loading
Close
Sort by
Show
By type
Facing
How much sun
Soil type
Special conditions
Flower colour
Evergreen / deciduous
Fragrance
Attractive to wildlife
Quick growing
Eventual size
Indoor plants by room
Bulb planting time
Bulb divisions
Depth of water
Bedding planting time
Chelsea plant of year
Sowing month inside or protected
Sowing month outside
Vegetable harvesting month
Vegetable groups
Multibuy packs
Plant me now
Planting combinations
Sale
Plant Seasons
RHS Spring catalogue 2021
RHS Summer catalogue 2021
RHS Autumn catalogue 2021
Hardy
Leaf colour
Ground cover
Position
Shape
Soil moisture
Kitchen garden planting guidelines

Plants that Flower in September

Results found: 1800
RHS award of garden merit
Buddleja davidii Black Knight

30% off

From £13.99
View options
Pollinator
Calamintha nepeta subsp. nepeta Blue Cloud
From £9.99
View options
Calibrachoa Can-can Double OrangeTastic (Can-can Series)

40% off

From £4.19
View options
Calibrachoa Can-can Double Provence Blue (Can-can Series)

40% off

From £4.19
View options
RHS award of garden merit
Calibrachoa Cabaret Bright Red ('Balcabrite') (PBR) (Cabaret Series)

40% off

From £4.19
View options
RHS award of garden merit
Calluna vulgaris Dark Beauty
From £8.99
View options
Pollinator
Campanula Rebelle

30% off

From £9.09
View options
Campanula Sarastro
From £8.99
View options
Pollinator
Campanula carpatica Blaue Clips
From £7.99
View options
Pollinator
Campanula carpatica f. alba Weisse Clips
From £7.99
View options
RHS award of garden merit
Campanula lactiflora Prichard's Variety

30% off

From £6.29
View options
Pollinator
Campanula poscharskyana
From £8.99
View options
New
Carex buchananii Red Rooster
From £9.99
View options
RHS award of garden merit
Caryopteris x clandonensis Kew Blue
From £8.99
View options
Pollinator
Caryopteris × clandonensis Heavenly Blue

40% off

From £8.99
View options
RHS award of garden merit
Cenolophium denudatum
From £14.99
View options
Pollinator
Centranthus ruber
From £7.99
View options
Pollinator
Centranthus ruber Albus
From £7.99
View options
RHS award of garden merit
Ceratostigma plumbaginoides

30% off

From £6.29
View options
Chamaenerion angustifolium Album
From £14.99
View options
RHS award of garden merit
Choisya ternata Sundance ('Lich')

40% off

From £15.59
View options
RHS award of garden merit
Choisya × dewitteana White Dazzler ('Londaz') (PBR)

Up to 30%

From £17.32
View options
Pollinator
Chrysanthemum Clara Curtis
From £9.99
View options
Pollinator
Chrysanthemum Dr Tom Parr
From £9.99
View options
Pollinator
Cirsium rivulare Trevors Felley Find (PBR)
From £9.99
View options
Clematis Bees Jubilee
From £14.99
View options
RHS award of garden merit
Clematis Daniel Deronda
From £14.99
View options
RHS award of garden merit
Clematis Madame Julia Correvon
From £14.99
View options
Clematis Miss Bateman
From £14.99
View options
RHS award of garden merit
Clematis Mrs Cholmondeley

20% off

From £11.99
View options
RHS award of garden merit
Clematis Purpurea Plena Elegans
From £17.99
View options
Clematis Romantika
From £14.99
View options
RHS award of garden merit
Clematis Warszawska Nike
From £14.99
View options
RHS award of garden merit
Clematis Josephine ('Evijohill') (PBR)
From £17.99
View options
RHS award of garden merit
Clematis × triternata Rubromarginata
From £17.99
View options
Pollinator
Coreopsis Ladybird
From £8.99
View options
Pollinator
Coreopsis verticillata Moonbeam
From £8.99
View options
Cosmos atrosanguineus

40% off

From £5.39
View options
New
Cosmos atrosanguineus Cherry Chocolate ('Vg001') (PBR)

20% off

From £9.99
View options
Cosmos atrosanguineus Chocamocha ('Thomocha') (PBR)

20% off

From £7.99
View options
RHS award of garden merit
Crocosmia Lucifer
From £5.99
View options
RHS award of garden merit
Cyclamen cilicium

40% off

From £6.59
View options
RHS award of garden merit
Cynara cardunculus

20% off

From £7.99
View options
Dahlia Apache

20% off

From £14.39
View options
Pollinator
Dahlia Cornel

30% off

From £12.59
View options
Dahlia Vancouver
From £17.99
View options
Delosperma cooperi Hot Pink Wonder ('Wowdry1') (PBR) (Wheels of Wonder Series)

20% off

From £6.39
View options
Delosperma cooperi Jewel of Desert Garnet (PBR) (Jewel of Desert Series)
From £7.99
View options
Become an RHS Member today and save 25% on your first year