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Plants that Flower in September

The heat may be starting to fade, but that does not mean the colour should. Keep it fresh with asters, phlox and late-flowering anemones.

By type
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Evergreen / deciduous
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Used at RHS Chelsea Flower Show
Kitchen garden planting guidelines
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All items
Showing Flowering month : September clear all
371 items
Lathyrus odoratus Mollie Rilstone

20% off

Lathyrus odoratus 'Mollie Rilstone'
From £2.63
approx 20 seeds
Lathyrus odoratus Mrs Bernard Jones
Lathyrus odoratus 'Mrs Bernard Jones'
£3.29 £2.63
available to order from summer
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Lathyrus odoratus Midnight

20% off

Lathyrus odoratus 'Midnight'
From £2.63
approx 20 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 2 (2)
Lathyrus odoratus Dorothy Eckford
Lathyrus odoratus 'Dorothy Eckford'
£3.29 £2.63
available to order from summer
Cosmos bipinnatus Fizzy Rose Picotee (Fizzy Series)

Up to 50% off

Cosmos bipinnatus 'Fizzy Rose Picotee' (Fizzy Series)
From £2.63
approx 100 seeds
0 star 1 star 1 star 1 star 1 star 4.0 5 1 (1)
Cosmos bipinnatus Casanova Pink (Casanova Series)

20% off

Cosmos bipinnatus 'Casanova Pink' (Casanova Series)
£3.29 £2.63
approx 30 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Cosmos bipinnatus Fizzy White (Fizzy Series)

20% off

Cosmos bipinnatus 'Fizzy White' (Fizzy Series)
£3.29 £2.63
approx 100 seeds
Cobaea scandens
Cobaea scandens
£3.19 £2.55
available to order from summer
0 star 0 star 1 star 1 star 1 star 3.0 5 1 (1)
Knautia arvensis
Knautia arvensis
£2.99 £2.39
available to order from summer
0 star 0 star 0 star 1 star 1 star 2.0 5 2 (2)
Gaillardia × grandiflora Burgunder

20% off

Gaillardia × grandiflora 'Burgunder'
From £2.39
approx 20 seeds
9cm pot
3 × 9cm pots
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Lathyrus odoratus Noel Sutton

20% off

Lathyrus odoratus 'Noel Sutton'
From £2.39
approx 20 seeds
Lathyrus odoratus Windsor
Lathyrus odoratus 'Windsor'
£2.99 £2.39
available to order from summer
Cosmos bipinnatus Purity

Up to 50% off

Cosmos bipinnatus 'Purity'
From £2.39
approx 100 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 19 (19)
Salvia viridis

New

20% off

Salvia viridis
£2.99 £2.39
approx 300 seeds
Tagetes tenuifolia Golden Gem

20% off

Tagetes tenuifolia 'Golden Gem'
£2.99 £2.39
approx 225 seeds
Lathyrus odoratus Bobby's Girl
Lathyrus odoratus 'Bobby's Girl'
£2.99 £2.39
available to order from summer
Matthiola incana Pillow Talk

New

Matthiola incana 'Pillow Talk'
£2.99 £2.39
available to order from summer
Malva moschata

20% off

Malva moschata
£2.99 £2.39
approx 50 seeds
Campanula trachelium

20% off

Campanula trachelium
£2.99 £2.39
approx 150 seeds
Lathyrus odoratus Top Hat

20% off

Lathyrus odoratus 'Top Hat'
From £2.39
approx 20 seeds
Lathyrus odoratus Eclipse
Lathyrus odoratus 'Eclipse'
£2.99 £2.39
available to order from summer
Lathyrus odoratus Almost Black
Lathyrus odoratus 'Almost Black'
£2.99 £2.39
available to order from summer
chilli Trinidad Moruga Scorpion

40% off

chilli 'Trinidad Scorpion'
£3.99 £2.39
approx 5 seeds
Cosmos bipinnatus Apricota

Up to 40% off

Cosmos bipinnatus 'Apricota'
From £2.39
approx 50 seeds
0 star 0.25 star 1 star 1 star 1 star (3)
Tropaeolum Baby Rose

20% off

nasturtium - Tropaeolum 'Baby Rose'
£2.99 £2.39
approx 30 seeds
1 star 1 star 1 star 1 star 1 star (1)
Nepeta cataria

20% off

catnip
From £2.39
approx 150 seeds
9cm pot
2 + 1 FREE 9cm pots
0.5 star 1 star 1 star 1 star 1 star (2)
courgette Gold Rush

20% off

courgette 'Gold Rush' F1
£2.99 £2.39
approx 10 seeds
Lathyrus odoratus Jilly

20% off

Lathyrus odoratus 'Jilly'
£2.99 £2.39
approx 20 seeds
Antirrhinum majus Appleblossom

20% off

Antirrhinum majus 'Appleblossom'
From £2.39
approx 20 seeds
3 × packets of seeds
Callistephus chinensis Light Blue

20% off

Callistephus chinensis 'Light Blue'
£2.99 £2.39
approx 100 seeds
Cosmos bipinnatus Velouette

40% off

Cosmos bipinnatus 'Velouette'
£3.99 £2.39
approx 30 seeds
Matthiola longipetala subsp. bicornis

New

Matthiola longipetala subsp. bicornis
£2.99 £2.39
available to order from summer
Cosmos bipinnatus Sensation Pinkie (Sensation Series)

20% off

Cosmos bipinnatus 'Sensation Pinkie' (Sensation Series)
£2.99 £2.39
approx 100 seeds
Consolida regalis QIS Dark Blue

20% off

Consolida regalis 'QIS Dark Blue'
£2.99 £2.39
approx 200 seeds
Consolida regalis QIS Rose

20% off

Consolida regalis 'QIS Rose'
£2.99 £2.39
approx 200 seeds
Cosmos bipinnatus Seashells mixed

New

Cosmos bipinnatus 'Seashells mixed'
£2.99 £2.39
available to order from summer
Cosmos bipinnatus Candy Stripe

20% off

Cosmos bipinnatus 'Candy Stripe'
£2.99 £2.39
approx 100 seeds
1 star 1 star 1 star 1 star 1 star (1)
Cosmos bipinnatus Apricot Lemonade

New

Cosmos bipinnatus 'Apricot Lemonade'
From £2.39
available to order from summer
Lathyrus odoratus Old Fashioned mixed

New

20% off

sweet pea 'Old Fashioned mixed'
£2.99 £2.39
approx 30 seeds
Nigella Persian Jewels

New

20% off

Nigella 'Persian Jewels'
£2.99 £2.39
approx 500 seeds
Nicotiana × sanderae Perfume Deep Purple (Perfume Series)

New

Nicotiana × sanderae 'Perfume Deep Purple' (Perfume Series)
£2.99 £2.39
available to order from summer
Lathyrus odoratus Gwendoline

20% off

Lathyrus odoratus 'Gwendoline'
£2.89 £2.31
approx 20 seeds
1 star 1 star 1 star 1 star 1 star (6)
Ammi majus

Best Seller

Up to 50% off

Ammi majus
From £2.31
approx 500 seeds
3 × packets of seeds
0.5 star 1 star 1 star 1 star 1 star (5)
Tropaeolum majus Blue Pepe

20% off

nasturtium 'Blue Pepe'
£2.89 £2.31
approx 30 seeds
Thunbergia alata Susie Orange with Black Eye (Susie Series)

20% off

Thunbergia alata 'Susie Orange with Black Eye' (Susie Series)
£2.89 £2.31
approx 30 seeds
0 star 0 star 1 star 1 star 1 star (2)
Nicotiana sylvestris

20% off

Nicotiana sylvestris
£2.79 £2.23
approx 450 seeds
0.5 star 1 star 1 star 1 star 1 star (5)
Amaranthus caudatus

20% off

Amaranthus caudatus
£2.79 £2.23
approx 2200 seeds
1 star 1 star 1 star 1 star 1 star (2)
Nigella papillosa Delft Blue

Up to 50% off

Nigella papillosa 'Delft Blue'
From £2.23
approx 500 seeds
Oenothera lindheimeri The Bride

20% off

Oenothera lindheimeri 'The Bride'
£2.79 £2.23
approx 25 seeds
Callistephus chinensis King Size Apricot

20% off

Callistephus chinensis 'King Size Apricot'
£2.79 £2.23
approx 50 seeds
Tropaeolum majus Tip Top Apricot

New

nasturtium - Tropaeolum majus 'Tip Top Apricot'
£2.79 £2.23
available to order from summer
Tropaeolum majus Peach Melba

New

nasturtium - Tropaeolum majus 'Peach Melba'
£2.79 £2.23
available to order from summer
Tropaeolum majus Black Velvet (Tom Thumb Series)

20% off

nasturtium - Tropaeolum majus 'Black Velvet' (Tom Thumb Series)
£2.69 £2.15
approx 30 seeds
1 star 1 star 1 star 1 star 1 star (5)
Lathyrus odoratus var. nanellus Pink Cupid

20% off

Lathyrus odoratus var. nanellus 'Pink Cupid'
From £2.15
approx 20 seeds
Cosmos bipinnatus Cosimo Collarette (Cosimo Series)

Up to 40% off

Cosmos bipinnatus 'Cosimo Collarette' (Cosimo Series)
From £2.09
approx 30 seeds
9cm pot
2 + 1 FREE 9cm pots
0.75 star 1 star 1 star 1 star 1 star (3)
bean (climbing French) Sunshine

40% off

bean (climbing French) 'Sunshine'
£3.49 £2.09
approx 50 seeds
1 star 1 star 1 star 1 star 1 star (1)
Antirrhinum majus Madame Butterfly Red

40% off

Antirrhinum majus 'Madame Butterfly Red'
£3.49 £2.09
approx 25 seeds
Tropaeolum majus Alaska Series

20% off

nasturtium - Tropaeolum majus 'Alaska Series'
£2.49 £1.99
approx 40 seeds
1 star 1 star 1 star 1 star 1 star (3)
Tropaeolum majus Climbing Mixed

20% off

nasturtium - Tropaeolum majus 'Climbing Mixed'
From £1.99
approx 40 seeds
3 × packets of seeds
Cosmos bipinnatus Rubenza

20% off

Cosmos bipinnatus 'Rubenza'
£2.49 £1.99
approx 30 seeds
1 star 1 star 1 star 1 star 1 star (3)
Aster Duchess Mixed

20% off

Aster 'Duchess Mixed'
£2.49 £1.99
approx 200 seeds
Phlox drummondii Crème Brûlée

20% off

Phlox drummondii 'Crème Brûlée'
£2.49 £1.99
approx 200 seeds
1 star 1 star 1 star 1 star 1 star (1)
Tagetes patula Burning Embers

20% off

Tagetes patula 'Burning Embers'
£2.39 £1.91
approx 50 seeds
Nicotiana Lime Green

20% off

Nicotiana 'Lime Green'
£2.25 £1.80
approx 1600 seeds
Cosmos bipinnatus Dazzler

20% off

Cosmos bipinnatus 'Dazzler'
£2.25 £1.80
approx 100 seeds
0.25 star 1 star 1 star 1 star 1 star (3)
Ipomoea lobata

20% off

Ipomoea lobata
£2.25 £1.80
approx 20 seeds
Malope trifida Vulcan

20% off

Malope trifida 'Vulcan'
£2.25 £1.80
approx 70 seeds
Lathyrus odoratus Princess Elizabeth

Up to 40% off

Lathyrus odoratus 'Princess Elizabeth'
From £1.79
approx 20 seeds
Tropaeolum majus Red Troika

40% off

nasturtium - Tropaeolum majus 'Red Troika'
£2.99 £1.79
approx 25 seeds
1 star 1 star 1 star 1 star 1 star (1)
Tropaeolum majus Milkmaid
nasturtium - Tropaeolum majus 'Milkmaid'
£1.99 £1.59
available to order from summer
Antirrhinum majus Night and Day

40% off

Antirrhinum majus 'Night and Day'
£2.49 £1.49
approx 500 seeds
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