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Gardening in September: take care of vegetable and flower beds, lawn, fruit trees and more!

New month, new garden chores to do. Now that summer is turning into fall, there’s a lot to do to keep your garden in tip-top shape. Take advantage of the last few warmer weeks to prepare it for hibernation, but also for the season ahead. And don’t think that all you have to do now is dispose of the old plants and work the soil. Even some new plants can be set now and finally without the exhausting summer heat – what a blessing! Freshen up the lawn and protect the fruit trees! We summarize everything important about gardening in September.

What can you plant now?

Protect trees from caterpillars for the coming spring

As mentioned earlier, now is the best time for some plants to be replanted. And we are talking not only about those that you can admire or use next year, but also those that will give you a harvest this season. What can you plant in September?

What gardening in September – Fresh herbs for your dishes.

Surely you have one or two herb plants in your garden that will not survive the winter and therefore need to be harvested this season (for example, some Mediterranean herbs ). Such will be resown next year. But in their place can be planted varieties that can remain outside during the winter. Such are, among others:

Plant these herbaceous plants:

  • Mugwort
  • Curry herb
  • Tarragon
  • Mint (very invasive and therefore preferred in pots)
  • Rosemary
  • Sage
  • Chives
  • Thyme
  • Wormwood
  • Lemongrass
  • Lemon balm

September gardening - planting mint and other hardy herbs

Sow fast growing vegetables

You’ve probably already harvested some of the summer vegetables and now have some space in your beds. If not, it will be soon (pumpkins, kohlrabi, fall leeks, for example, are ripening this month and harvesting them is another September gardening chore). Do not waste this free space, but use the last weeks before the big cold to get more fresh vegetables. There are vegetables that not only grow quickly and thus still ripen in time. Some even benefit from frost and become tastier (for example, some lettuces). What vegetables to plant and sow in September?

  • Endive
  • Garlic stick (produces larger bulbs).
  • Lettuce*
  • radish*
  • spinach*
  • Onions
  • Various types of Asian cabbage are suitable, including pak choi
  • lamb’s lettuce*
  • Winter purslane

* still sow at the beginning of September!

Gardening in September - What vegetables to plant

Did you know that garlic can protect strawberry plants from fungal attack? Plant the cloves between the rows in the strawberry bed at the end of the month or early October for this purpose. Be sure to choose a hardy variety of garlic.

To prepare the soil for the new beds in the spring, you can sow green manure . In this way, you naturally loosen the soil and also provide it with nutrients.

Gardening in September in the flower bed

September gardening - chrysanthemums, fall flowers and bulb flowers


Clematis, pansies, heather and other autumn flowering plants can now be planted in the flower beds, and lawns can also be sown and, above all, fertilized. Plants that will remain outside over the winter should be cleaned out now to avoid fungal diseases. Remove dead leaves from perennials and roses and pick up any that have fallen to the ground. Perennials in the garden you can now mulch.

Biennial flower varieties you can transplant this month. This step is done by some gardeners to prevent too much spread, respectively, self-sown specimens that interfere, plant them in another place where they fit better. You can also plant bulb flowers now for next year.

Houseplants that have spent the summer outside

Protect oleander and other houseplants from frost

When gardening in September, don’t forget about your houseplants. In principle, any plant should spend as long as possible outdoors. However, each variety tolerates frost and cold differently. Therefore, you should ask around. Jewel lilies and oleander, for example, tolerate temperatures down to minus 5 degrees, while indoor hibiscus or angel’s trumpet will suffer damage as soon as the above-ground parts of the plant freeze. In such cases, a protective fleece can be used overnight.

Your plant has taken a light frost and you are worried? Let it thaw slowly and gently in a dark and cool place. In any case, do not use direct sunlight for this purpose.

Take care of fruit trees and shrubs

Gardening in September - how to care for the garden in early autumn


If you are thinking about autumn pruning now – it is not yet time for that. Exceptions are early ripening fruit varieties (peach, apricot), which you can now rejuvenate and thin out.

However, you can take a protective measure. In spring, some fruit trees are attacked by the caterpillars of the so-called frost moth. However, the eggs from which they hatch are already in the soil around the trees in the previous year. So before they make their way to the leaves again, you can take preventive action: provide the trunks with so-called glue rings. Note: If the trees are supported, the supports must also receive glue rings.

With this trick, you will not only protect your trees in the coming season. You also prevent a new generation of moths, because the female (still) caterpillars do not reach the male moths.

Another gardening task in September is planting new woody plants.

Fertilize the lawn and reseed for spots