Hayden Salt said the soil will soon be ‘too warm’ for them
Garden centre manager Hayden Salt
Experts are reminding UK gardeners that July marks the final opportunity to sow King Charles’ favourite flower – delphiniums. If you are dreaming of a colourful, sprawling garden next summer then it is time to get the gloves out.
“Delphiniums are quintessentially British and bring that traditional elegance to any border,” says Hayden Salt, garden centre manager at Jacksons Nurseries.
“July is the last chance to sow them from seed outside, otherwise the soil will be too warm. Sow them straight into your flower beds and you’ll be rewarded with an impressive floral display the following summer.”
Delphiniums are classic cottage garden perennials, known for their dramatic blooms in shades of blue, purple, white, and pink. And if they are sown now, they will establish well before winter and flower in their second year. Delphiniums are also a favourite among pollinators, making them a valuable addition to any wildlife-friendly garden.
Delphiniums are the King’s favourite flower(Image: Getty Images)
“Bees love delphiniums, especially the darker blue and violet,” says Hayden. “They offer an important food source when in full bloom and help support declining bee populations.”
Delphiniums are notoriously hard to transplant so sowing them straight outside is a little easier, according to Hayden. He said: “Delphiniums like moist, well-drained soil and prefer to be in full sun. Remember to keep the seeds well watered during dry spells.”
July is a busy month for gardeners. With summer in full swing, several other tasks can keep your borders blooming and your crops thriving:
Deadhead flowering perennials such as roses and geraniums to encourage further blooming.Cut back faded hardy geraniums and oriental poppies to promote fresh foliage and a possible second flush of flowers.Water containers and hanging baskets regularly, preferably early in the morning or late in the evening, to avoid evaporation and prevent drought stress.Harvest fruit and vegetables such as courgettes, tomatoes and raspberries to enjoy them at their peak – and to encourage more produce.
“Gardening in July is all about maintenance, forward planning, and enjoying the fruits of your labour,” says Hayden.
“And if you want a truly stunning show next summer, don’t forget to sow those delphiniums as soon as possible.”