Gardening September

As the summer heat fades away and the days become shorter, one thing is for certain: September is here! It is a time of year for taking stock of your garden, reviewing your successes and failures and planning for next year’s crops. That is not to say that there is no chance of growing anything else before the year’s end, however; the right crops can keep you supplied with plenty of greens even after winter rears its ugly head.

In September, much of a gardener’s time will usually be spent clearing up after a successful summer crop. It will be the perfect time to give your greenhouse a good clean, especially if you want to stop it becoming a haven for pests eager to escape the autumn cold. You will also need to pay attention to falling leaves: pick them up, and they can be perfect for creating compost, but leave them alone and they may smother your plants and encourage the spread of fungal diseases. Finally, September is a crucial month for lawn care. It will be the optimum time to scarify your lawn, following a few weeks of consistent lawn mowing

For those that are new to gardening, as well as those of us with larger than average gardens, it is always worth considering whether you could use the advice of an experienced local gardener. In addition to helping with general garden maintenance, they can also provide advice on garden planting and ongoing care. 

Finally, this is an ideal time of year to start planning for next year’s crops. For a more efficient garden design, you may want to consider hiring a landscape designer to help you restructure the space. If you decide that you want even more room to work with next year, ask a local carpenter for a quote on creating raised beds. 

Gardening September

What to sow/plant outside:

The summer sun might be on its way out, that does not mean there is nothing for you to do in your garden this September. For one, you will need to stop weeds from establishing themselves in your empty beds. This is particularly important for dangerous types like Japanese knotweed, which should be removed by a specialist.

A number of vegetables have 'winter varieties' which you can plant in September and still eat in the same year. Be sure to do your research before buying your seeds, and remember to follow the instructions to the letter. 

To sow: corn salad, winter onions, salad leaves, spinach, winter spring onions, turnip, winter lettuce

To plant: spring cabbages, garlic bulbs, pak choi

Gardening September

What so sow/ plant in a greenhouse/ polytunnel

Your greenhouse is a useful tool, provided you use it properly! 

With the changing weather, you will need to change your habits: firstly start watering the plants inside earlier in the day so that the greenhouse is not damp and cold by the evening. You will also want to start closing the doors and vents early in the evening in order to trap heat inside overnight. Finally, if you put shaders on your greenhouse during the summer, now is the time to remove them so that your plants can make the most of the diminishing light. 

To sow: spring cabbages, winter salads

Gardening September

Jobs to do:

September means colder weather and shorter days, but you still have work to do if you want to keep your garden healthy!

  • Growing perfect vegetables is no easy task and you cannot afford to sit on your laurels once your crop starts to bear fruit (or veg). Keep on top of your harvesting, not just to free up space but to prevent anything from spoiling your hard work!
  • As you move into September it will be time to start planning your ‘autumn cleanup’. Start by removing any old plants and finished crops from your plots and clear away any weeds. You will want to keep your plot clear in preparation for winter gardening.
  • If you have fruit trees, keep an eye out for any rotten fruits hanging from the branches. Remove these as soon as you see them, or they may end up spreading diseases to your tree.
  • As part of your ‘autumn cleanup’, you will also want to give your greenhouse some TLC. As well as freeing up space, clean the inside of the windows with soapy water. Simply leaving your greenhouse as it is will make it a perfect winter home for pests. By cleaning it out, you can also reduce the risk of diseases and pests next year.
  • September is one of the best times of year to scarify your lawn as it will leave the grass enough time to recover before the winter cold. You can also aerate your lawn by making holes in it with a garden fork.
  • With autumn comes falling leaves, so you will need to get collecting! If not, the leaves could deprive your plants of resources and encourage fungal growth. The dead leaves, along with other dead plant matter, will also be ideal for composting!
  • This September it will be a good idea to prepare for the wet months by setting up a rainwater harvesting system