Once March arrives, Nic Wilson’s potting shed is launched into action as her annual flower seeds come out.
Here, the experienced gardener behind dogwooddays talks to us about the many roles that annual flowers play in her garden. Affordable, beautiful, and easy to grow, Nic shares her favourite annual flower combinations, and tips on how to use them to create a fresh new display every year.
Sowing annual flower seeds
You can sow many hardy annuals like calendula, sunflowers, nasturtiums and Californian poppy indoors from March, in seed trays or modules, then potted on and planted outdoors when they’re large enough. Alternatively, from April, sow annual flower seeds directly outdoors to create interest throughout the summer:
- Scatter the seeds in swathes through mixed borders
- Sow in vegetable plots to attract pollinators and as companion plants
- Sprinkle over gravel gardens
When designing gardens, I often include annuals to add variety and fill gaps until shrubs and perennials develop. Many annuals self-seed, like nigella, borage and calendula, so they create maximum impact with minimum effort. They’re beloved by bees and butterflies, are ideal for cutting, and some provide edible flowers too. Annuals really do offer something for everyone.
Best colour combinations
One breathtaking colour combination I wouldn’t be without is purple and orange. One of my favourites is the delicate bell flowers of Cerinthe major ‘Purpurascens’ contrasted with Calendula officinalis nana ‘Citrus Cocktail’ or Californian Poppy ‘Sun Shades’. These flowers last for months and self-seed in my garden, but are easy to remove in areas required for other plants.
Blues and whites create a cool, sophisticated combination. I particularly like the lofty umbels of Ammi majus or Orlaya grandiflora underplanted with Nigella ‘Blue starry skies’ or the diminutive cornflower ‘Dwarf Blue Midget’.
Best annual flowers for containers
One year I was given a packet of Coreopsis x hybrida ‘Incredible’ which I sowed in a spare container. The result was a blaze of colour throughout the summer – I’d definitely recommend these easy-to-grow, eye-catching flowers.
Other container successes include calendula, which I also grow in the vegetable garden.
My favourites are Calendula ‘Snow Princess’ which lasted through the winter this year, and my desert island flower, Calendula ‘Sherbet Fizz’ whose faded bronze petals I first met in Nick Bailey’s Winton Beauty of Mathematics Garden at Chelsea in 2016 – it was love at first sight!
Annuals offer quick rewards for children, both in terms of their prolific flowers and the edible qualities of many blooms. My kids like growing nasturtiums to eat their peppery leaves, petals and (later in the season) their pickled seedpods – a favourite pizza topping in our house.
They also grow sunflowers, especially the dwarf varieties and sunflower ‘Velvet Queen’ with its large, maroon-coloured heads. If you want to grow a range of different sunflowers, try sowing seeds from the T&M sunflower collection which includes ‘Harlequin’, ‘Italian White’ and ‘Velvet Queen’.
What’s your favourite annual flower? Leave us a comment and remember to tag us on your photos this summer.
Nic Wilson is a writer, garden designer and Garden Media Guilds Awards nominee (Best Blog, 2018). She enjoys growing flowers and unusual fruit, vegetables and herbs, and loves to encourage nature into the garden. She also blogs at dogwooddays.