, and a great way to do this over September is by planting some autumn flowering plants if you don’t already have some in your garden. Some of our favourites are Sedums, in particular, the Sedum Little Miss Sunshine (which you can get for 50% off at the moment) – it is a hardy perennial which also requires very little effort to maintain. If you’re a fan of Salvias, like many pollinators are, try Salvia Mirage (which is currently 50% off), or Salvia Caradonna!

4. Mulch bare soil

Now that some of your garden crops or flowers will have been lifted, you will have some space in your ground – this is the perfect time to add some nutrients back into your soil, ready for the coming year. Simply add 3-5cm of well-rotted manure or your own garden compost to your bare soil and wait for the worms to naturally pull it into the soil over the next year.

5. Continue to feed your hanging baskets or containers full of annual plants

With annual plants, you’re going to want to get the most out of them that you can before they die down. But, if you do continue to feed and deadhead those in your hanging baskets or containers they will often keep going until the first frosts – so don’t lose hope!

6. Look after your lawn by feeding it with an autumn fertiliser

An autumn fertiliser is rich in potassium and low in nitrogen which helps strong roots to develop, whilst also better protecting your grass from frost and ice. In comparison, a spring or summer fertiliser is high in nitrogen, which encourages soft top growth that is easily damaged in autumn and winter conditions.

7. Create compost bins in preparation for fallen leaves in autumn

As we transition into a new season, we will start to see leaves falling off trees, as well as other dead plant material as the growing and blooming seasons draw to a close. So, if you haven’t already, create a compost bin where you can easily add all of these fallen leaves so they can go to good use in your garden later in the year.