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Flower seeds that bloom in September

Shop flower seeds that bloom in September with confidence

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Used at RHS Chelsea Flower Show
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Showing Seeds Flower seed Flowering month : September clear all
72 items
Verbena bonariensis

Best Seller

25% off

Verbena bonariensis
From £2.62
approx 250 seeds
3 × packets (approx 750 seeds)
9cm pot
2 litre pot
+ 3 more available
0.75 star 1 star 1 star 1 star 1 star 4.7 5 156 (156)
Lavandula angustifolia Munstead

Best Seller

25% off

Lavandula angustifolia 'Munstead'
From £2.62
9cm pot
2 litre pot
3 × 9cm pots
6 × 9cm pots
+ 2 more available
0.25 star 1 star 1 star 1 star 1 star 4.4 5 30 (30)
Verbena officinalis var. grandiflora Bampton

25% off

Verbena officinalis var. grandiflora 'Bampton'
From £2.62
approx 50 seeds
9cm pot
3 × 9cm pots
6 × 9cm pots
0.75 star 1 star 1 star 1 star 1 star 4.8 5 10 (10)
Angelica gigas

25% off

Angelica gigas
From £2.99
9cm pot
2 litre pot
3 × 9cm pots
6 × 9cm pots
+ 1 more available
0.5 star 1 star 1 star 1 star 1 star 4.5 5 34 (34)
Lathyrus odoratus Matucana

25% off

Lathyrus odoratus 'Matucana'
From £2.54
approx 20 seeds
0.25 star 1 star 1 star 1 star 1 star 4.3 5 10 (10)
Panicum capillare Sparkling Fountain

25% off

Panicum capillare 'Sparkling Fountain'
£4.99 £3.74
approx 100 seeds
Papaver rhoeas Amazing Grey

25% off

Papaver rhoeas 'Amazing Grey'
From £2.17
approx 250 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 2 (2)
Verbena rigida Santos

25% off

Verbena rigida 'Santos'
From £2.24
approx 40 seeds
9cm pot
3 × 9cm pots
0 star 0 star 1 star 1 star 1 star 3.0 5 2 (2)
Centaurea cyanus Polka Dot Series

25% off

Centaurea cyanus 'Polka Dot Series'
£2.49 £1.87
approx 325 seeds
Cosmos bipinnatus Dazzler

25% off

Cosmos bipinnatus 'Dazzler'
£2.25 £1.69
approx 100 seeds
0.25 star 1 star 1 star 1 star 1 star 4.3 5 3 (3)
Cosmos bipinnatus Xanthos

25% off

Cosmos bipinnatus 'Xanthos'
From £3.22
approx 30 seeds
0 star 0.25 star 1 star 1 star 1 star 3.3 5 3 (3)
Lathyrus odoratus Noel Sutton

25% off

Lathyrus odoratus 'Noel Sutton'
From £2.24
approx 20 seeds
Malope trifida Vulcan

25% off

Malope trifida 'Vulcan'
£2.25 £1.69
approx 70 seeds
Visnaga daucoides

25% off

Visnaga daucoides (syn. Ammi visnaga)
From £1.87
approx 300 seeds
Pastels cutting garden collection

25% off

Pastels cutting garden collection
£28.62 £21.46
1 × collection
Amaranthus caudatus

25% off

Amaranthus caudatus
£2.79 £2.09
approx 2200 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 2 (2)
Bupleurum rotundifolium Griffithii

25% off

Bupleurum rotundifolium 'Griffithii'
£2.99 £2.24
approx 125 seeds
Cleome hassleriana Violet Queen

25% off

Cleome hassleriana 'Violet Queen'
£3.79 £2.84
approx 125 seeds
0 star 1 star 1 star 1 star 1 star 4.0 5 1 (1)
Cosmos bipinnatus Candy Stripe

25% off

Cosmos bipinnatus 'Candy Stripe'
£2.99 £2.24
approx 100 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Cosmos bipinnatus Hummingbird Lilac

25% off

Cosmos bipinnatus 'Hummingbird Lilac'
£3.49 £2.62
approx 40 seeds
Viola tricolor

25% off

heartease
£2.79 £2.09
approx 75 seeds
Lathyrus odoratus Blue Velvet

New

25% off

Lathyrus odoratus 'Blue Velvet'
From £2.54
approx 20 seeds
Lathyrus odoratus Cupani

25% off

Lathyrus odoratus 'Cupani'
From £2.84
approx 20 seeds
0 star 1 star 1 star 1 star 1 star (1)
Lathyrus odoratus Leamington

25% off

Lathyrus odoratus 'Leamington'
From £2.47
approx 20 seeds
Lathyrus odoratus Midnight

25% off

Lathyrus odoratus 'Midnight'
From £2.47
approx 20 seeds
1 star 1 star 1 star 1 star 1 star (2)
Lathyrus odoratus Mollie Rilstone

25% off

Lathyrus odoratus 'Mollie Rilstone'
From £2.47
approx 20 seeds
Lathyrus odoratus Top Hat

25% off

Lathyrus odoratus 'Top Hat'
From £2.24
approx 20 seeds
Lathyrus × hammettii Erewhon

25% off

Lathyrus × hammettii 'Erewhon'
From £2.62
approx 20 seeds
Linaria maroccana Licilia Violet (Licilia Series)

25% off

Linaria maroccana 'Licilia Violet' (Licilia Series)
£2.99 £2.24
approx 500 seeds
1 star 1 star 1 star 1 star 1 star (1)
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 (1)
Nigella Persian Jewels

New

25% off

Nigella 'Persian Jewels'
£2.99 £2.24
approx 500 seeds
Nigella papillosa African Bride

25% off

Nigella papillosa 'African Bride'
From £2.17
approx 100 seeds
3 × packets of approx 100 seeds
Nigella papillosa Delft Blue

25% off

Nigella papillosa 'Delft Blue'
From £2.09
approx 500 seeds
Nigella papillosa Midnight

25% off

Nigella papillosa 'Midnight'
£2.99 £2.24
approx 500 seeds
Phlox drummondii Sugar Stars

25% off

Phlox drummondii 'Sugar Stars'
£3.49 £2.62
approx 300 seeds
Rhodochiton atrosanguineus

25% off

Rhodochiton atrosanguineus
£3.99 £2.99
approx 10 seeds
Salvia viridis

New

25% off

Salvia viridis
£2.99 £2.24
approx 300 seeds
Verbascum Southern Charm

New

25% off

Verbascum 'Southern Charm'
£4.99 £3.74
approx 10 seeds
Visnaga daucoides Green Mist

25% off

Visnaga daucoides 'Green Mist'
£3.29 £2.47
approx 200 seeds
1 star 1 star 1 star 1 star 1 star (2)
Phacelia tanacetifolia

25% off

Phacelia tanacetifolia - green manure
£2.89 £2.17
25m² pack
1 star 1 star 1 star 1 star 1 star (3)
Bright and bold sweet pea collection

25% off

Bright & bold sweet pea collection
£9.97 £7.48
1 × collection
Linaria maroccana Licilia collection

25% off

Linaria maroccana 'Licilia collection'
£5.98 £4.48
2 packets of seeds
Ruffling skies cutting garden collection

25% off

Ruffling skies cutting garden collection
£15.05 £11.29
1 × collection
Summer pudding cutting garden collection

25% off

Summer pudding cutting garden collection
£28.53 £21.40
1 × collection
Centaurea cyanus Classic Magic
Centaurea cyanus 'Classic Magic'
£2.89
approx 100 seeds
Consolida regalis Fancy Purple Picotee

25% off

Consolida regalis 'Fancy Purple Picotee'
£3.79 £2.84
approx 150 seeds
Consolida regalis QIS Dark Blue

25% off

Consolida regalis 'QIS Dark Blue'
£2.99 £2.24
approx 200 seeds
Cosmos bipinnatus Double Click Cranberries (Double Click Series)

25% off

Cosmos bipinnatus 'Double Click Cranberries' (Double Click Series)
£5.99 £4.49
approx 60 seeds
Helianthus annuus Desire Red
Helianthus annuus 'Desire Red'
£3.99
approx 10 seeds
Lathyrus odoratus High Scent

25% off

Lathyrus odoratus 'High Scent'
£4.79 £3.59
approx 20 seeds
Linaria purpurea

New

25% off

Linaria purpurea
£2.99 £2.24
approx 100 seeds
Verbena bonariensis Vanity
Verbena bonariensis 'Vanity'
£3.99
approx 40 seeds
Cherry creme brûlée cutting garden collection

25% off

Cherry créme brûlée cutting garden collection
£25.33 £19.00
1 × collection
Sugared almonds cutting garden collection

25% off

Sugared almonds cutting garden collection
£28.62 £22.19
1 × collection
Summer nights cutting garden collection

25% off

Summer nights cutting garden collection
£28.43 £21.32
1 × collection
Heritage sweet pea seed gift box

25% off

Heritage sweet pea seed gift box
£22.99 £17.24
gift set
Lathyrus odoratus Charlie's Angel
Lathyrus odoratus 'Charlie's Angel'
From £2.62
available to order from autumn
0.25 star 1 star 1 star 1 star 1 star (5)
Nicotiana × sanderae Perfume Deep Purple (Perfume Series)

New

Nicotiana × sanderae 'Perfume Deep Purple' (Perfume Series)
£2.99 £2.24
available to order from autumn
Dark and rich sweet pea collection
Dark & rich sweet pea collection
£9.37 £7.03
available to order from autumn
Lavish and lush sweet pea collection
Lavish & lush sweet pea collection
£9.37 £7.03
available to order from autumn
Cobaea scandens
Cobaea scandens
£3.19 £2.39
available to order from autumn
0 star 0 star 1 star 1 star 1 star (1)
Echinacea purpurea Magnus Superior

New

Echinacea purpurea 'Magnus Superior'
£3.49 £2.62
available to order from autumn
Lathyrus odoratus Daphne
Lathyrus odoratus 'Daphne'
From £2.47
available to order from autumn
Matthiola longipetala subsp. bicornis

New

Matthiola longipetala subsp. bicornis
£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
Award-winning sweet pea collection
Award-winning sweet pea collection
£10.27 £7.48
available to order from autumn
Echium pininana
Echium pininana
From £3.37
available to order from autumn
Lathyrus odoratus Windsor
Lathyrus odoratus 'Windsor'
£2.99 £2.24
available to order from autumn
Sweet pea collection highly scented
Award-winning sweet pea collection highly scented
£11.17 £8.38
available to order from autumn
1 star 1 star 1 star 1 star 1 star (1)
Lathyrus odoratus Almost Black
Lathyrus odoratus 'Almost Black'
£2.99 £2.24
available to order from autumn
Lathyrus odoratus Eclipse
Lathyrus odoratus 'Eclipse'
£2.99 £2.24
available to order from autumn
Lathyrus odoratus Karen Louise
Lathyrus odoratus 'Karen Louise'
£3.49 £2.62
available to order from autumn
1 star 1 star 1 star 1 star 1 star (1)

Our flower seeds that bloom in September collection is designed to make growing from seed feel simple, useful and rewarding. These flower seeds help you plan colour for the months when you want the garden to perform, 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.