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What to sow and grow in September
September might be peak harvest time, but there’s still plenty to sow and grow this month.
If you're still looking for other jobs to do, check out our
page - we'll help you keep busy! 'what to do in the garden in September' Flowers to sow and grow
Here are the flowers to sow and grow this month:
In the greenhouse/indoors
• Surface-sow euphorbia seeds now in trays indoors.
• Sow dierama seed now on the surface of moist compost. Keep in a cool greenhouse over winter.
In the cold frame / under cloches
• Sow calendula seeds in pots now and keep in a cold frame, for fruity colour from early summer next year.
• Sow in a cold frame to plant out in the spring. violas
• Sow lupins , aquilegia , aconitum and in a cold frame now. hollyhocks
• Sow eryngium and in pots and place in a cold frame this month to enjoy their silvery spiky foliage next year. echinops
• Start verbascum seeds off outdoors now in pots in a cold frame.
• Sow perennial salvias into pots and trays outdoors and leave in a cold frame or unheated greenhouse through the winter.
• Sow into pots and trays outdoors for stunning flowers next summer. red hot pokers
• Sow helenium in a cold frame to attract bees and butterflies into your garden next year.
Direct sow outdoors
• Sow (Bishop's Weed) directly in the ground now where you'd like it to flower. Autumn sowing will produce bigger, more robust plants to grow. Ammi majus
• Sow hardy geraniums outdoors and leave them to over-winter.
• Direct sow hardy annuals, such as , cornflowers , poached egg plant and larkspur, for bigger plants next year. annual poppies
• Sprinkle into your borders for stunning colour late next spring. California poppies
• Direct sow Love-in-a-Mist (nigella) - it will over-winter quite happily and will self-seed prolifically!
Sow this month for flowers next summer. delphiniums Plant outdoors
• Fill gaps in your borders with autumn-flowering plants, such as and sedum , to extend the colour to the end of the season. chrysanthemum
• Plant hyacinth and amaryllis bulbs for forcing, to ensure a crowd of colourful blooms at Christmas. Keep them in a dark, cool place like a shed or garage and bring them indoors when the shoots are 5cm tall. Perfect for a homemade Christmas present!
• Plant spring-flowering bulbs, such as , daffodils and crocus . hyacinths
• Plant out any biennial plants sown earlier in the year. This includes , foxgloves and wallflowers . violas
• Plant new , trees and perennials . Now is a good time as the soil is still warm and increasing rainfall should be on its way. shrubs
Vegetables and herbs to sow and grow
Here are your vegetables and herbs to sow and grow this September:
In the cold frame/ greenhouse/ under cloches
• Direct sow spinach now and offer protection as the weather cools. This will ensure harvests throughout autumn and winter. cloche
• Sow spring cabbages, such as ' and April' ' into modules in the greenhouse. Durham Early'
• Sow pak choi under cloches now for an autumn supply of baby salad leaves.
Direct sow outdoors
• Sow - it’s a fully hardy crop which can be sown outdoors now for cropping throughout the autumn and winter. corn salad (lamb's lettuce) now
• Sow ' green manures ' on empty beds now to help improve your soil structure and prevent weeds establishing over winter.
• Sow 'Hi Keeper' onions into a well-prepared seedbed - these are the best variety of onion for autumn sowing. Only thin your onion seedlings in the spring.
• Direct sow salad leaves now.
• Try sowing the very hardy spinach outdoors this month for winter harvests later in the year. 'Perpetual'
• Sow winter-hardy spring onions, such as ' ' and ' White Lisbon ' for crops next spring. Performer
• Make your last direct sowings of summer radishes this month - the cool autumn conditions are ideal.
• Sow turnip seeds into well-prepared beds this September, for small roots.
Sow winter lettuce, such as ', directly into the ground now. Arctic King' Plant outdoors
Keep one step ahead - what to order this month
What to do in the garden archive