A gardening expert has shared the top three things you should be doing in your garden this month to make sure it thrives throughout the autumn and winter months
Zahna Eklund Social News Reporter
15:20, 14 Sep 2025
You should be tackling these garden jobs this month (stock photo)(Image: Kerkez via Getty Images)
The chilly and damp conditions are settling in as September progresses, with the heart of autumn just around the bend. Now that summer has departed, it’s all too easy to neglect your garden and allow your plants to deteriorate until you restore it come springtime.
However, one horticulturist has encouraged people to continue with their gardening endeavours during the autumn months, as your outdoor area can still flourish even when sunshine is scarce and we’re confronted with days of torrential downpours. Maintaining your garden throughout September will prepare you for a manageable autumn, putting you ahead of all the essential tasks needed for your blooms.
If you cultivate autumn vegetables such as Brussels sprouts, cabbage, potatoes, and squash, you’ll be particularly busy in the forthcoming weeks caring for your produce.
A gardening specialist from Homes & Gardens recently posted a TikTok video outlining the three essential tasks for your garden this month – including one activity that will actually extend your flowers’ blooming period considerably.
1. Deadheading
The specialist initially recommended dedicating time to deadheading your flowering plants during September.
This process involves cutting away faded flower heads from the plant to encourage fresh growth.
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She explained: “You can prolong the flowering season for so many of your late summer blooms by keeping up with deadheading and making sure all the energy goes back into producing more flowers for longer.”
If you neglect to deadhead your plants, they’ll assume the flowering season has ended and divert their energy into growing foliage, or begin the process of dying back, ready for the following year.
However, by snipping off the spent heads, you trick the plant into believing it needs to produce more flowers, thereby extending the flowering season.
2. Take cuttings from shrubs and trees
September is an ideal month for propagating new plants from existing ones.
The expert explained that all you need to do is trim your shrub just below a node, leaving a stem with some leaves on it. Strip off all of the leaves except the top two, and then place the cutting in “a pot of gritty compost”.
Nurturing this cutting indoors should help it develop into a new plant by next spring. You can then transplant it into your garden alongside your other blooms.
3. Collect seeds
By September, many of your spring and summer flowers will have begun to generate seeds. The gardener advised that now is the perfect time to start gathering them if you plan to sow them again next season.
This will provide you with more flowers next year without having to purchase additional seeds or established plants from garden centres, potentially saving you some money on your next gardening endeavour.
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