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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
68 items
Erigeron karvinskianus

Best Seller

25% off

Erigeron karvinskianus
From £2.99
approx 100 seeds
9cm pot
3 × approx 100 seeds
2 litre pot
+ 3 more available
0.75 star 1 star 1 star 1 star 1 star 4.9 5 221 (221)
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)
Stipa tenuissima

Best Seller

25% off

Stipa tenuissima
From £2.84
approx 30 seeds
9cm pot
2 litre pot
3 × 9cm pots
+ 2 more available
0.75 star 1 star 1 star 1 star 1 star 4.8 5 59 (59)
Alchemilla mollis

Best Seller

25% off

Alchemilla mollis
From £2.24
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 4.6 5 29 (29)
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)
Knautia macedonica

Best Seller

Up to 30% off

Knautia macedonica
From £3.22
approx 40 seeds
9cm pot
2 litre pot
3 × 9cm pots
+ 2 more available
0.5 star 1 star 1 star 1 star 1 star 4.6 5 44 (44)
Muhlenbergia capillaris

Best Seller

25% off

Muhlenbergia capillaris
From £2.99
approx 20 seeds
9cm pot
2 litre pot
3 × 9cm pots
+ 2 more available
1 star 1 star 1 star 1 star 1 star 4.9 5 8 (8)
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
3 × 2 litre pots
+ 1 more available
0.5 star 1 star 1 star 1 star 1 star 4.5 5 34 (34)
Dahlia merckii

New

25% off

Dahlia merckii
From £4.49
approx 10 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 2 (2)
Ammi majus

Best Seller

25% off

Ammi majus
From £2.17
approx 500 seeds
0.75 star 1 star 1 star 1 star 1 star 4.7 5 6 (6)
Cosmos bipinnatus Purity

25% off

Cosmos bipinnatus 'Purity'
From £2.24
approx 100 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 19 (19)
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)
Orlaya grandiflora

Best Seller

25% off

Orlaya grandiflora
From £2.17
approx 25 seeds
0.25 star 1 star 1 star 1 star 1 star 4.2 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)
Poppy field collection of annuals

Best Seller

25% off

Poppy field collection of annuals
£4.99 £3.74
1g packet | seeds
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)
Cosmos bipinnatus Rubenza

25% off

Cosmos bipinnatus 'Rubenza'
£2.49 £1.87
approx 30 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Elegant cutting garden collection

25% off

Elegant cutting garden collection
£13.16 £9.87
1 × collection
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 (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 (1)
Gaillardia × grandiflora Burgunder

25% off

Gaillardia × grandiflora 'Burgunder'
From £2.24
approx 20 seeds
9cm pot
3 × 9cm pots
1 star 1 star 1 star 1 star 1 star (1)
Helichrysum Eternity Mix

25% off

Helichrysum 'Eternity Mix'
£2.49 £1.87
approx 350 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 Mollie Rilstone

25% off

Lathyrus odoratus 'Mollie Rilstone'
From £2.47
approx 20 seeds
Lathyrus odoratus Painted Lady

25% off

Lathyrus odoratus 'Painted Lady'
From £2.62
approx 20 seeds
0 star 0 star 1 star 1 star 1 star (1)
Lathyrus odoratus Winston Churchill

25% off

Lathyrus odoratus 'Winston Churchill'
From £2.62
approx 20 seeds
Nicotiana sylvestris

25% off

Nicotiana sylvestris
£2.79 £2.09
approx 450 seeds
0.5 star 1 star 1 star 1 star 1 star (5)
Nigella damascena Oxford Blue

25% off

Nigella damascena 'Oxford Blue'
£2.79 £2.09
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 Midnight

25% off

Nigella papillosa 'Midnight'
£2.99 £2.24
approx 500 seeds
Rudbeckia hirta Cherry Brandy

New

25% off

Rudbeckia hirta 'Cherry Brandy'
£3.49 £2.62
approx 25 seeds
Rudbeckia hirta Marmalade

New

25% off

Rudbeckia hirta 'Marmalade'
£2.99 £2.24
approx 450 seeds
Silene coronaria

25% off

Silene coronaria
From £1.87
approx 50 seeds
0 star 0.75 star 1 star 1 star 1 star (3)
Limonium sinuatum QIS Apricot

25% off

statice 'Apricot'
£4.79 £3.59
approx 100 seeds
Limonium sinuatum QIS White

25% off

statice 'White'
£3.49 £2.62
approx 100 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)
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
Linaria purpurea Canon Went

25% off

Linaria purpurea 'Canon Went'
From £2.24
9cm pot
3 × 9cm pots
6 × 9cm pots
0.5 star 1 star 1 star 1 star 1 star (2)
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
Consolida regalis QIS Rose

25% off

Consolida regalis 'QIS Rose'
£2.99 £2.24
approx 200 seeds
Lathyrus odoratus High Scent

25% off

Lathyrus odoratus 'High Scent'
£4.79 £3.59
approx 20 seeds
Blue and white cutting garden collection

25% off

Blue & white cutting garden collection
£11.36 £8.52
1 × collection
Cherry creme brûlée cutting garden collection

25% off

Cherry créme brûlée cutting garden collection
£25.33 £19.00
1 × collection
Simple white cutting garden collection

25% off

Simple white cutting garden collection
£5.88 £4.41
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
Lepidium sativum

25% off

Lepidium sativum
£2.99 £2.24
approx 4500 seeds
Heritage sweet pea seed gift box

25% off

Heritage sweet pea seed gift box
£22.99 £17.24
gift set
Ligusticopsis wallichiana

New

Ligusticopsis wallichiana
From £2.99
available to order from spring 2027
1 star 1 star 1 star 1 star 1 star (9)
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)
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
Strongly-scented sweet pea collection
Strongly-scented sweet pea collection
£9.27 £6.80
available to order from autumn
Echinacea purpurea Magnus Superior

New

Echinacea purpurea 'Magnus Superior'
£3.49 £2.62
available to order from autumn
Rudbeckia triloba Prairie Glow

New

Rudbeckia triloba 'Prairie Glow'
£3.99 £2.99
available to order from autumn
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
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)
Geranium Maderense

New

Geranium Maderense
From £2.62
available to order from autumn

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.