Growing Summer Annuals For A Splash Of Instant Colour - Richgro
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Growing Summer Annuals for a splash of instant colour

Planting Summer annuals will give your garden a boost of colour throughout the festive season. They will bloom in the hot sun of Summer and will attract bees and other pollinators to your garden.

Annuals are a great way to cover any bare areas in the garden and will bloom quickly after planting and last for many months. Planting from seed in trays is easy and within four weeks the seedlings will be ready to plant out into the garden. You can expect a display of flowers 8-10 weeks after planting depending on the variety.

For a quick hit of colour especially around Christmas, seedlings are perfect. You can also find advanced seedlings at your local nursery or garden centre that will already be in flower. They will make an instant impact in any garden, add colour to borders and look great in pots or hanging baskets.

Summer annuals benefit from a fortnightly liquid feed; This will encourage them to bloom throughout Summer.



Petunias have cascading blooms ideal for hanging baskets or in containers, they are heat tolerant and come in a wide variety of colours. Petunias will flower 6-8 weeks after planting from punnets. Plant between 25-30cm apart.



Marigolds thrive in full sun and are great for a burst of bright colour and a welcome addition to any vegetable garden as they are a natural insect deterrent.

Plant 20-30cm apart. You will see flowers 8 weeks after planting seedlings.



Calibrachoa has a low, compact spreading habit. Its flowers come in a variety of colours and can be single or doubles.

They are easy to maintain and will provide an abundance of colour during summer.

They do best in pots and hanging baskets as the flowers trail downwards.



Cosmos is a popular Summer annual with delicate fern-like foliage and flowers in a variety of bright shades.

Plant in a sunny position to keep the blooms looking their best

They are ideal for mass planting.

Cosmos plants are fast growers, expect your first flowers 12 weeks after sowing seed.



Sunflowers brighten up your garden in Summer.

With their bright yellow colour, they are fast growing and thrive in the Summer sun.

They are an ideal seed for the entire family to plant and are a great way to encourage kids to get involved in gardening.

Sow seeds into a pot or plant directly into the soil, 15cm apart and in full sun.