Seeds to sow for a riot of colour this summer

IF you’ve had a go at gardening during lockdown and want to progress by sowing your own seeds, now’s a good time to start. Sowing your own, budding gardeners on a budget can produce plants for a fraction of the cost of buying mature ones from garden centres later on. Seeds you’ve sown indoors are also likely to flower earlier if you’ve given them a head start.

WHICH ARE THE EASIEST SEEDS TO SOW?

Annuals are a good starting point; these plants only last a year, but will give you lashings of summer colour and are great for plugging gaps in borders. They can be started off indoors from February to April, before being transplanted and then put in their final position when all risk of frost has passed. Here are some favourites.

CLEOME (SPIDER FLOWER)

These unusual hairy annuals produce impressive upright stems to 1.5m, with scented flowers in shades of violet-pink, rose-red or white (right) from early summer to early autumn. They are another excellent gap-filler in borders, where they extend colour later in the season, or are great grown in large containers.

SUNFLOWER (HELIANTHUS ANNUUS)

Growing sunflowers is child’s play, and is favoured by parents keen to get their youngsters involved in gardening. They have large seeds – perfect for small hands – and can be started off indoors in February and March in individual pots in potting compost, and then transferred to their final position in early June.

NASTURTIUM (TROPAEOLUM MAJUS)

These pretty trailers have multiple uses – they can add colour to summer pots, the flowers can be eaten and they can even lure aphids away from French and runner beans – and they’re really easy to grow from seed. Start them off indoors in seed trays of compost in February, placing the large seeds a few centimetres apart on the surface, then cover with another layer of compost, firming it gently. Place a sheet of cling film over the seed tray and put in a warm spot on a windowsill or in a light area. Once they’ve germinated, you can remove the cover and in a week or two you’ll be able to transplant them into seven centimetre pots, before putting them in their final spot.

COSMOS

These pretty half hardy annuals (right) come in an abundance of colours, from white to deep pink. They are great for plugging gaps in the summer border with their feathery leaves and daisy-like flowers. However, they won’t withstand frost, so you’ll need to start them off indoors in a seed tray or pots, with one seed per cell.

CALIFORNIAN POPPY (ESCHSCHOLZIA CALIFORNICA)

Californian poppies can be sown in spring or under cover now. They have delicate ferny foliage and bright yellow, orange, red or white flowers that are a magnet for butterflies, bees and hoverflies. The poppies make good cut flowers and thrive in poor but well drained soil.

CALENDULA

Beautiful orange and yellow flowers are produced from these seeds for an extended flowering period, lasting until the first hard frost and sometimes beyond. It’s a great companion plant to include in your vegetable garden to attract beneficial insects and keep the pests distracted. The flowers are edible and can be used in soups and salads. You can seed to resow the following year.

NICOTIANA (TOBACCO PLANT)

These annual favourites (left) have a delicious perfume, so plant them close to the house or on the patio once they are coming into flower. Sow seeds in seed compost indoors in early spring, on a sunny windowsill. Sprinkle a small pinch of seeds in each cell, cover them with vermiculite and water lightly.