Skip to main content

What to Do in the Garden This Week - September 10th

Published on September 11th 2020

by AlanGardenMaster. All rights reserved

A family planting up a hanging basket
This week, there's plenty of harvesting to be done and some suggestions of winter crops and flowers to plant and sow. Check out my September Garden Calendar Tips for more on edibles and ornamental gardening.
September flower border

What to Do in the Garden This September


A large pumpkin fruit

What to Do in the Vegetable Garden This September


Download the free Candide App to get help and answers from a warm community of gardeners, including Alan!
Download on the App StoreGet it on Google Play

Fruit and veg

  • Harvest sweet corn when the tassels are just going brown and the tops kernels produce a milky sap when you push in your thumbnail.
Sweet corn tassels
Sweet corn cob tassels
  • Sow the hardy strain of 'White Lisbon’ salad onion. They will over-winter as small plants and provide you with tasty onions for your early spring salads. They will be ready well before the spring-sown ones are ready.
  • Any trained forms of tree fruits should have the summer pruning completed now. So that's cordon, espalier, fan and step-over trained fruit.
  • Sow more land cress, mizuna, kale and lamb’s lettuce for winter salads. These can provide you with fresh salads for most of the winter and can be grown easily in pots and troughs!
Mizuna and kale plants
Mizuna and kale seedlings
  • Autumn fruiting raspberries should be ready to pick and are so easy to grow! These generally don’t need support.
Autumn Bliss raspberries fruits on a plant
Raspberry 'Autumn Bliss'

Prepare for winter

  • Clean out nesting boxes and give your bird table a good scrub before the main bird feeding season gets underway. Jeyes disinfectant works well on bacterial and fungal diseases.
  • Replant pots and hanging baskets with autumn, winter and spring flowering and foliage plants. Plant them close together as you will get less growth at this time of the year. Use fresh compost and Osmocote feed for the best results, and pop in some dwarf spring-flowering bulbs too!
A hanging basket filled with plants for winter
A hanging basket filled with plants for winter

Time to sow

  • Create a cottage garden effect by sowing easy to grow hardy annuals. Calendula and Love-In-A-Mist complement each other nicely. Cornflower, Larkspur and Clarkia will give some height to the middle and back of a border and are excellent for cut flowers! All can be sown directly into well-prepared soil and don’t need to be raised in trays and transplanted. They are hardy enough to over-winter without frost protection and will give a good show next summer!
  • September is the best month for establishing new lawns. Sow new seed or turf after careful soil preparation. Don’t skimp on the amount of seed, as this is the one chance to get it right!
Rolls of lawn turf
Rolls of lawn turf
  • Rejuvenate tired-looking lawns by over-seeding with a mix of fresh seed and proprietary lawn dressing compost. This is what professional greenkeepers regularly do. You can also use Westland Lawn Thickener (seed & feed).
  • Read my article on autumn lawn care for more information.

Related articles

a butterfly on a Sedum flower

Slow reads


Everything You Need to Know About Ice Plants

Ice plants are easy to grow, have attractive foliage when not in bloom and look great with other garden plants at this time of...
A pile of squash and pumpkin fruit

Slow reads


Alan's Edible Plant of the Month; Pumpkins and Squash

All these wonderful veg are related and are also in the same family as cucumbers, marrows and courgettes. Pumpkins grow...
A pink autumn crocus flower

In the garden


What to Do in the Garden This Week - September 4th

This week, I've some tips on plant propagation, early bulb planting, what to grow in the veg patch and some tips on giving...

Love gardens? Sign up for Candide’s Almanac!

A weekly edit of freshly picked gardening tips, travel guides, and the best botanical days out happening near you. Unsubscribe at any time.



About usCareersPrivacy policy

Candide is your guide to visiting UK public gardens. Find the best gardens, buy tickets and enter with just your phone. Download the app for offline tickets, community access and more.

Terms & ConditionsCode of Conduct

© 2022 Candide

Made in Bristol