Autumn Garden Jobs

I’m getting tired of writing about the weather – and I dare say you are getting tired of reading about it. Besides, there are so many jobs to get on with we won’t have time to pause for breath, and it all starts with my favourite plants – Dahlias!

Dividing Dahlias

Likely as not, frost will hit us sometime in October, and this marks the end of the dahlia season. It is time to lift, divide and store them for the winter.

You will need some sulphur powder for this job, and a sharp knife.

Dividing Dahlias - dig up tubers

Remove the stalks and dig up the tubers, giving them a good wash to remove the soil / compost.


Cut down the plants and carefully dig up the tubers with a garden fork. Wash them clean and dry them with an old towel.
Dividing Dahlias - cut the tubers

With a knife or scissors, cut out the tuber as close to where it joins the plant as you can.


You will have a stem with lots of tubers that look rather like fat fingers. With a sharp knife, cut the fingers away at the base.
Dip the Dahlia ends in sulphur

Dip the cut end in sulphur powder to fight off any infections. Repeat with all the decent sized tubers you have.


Dust the cut surfaces with sulphur powder and then wrap the lot in newspaper – lots of layers, and store them in a frost-free place until spring.
Insulate dahlia tubers

Either wrap in several layers of newspaper or in a saved bubble wrap envelope for insulation. Place in a cool, dark place until Spring.


Label divided Dahlias

Don’t forget to label your dahlias with their name and the date they were stored.

Runner Beans

For perfect runner beans next year, now is the time to start a trench. Dig a trench that is around 18 inches deep. Mark it so you don’t fall down it and pile the soil along the side of the trench. Over the coming weeks, fill 3/4 full with vegetable matter – kitchen waste, potato peelings etc, but no gravy or meat, and when there is about 6 inches free space, top up with the soil leaving a little mound.

The vegetable material in the trench will rot and create heat, and it is amazing how long this heat lasts. It will give your plants a good start when you get to sowing, or transplanting in the spring. Actually, I sow in late February, covering the area with a cloche, protecting the seedlings from cold and rain and giving them a head start in their warm soil.

Roses

Roses have had a torrid summer and some of this can be alleviated now. Take cuttings of new growth and place them in compost – say 5 per six inch pot. Remove the lower leaves and cover with a plastic bag and around 60% at least will root, giving new plants for next year. Keep them in a frost free place, I use the polytunnel, and this is heated a little when the weather gets really bad.

Transplant them in April into a larger pot – 8 inches per plant will do, and give them generous water and feed every month. Plant them out next October.

This method is ideal for climbers and bush types where the root stock is not important – and don’t be too careful, I have had great results simply chopping at climbers with shears to control them, and using the most likely ones for cuttings.

Sweet Peas

The real promise of a summer of colour and fragrance is sown now: Sweet Peas! The best are sown in October, and I sow mine in pots and keep them in a cool greenhouse until spring, when they are transplanted as small plants. They get such a good start this way, rather than sowing them in spring. If you are in a sheltered area, spend some time preparing the soil, so they can grow rapidly in a nutrient rich soil – give them plenty of rotted manure. Plants that have to make lots of colour or aroma need a lot of nutrients, and this rule holds true for any plant.

Frost

Furry plants need protecting from frost – if you have furry leaves in the rock garden (sempervivums and so on), they need to be covered. If you can get a cloche in place, all well and good, but sometimes you need a sheet of plastic held down as firmly as you can, or a covering of straw held down with plastic.

Hedges

Making a good hedge is an October job because these shrubs take well if planted now. I recently made a hedge of blackthorn, berberis, mahonia – each planted about a foot apart, in a slight zigzag. As they grow, I train them into each other and, having made a backing fence of stout garden wire attached to stakes, I will tie them into their supports. Once they are in place, they need little looking after and are particularly good at living together. Mahonia especially is very colourful and makes for a super autumnal display.

Vegetables

In the vegetable garden it is time to take down the asparagus fronds. Don’t let the fronds settle on the ground, but cut them off and bring them away to the compost heap. This will keep the asparagus beetle at bay next year. I give them a mulch of compost and well rotted manure mixed at 50-50 proportions, and they seem to come on a treat using this regime. Here’s to next June!!!

Plant out cabbage ‘All Year Round’ and cover with a cloche. This way you will get cabbages right through the winter that look good. It’s one thing being able to actually get this variety to grow in Winter, it’s quite another to get great specimens. The wet wind plays havoc with them, and they soon look messy. A cloche will do the trick!

Don’t forget to earth up your leeks against the winter storms and go round heeling in the shrubs and young trees to make sure they are really firm in their beds before they get rocked about by the Winter weather, like a dentist pulling a tooth!

Mr Digwell gardening cartoon logo

Paul Peacock studied botany at Leeds University, has been the editor of Home Farmer magazine, and now hosts the City Cottage online magazine. An experienced gardener himself, his expertise lies in the world of the edible garden. If it clucks, quacks or buzzes, Paul is keenly interested.

He is perhaps best known as Mr Digwell, the cartoon gardener featured in The Daily Mirror since the 1950s. As Mr Digwell he has just published his book, A Year in The Garden. You can also see more about him on our Mr Digwell information page.

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