When Should You Plant Flowers for the Summer in the UK?

As the weather starts to improve and the days grow longer, everyone in the UK will start to spend more time in their gardens. This is the time when garden enthusiasts will start planning to rejuvenate their garden ready for summer.

Whether you are a gardening pro or just starting out, we are here to help you get the most out of your garden ready for the summer.

When to Plant Summer Flowers in the UK

Timing is crucial when it comes to planting in time for the summer, the best time to plant is around late April. This to avoid any late frosts before the weather really improves but this will depend on where you are in the county. Below is a more detailed breakdown:

  • March to April: Plant your seeds indoors or in a greenhouse, give them time to sprout before moving them outside or planting in a flower bed

  • Late April to May: Hardy annuals and early blooming perennials can be planted outdoors, this will depend on where you are in the country, the further south you are the warmer the climate

  • May to June: Flowers such as begonias, petunias, and marigolds can be planted outdoors once the weather is consistently and reliably warm

Best Summer Flowers for UK Gardens

Flowers offer colour, texture and fragrance to any garden, but you may not be sure on what flowers to plant. Below are a few flowers you can plant in time for summer:

For Flower Beds:

  • Geraniums – Low-maintenance and long-flowering, perfect for sunny spots

  • Lavender – A fragrant option that thrives in well-drained soil

  • Dahlias – Stunning blooms that come in a wide range of colours and size

  • Rudbeckia – Also known as Black-eyed Susan, offering golden hues from summer to autumn

Summer Flowers for Pots:

If you're limited on space, pots and containers are a great way to enjoy summer flowers, here are some of the best options

  • Petunias – Trailing varieties create a cascade of colour in hanging baskets

  • Begonias – Ideal for shady areas and available in vibrant hues

  • Fuchsias – Delicate bell-shaped flowers that thrive in pots and hanging baskets

  • Verbena – A drought-resistant choice that attracts pollinators

Tips for a Flourishing Summer Garden

If you are new to gardening, here are a few tips on how to give your plants the best start for summer:

  • Prepare the Soil: Before planting, mix your soil with compost or organic matter to ensure strong, healthy growth

  • Water Regularly: Summer flowers need consistent watering, especially during dry spell to keep them hydrated

  • Deadhead Spent Blooms: Removing faded flowers encourages continuous blooms on the rest of the flower

  • Use Mulch: Mulch helps to retain moisture and suppress weeds, keeping your flower beds looking their best

Following our guidelines above will give your garden a touch of colour making it a more enjoyable space to relax and spend time in.

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