Best Plants for Window Boxes

What to grow in window boxes

April 14, 2024 | 8 min read
A beautifully arranged window box full of vibrant flowers

As a professional gardener based in Staffordshire, I've spent over 15 years cultivating beautiful gardens and landscapes across the Midlands. One of the simplest ways to add a splash of colour and life to your home is with window boxes. They're perfect for small spaces and can be tailored to suit any season or style. In this article, I'll share some of the best plants to grow in your window boxes, considering our unique UK climate.

Quick Answer

For UK window boxes, choose hardy plants like pansies, geraniums, and herbs for year-round appeal and easy maintenance.

Choosing the Right Plants

When selecting plants for your window boxes, consider the orientation and exposure to sunlight. South-facing boxes will get more sunlight, while north-facing ones might be shadier. This will influence your plant choice significantly.

Sun-Loving Plants

For boxes that receive plenty of sun, consider:

  • Geraniums: Bright and cheerful, they thrive in full sun.
  • Petunias: Available in many colours, perfect for a vibrant display.
  • Lavender: Adds fragrance and attracts pollinators.

Shade-Tolerant Plants

If your window box is in a shadier spot, opt for these:

  • Fuchsias: Known for their exotic-looking flowers.
  • Begonias: Ideal for adding texture and rich colours.
  • Hostas: Provide lush foliage and do well in shade.

Seasonal Planting Guide

To keep your window boxes looking their best throughout the year, consider the following seasonal planting calendar:

Season Planting Suggestions Tips
Spring Pansies, Primroses Start with hardy varieties that can withstand late frosts.
Summer Geraniums, Petunias Water regularly and deadhead to promote new blooms.
Autumn Chrysanthemums, Heathers Add mulch to retain moisture as temperatures drop.
Winter Evergreens, Winter Heathers Use frost-resistant containers and protect from harsh winds.

Herbs for Window Boxes

Herbs are a fantastic addition to any window box, providing both beauty and utility. They thrive in the UK climate and are perfect for culinary use.

  • Thyme: Hardy and aromatic, great for cooking.
  • Mint: Requires regular pruning to prevent it from taking over.
  • Parsley: Ideal for garnish, easy to grow.

Maintenance Tips

Proper maintenance is essential to keep your window boxes thriving:

  • Water regularly, especially during dry spells. Ensure good drainage to prevent root rot.
  • Feed with a balanced fertiliser every few weeks during the growing season.
  • Deadhead spent flowers to encourage new growth.

Frequently Asked Questions

What size should my window box be?

A typical window box should be at least 20-25 cm deep and wide enough to accommodate your chosen plants. Ensure it has drainage holes.

How often should I water my window box?

In the UK, watering twice a week should suffice during normal weather conditions. Increase to daily watering during hot spells.

Can I grow vegetables in window boxes?

Yes, many vegetables like lettuce, radishes, and cherry tomatoes can be successfully grown in window boxes with adequate sunlight.

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