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Flower seeds for window boxes

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Used at RHS Chelsea Flower Show
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Showing Seeds Flower seed Kitchen garden planting guidelines : Suitable for window boxes clear all
29 items
Borago officinalis

25% off

borage
From £1.64
approx 75 organic seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 6 (6)
Calendula officinalis

25% off

Calendula officinalis
£2.79 £2.09
approx 100 seeds
0.25 star 1 star 1 star 1 star 1 star 4.3 5 4 (4)
Calendula officinalis Indian Prince (Prince Series)

25% off

Calendula officinalis 'Indian Prince' (Prince Series)
£2.69 £2.02
approx 100 seeds
0.75 star 1 star 1 star 1 star 1 star 4.8 5 5 (5)
Calendula officinalis Sherbet Fizz

25% off

Calendula officinalis 'Sherbet Fizz'
£2.99 £2.24
approx 100 seeds
0 star 1 star 1 star 1 star 1 star 4.0 5 1 (1)
Allium schoenoprasum

Best Seller

25% off

chives
From £1.64
approx 300 seeds
9cm pot
2 + 1 FREE 9cm pots
0 star 1 star 1 star 1 star 1 star 4.0 5 2 (2)
Tropaeolum majus Climbing Mixed

25% off

nasturtium - Tropaeolum majus 'Climbing Mixed'
£2.49 £1.87
approx 40 seeds
Cerinthe major Purpurascens

25% off

Cerinthe major 'Purpurascens'
From £2.62
approx 12 seeds
0.75 star 1 star 1 star 1 star 1 star 4.8 5 13 (13)
Tropaeolum majus Black Velvet (Tom Thumb Series)

25% off

nasturtium - Tropaeolum majus 'Black Velvet' (Tom Thumb Series)
£2.69 £2.02
approx 30 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 5 (5)
Tropaeolum majus Ladybird Rose

25% off

nasturtium - Tropaeolum majus 'Ladybird Rose'
£3.49 £2.62
approx 30 seeds
Calendula officinalis Orange King

25% off

Calendula officinalis 'Orange King'
£2.49 £1.87
approx 150 seeds
Calendula officinalis Snow Princess

25% off

Calendula officinalis 'Snow Princess'
£2.89 £2.17
approx 100 seeds
Erysimum cheiri Fire King

25% off

Erysimum cheiri 'Fire King'
From £2.24
approx 500 seeds
0.5 star 1 star 1 star 1 star 1 star 4.6 5 17 (17)
Lagurus ovatus

25% off

Lagurus ovatus
£2.69 £2.02
approx 500 seeds
Tropaeolum Baby Rose

25% off

nasturtium - Tropaeolum 'Baby Rose'
£2.99 £2.24
approx 30 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Tropaeolum majus Alaska Series

25% off

nasturtium - Tropaeolum majus 'Alaska Series'
£2.49 £1.87
approx 40 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Tropaeolum majus Cherry Rose Jewel

25% off

nasturtium - Tropaeolum majus 'Cherry Rose Jewel'
£3.99 £2.99
approx 30 seeds
Tropaeolum majus Empress of India

25% off

nasturtium - Tropaeolum majus 'Empress of India'
£3.39 £2.54
approx 35 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Tropaeolum majus Peach Melba

New

25% off

nasturtium - Tropaeolum majus 'Peach Melba'
£3.29 £2.47
approx 20 seeds
Tropaeolum minus Bloody Mary

25% off

nasturtium - Tropaeolum minus 'Bloody Mary'
£3.89 £2.92
approx 30 seeds
Papaver commutatum

25% off

Papaver commutatum
£2.79 £2.09
approx 500 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 4 (4)
Borago officinalis Alba

25% off

borage - white borage
£3.19 £2.39
approx 50 seeds
1 star 1 star 1 star 1 star 1 star (2)
Chamaemelum nobile

25% off

common chamomile
From £2.39
approx 400 seeds
9cm pot
2 + 1 FREE 9cm pots
1 star 1 star 1 star 1 star 1 star (2)
Allium tuberosum

25% off

chives 'garlic'
From £1.87
approx 120 seeds
1 star 1 star 1 star 1 star 1 star (1)
dill Dukat

25% off

dill 'Dukat'
£2.79 £2.09
approx 500 seeds
radish French Breakfast 3

25% off

radish 'French Breakfast 3'
£2.29 £1.72
approx 1200 seeds
1 star 1 star 1 star 1 star 1 star (2)
Tropaeolum majus Tip Top Apricot

New

nasturtium - Tropaeolum majus 'Tip Top Apricot'
£2.79 £2.09
available to order from autumn
Tropaeolum majus Milkmaid
nasturtium - Tropaeolum majus 'Milkmaid'
£2.99 £2.24
available to order from autumn
Tropaeolum majus Purple Emperor

New

nasturtium - Tropaeolum majus 'Purple Emperor'
£3.29 £2.47
sold out
childrens grow bucket strawberry
childrens grow bucket 'strawberry'
£8.99 £6.74
available to order from winter

Our flower seeds for window boxes collection is designed to make growing from seed feel simple, useful and rewarding. These flower seeds help you make pots, baskets and smaller spaces work harder, whether you are filling gaps in a border, refreshing containers or planning a more productive cutting patch. Starting with seed is a flexible way to grow more for your money, and it gives you plenty of choice when shaping the look and feel of your outdoor space.

Choose from carefully selected varieties that suit different spaces, styles and levels of experience. You can look for reliable favourites, easy options for quick results, or more distinctive choices to add interest through the season. Clear product details help you understand where each seed works best, when to sow, and what kind of result to expect, so it is easier to choose with confidence.

At Crocus, our range is curated by people who understand real gardens and the practical decisions gardeners make. From popular flower seeds to more specialist choices, we focus on quality, useful information and convenient delivery to your door. Browse the range, pick the seeds that suit your plans, and start growing a garden that feels more colourful, personal and well put together.

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© Crocus.co.uk Ltd 2026. All rights reserved.