What to do in your garden in September

By : | 0 Comments | On : August 10, 2016 | Category : Garden Jobs, Gardening, Jobs in the garden

What to do in your garden in September

The whole planet literally turns a corner in its journey around the sun and in the UK we really feel the effects. The tides go high, the rivers fill up and the daylight changes. September is a time for preparation.


You can continue to sow winter crops.

Spring onions – in drills (a ‘scrape’ in fine soil 6 – 8 cm (3 in) deep and as long as you wish) at 3 cm (1 in) apart. Keep the drills at least 40 cm (18 in) apart.

Spring Cabbage – treat them like spring onions, but then you will thin them down gradually until you have plants at something around 40 cm ( 1 ft to 18 in) apart.

Turnips – treat exactly like spring cabbage.

Salad – rocket, mizuna, lettuce and other salads can all be sown. So thinly in a drill a little more densely than spring onion. Keep the drills at least 40 cm (18 in) apart.


Garlic – don’t use shop bought garlic, buy from the garden centre or dealer. Press a clove at 20cm (8 in) intervals into the soil about 3cm (1in) deep.

Onion sets – Over wintering onion sets (little bulbs not seeds) can be pressed in to the soil at a depth of around 1cm. Use a dibber to make a hole first 1cm deep and firm them in well otherwise they will throw themselves up again. Space at around 30 cm (1 ft)

Christmas new potatoes

A bit of an experiment this, but worth a go. We have tried two methods.
Lift a potato vine from the soul really carefully and remove all but a couple of tubers: KEEPING THE VINE INTACT but cutting back to around 12 inches. Place in a large container and keep frost free.

Gather some new potatoes that are left over (The earlier the better) and put them in some compost in a large bucket. As they grow, fill the container with a little more compost until the plant is over the rim.


Of course it is harvest time. Store only those crops that are completely perfect and eat the rest. (This harvest and sale of crops gave rise to the feast of Michelmass on 29th September, when the rent was due!)

Top up or start a new compost heap. Give the heap a turn to aerate it.

Make a rotting trench for broad beans. Dig about 60 cm (2 ft) and half fill it with kitchen (only plant) waste and chopped up vegetables that are not edible – stalks and the like. Refill the trench. This will be a great place to sow broad beans later.


There are still a lot of slugs and snails around, so trap them, bash them, salt them, squeeze them, eat them (well the birds do!) and do what you do to get rid.

Over wintering cabbages, and all brassicas, are in danger from caterpillar and hibernating insects. Remove the eggs you might find on leaves and watch out for silken areas where they are hibernating. (Please leave one cabbage for the wildlife – it would be wrong to push them to extinction.)

Over wintering onions and leek get a rust called puccinia. Give them a spray with Bordeaux mixture.

Still watch out for blight – especially on your tomatoes, probably much of your potato crop will be harvested by now.

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