Buy - Flowering month: September, Collections: Selected perennials, ferns & grasses - RHS Plants

Offers
Weekly offers

Summer bulbs: 20% off

Hydrangeas: 20% off

Selected vegetables: Up to 35% off

Flowering houseplants: 10% off

Indoor pots: 10% off

Seeds: 20% off

Potting & propagating: 10% off

*selected lines
Multibuys

Summer bulb collections

Perennials

Shrubs

Grasses

Garden mulch
Last chance

Last chance to buy plants

Last chance to buy tools & outdoor living

Bare root clearance
20%
OFF

Summer bulbs
Plants
Outdoor plants by type

Perennials

Shrubs

Climbers

Bulbs

Bedding plants

Mature shrubs

Grasses

Trees

Fruit trees & bushes

Ferns

Roses

Shop all outdoor plants
Seasonal plants

New in

Bare root plants

Hedging

Seeds

Dahlia bulbs

Flowers by month

March

April

May
Plants for pollinators

Shrubs

Perennials

Climbers

Grow your own

Seeds

Shop all

AGM

AGM Plants

Shop all
20%
OFF
with code
HYDRA20

Hydrangeas
Bulbs
Summer bulbs by type

Dahlias

Bulb collections

Peonies

Lilies

Crocosmias

Anemones

Gladioli

Irises

Potted bulbs

Shop all bulbs
Shop by colour

Pink

Red

White

Purple

Yellow

Blue
Planting essentials

Planting tools

Planting kit
3 for 2
SELECTED

Bulb collections
Indoor Plants
By type

Gifting

Luxury orchids

Orchids under £50

Foliage

Flowering

Scented

Ferns

Terrarium

Trailing & hanging

Shop all indoor plants
Shop by room

Bathrooms

Bedrooms

Hallways & landings

Kitchens

Living spaces

Offices

Shop by light

Direct sunlight

Indirect sunlight

Shade
Plant care and accessories

Indoor plant care

Orchid pots & care

Terrariums & accessories

Indoor plant pots

Indoor plant gifts

Shop our favourites

Air plants

Easy care
All indoor plants
Pots
Outdoor pots by type

New in

RHS endorsed

Window boxes & troughs

Raised beds

Wall planters

Hanging baskets & accessories

Grow pots & trays

Bowls

Shop all outdoor pots
Outdoor pots by material

Terracotta

Metal

Glazed

Composite

Wood & rattan

Shop by size

Small (Ø <30cm)

Medium (Ø 30-50cm)

Large (Ø 50-70cm)

Extra large (Ø 70cm+)
Inspiration

Statement pots

Heritage style pots

Handthrown terracotta

Lightweight pots

Plant & pot combinations

Round & tapered

Square & cube

Pot accessories

Plant Stands
Indoor pots by type

New pots

Plant & pot combinations

Large indoor pots

Hanging pots

Indoor plant bowls

Vases & jugs

Terrariums & accessories

Shop all indoor pots
Tool Shed
Garden equipment

New in

Compost, bark & mulch

Fertilisers & weed control

Composting

Irrigation & watering

Water butts

Clothing & accessories

Garden tidy & storage

Boot room & fireside

Shop all tool shed
Garden tools

New tools

Cutting & pruning tools

Digging

Weeding tools

Bulb planting tools

Tool care and accessories

Potting & propagating

Cold frames & growhouses

Grow pots & trays

Accessories

Shop all potting & propagating
Plant protection

Cloches

Mesh, netting & fleece

Cages & tunnels

Plant support

Plant support & obelisks

Arches & structures

Landscaping

Raised beds

Screening & trellis

Lawn care
RHS approved
Outdoor Living
Outdoor living

New in

Fire pits

Barbecues & pizza ovens

Water features

Furniture

Lounge sets

Dining sets

Shade

Hammocks & swing seats

Garden chairs & loungers

Shop all furniture
Lighting

Festoon and string lights

Solar lighting

Tealights holders & lanterns

Path & stake lights

Decorative lights

Birdcare & wildlife

Bird feeders

Bird baths & tables

Bird houses

Insects & wildlife
Accessories

Plant stakes & markers

Ornaments

Wind spinners

Clocks & weather instruments

Picnic and games

Shop all accessories
Lighting
Grow Your Own
Fruit

Fruit trees

Apples

Strawberries

Grapes

Cherries

Pears

Plums

Shop all fruit
Vegetables

Heritage

Herbs

Beans

Tomatoes

Chillies & peppers

Carrots

Courgette & marrows

Lettuce

Mushroom

Shop all vegetables
Planting essentials

Plant protection

Potting & propagating

Cold frames & growhouses
Planting kit
Gifting
RHS curated gifts

Gifts for him

Gifts for her

Indoor gardener

Creative gardener

Gardener who has everything

Trending
Gifting ideas

Indoor plants

Budding gardeners

Experienced gardeners

Under £20

Under £50

Under £100
RHS Gift Cards

RHS Gift Cards

Email an eGift Card

Post a physical Gift Card
Gifts for Mother's Day
Basket

Menu

Shop

Offers
Plants
Bulbs
Indoor plants
Pots
Tool shed
Outdoor living
Grow Your Own
Gifting

Information & Help

Deliveries
Returns

My account

Sign in

Popular searches

Plant types

Plants
- Dahlias
- Hellebores
- Summer bulbs
- Cyclamen
- Cornus

Gifting

Tools & essentials

Plant types

Plants
- Dahlias
- Hellebores
- Summer bulbs
- Cyclamen
- Cornus

Gifting

Tools & essentials

Items Categories Suggestions

5 year plant guarantee
Your purchase supports our charitable work. Thank you!
£2.99 seed only delivery
Basket

20% off hydrangeas. Use code: HYDRA20

RHS Plants Home

Show all filters

Sort by

Availability

Lowest price

Highest price

Name

Show

All items

Available items

Flowering month : September
Collections : Selected perennials, ferns & grasses

By type

Plants (465)

Facing

East (205)

North (66)

South (437)

West (446)

How much sun

Light shade (212)

Shade (11)

Sun (444)

Soil type

Acid (288)

Chalky (376)

Haven't a clue (191)

Heavy clay (278)

Light sandy (411)

Moderately fertile, moist but well-drained soil, or peat-free general purpose compost (79)

Moderately fertile, moist, but well-drained soil, or general-purpose loam-based potting compost (10)

Normal (455)

Peat-free general-purpose compost (12)

Prefers acid soil (1)

Reliably damp or boggy soil (1)

Special conditions

Boggy or damp shade (6)

Coastal conditions (47)

Dry shade (14)

Dry sun (128)

Exposed positions (19)

Tolerate air pollution (4)

Tolerates drought (155)

Flower colour

Black (4)

Blue (55)

Brown (1)

Colourful collections / bicolours (23)

Green (13)

Orange (34)

Pink (135)

Purple (89)

Red (68)

White (87)

Yellow (39)

Evergreen / deciduous

Deciduous (404)

Evergreen (44)

Semi-evergreen (63)

Fragrance

All scented flowers (27)

Aromatic foliage (77)

Evening scent (3)

Highly scented (4)

Attractive to wildlife

Attractive to birds (13)

Attractive to butterflies and moths (96)

Attractive to pollinators (264)

Attractive to wildlife (259)

RHS Plants for pollinators (282)

Quick growing

No (9)

Quite (370)

Yes (136)

Eventual size

Large (93)

Medium (289)

Small (169)

Bulb divisions

Dahlia (Division 1) Single-flowered (6)

Dahlia (Division 10) Miscellaneous (1)

Dahlia (Division 11) Fimbriated (1)

Dahlia (Division 12) Star (2)

Dahlia (Division 14) Paeony-flowered (2)

Dahlia (Division 2) Anemone-flowered (3)

Dahlia (Division 3) Collerette (1)

Dahlia (Division 5) Decorative (10)

Dahlia (Division 6) Ball (2)

Dahlia (Division 8) Cactus (1)

Dahlia (Division 9) Semi cactus (4)

Bedding planting time

Autumn & winter planting bedding (1)

Spring & summer planting bedding (2)

Chelsea plant of year

2011 (1)

2019 (1)

Centenary (2)

Sowing month inside or protected

January (1)

February (8)

March (7)

April (7)

May (3)

August (1)

September (2)

October (2)

November (1)

Sowing month outside

February (1)

March (3)

April (5)

May (7)

June (1)

August (1)

September (2)

October (3)

Multibuy packs

6 packs (247)

Selected offers (427)

Plant me now

April (2)

February (1)

July (9)

June (8)

Late Summer (1)

March (4)

May (6)

November (2)

October (1)

Planting combinations

Acid shade plant combination (1)

Agastache and Angelica plant combination (2)

Agastache and Echinops plant combination (1)

Agastache and Helenium plant combination (1)

Aquilegia and Anemanthele plant combination (1)

Astrantia and Digitalis plant combination (1)

Chelsea favourites plant combination (1)

Contemporary plant combination (3)

Cool tones plant combination (2)

Create a praire plant combination (3)

Create a prairie plant combination (3)

Cutting garden plant combination (1)

Damp shade plant combination (1)

Dazzle plant combination (1)

Dazzling colour weed-smothering plant combination (3)

Drought tolerant plant combination (1)

Dry sun plant combination (2)

Echinops and Achillea plant combination (1)

Echinops and Salvia plant combination (1)

Evergreen groundcover plant combination (1)

Golden prairie plant combination (2)

Green and white plant combination (2)

Heliopsis and Miscanthus plant combination (2)

Henry Agg Dog friendly plants (5)

Inula and Persicaria plant combination (1)

Kniphofia and Achillea plant combination (1)

Less is more plant combination (1)

Long flowering plant combination (3)

Low maintenance gems plant combination (3)

Lythrum and Campanula plant combination (1)

Moisture plant combination (1)

Oenothera and Perovskia plant combination (1)

Opposites attract plant combination (1)

Persicaria and Echinacea plant combination (2)

Pimpinella and Pennisetum plant combination (1)

Pink and purple long-flowering plant combination (2)

Pink and purple plant combination (1)

Pinks and purples plant combination (1)

Plants for pollinators plant combination (4)

Prairie plant combination (1)

Purple and gold plant combination (2)

Red and orange plant combination (4)

Rich tones slug resistant plant combination (1)

Sanguisorba and Calamagrostis plant combination (1)

Sedum and Aster plant combination (2)

Self seeding seed combination (1)

Shady clay plant combination (1)

Slug resistant plant combination (1)

Spires and spots plant combination (2)

Stars of the show plant combination (1)

Structural green and white plant combination (1)

Summer sizzlers plant combination (3)

Sunny chalk plant combination (1)

Sunny clay plant combination (2)

The Highgrove Kitchen Garden Collection (8)

Vibrant colour for bees plant combination (1)

Woodsmoke plant combination (2)

Year round groundcover plant combination (1)

Yellow and gold plant combination (3)

Plant Seasons

Grasses semi (4)

Grasses (39)

Perennials semi (68)

Perennials (319)

Shrubs (1)

border / combi (4)

bulbs die back after flowering (31)

RHS Spring catalogue 2021

10-11 Foliage & form (2)

13 New season essentials (1)

16 Long flowering (5)

17 Low maintenance (2)

2-3 Cottage garden plants (8)

20 Award-winning plants (2)

4-5 Plants for pollinators (7)

6-7 Border favourites (5)

8-9 The scented garden (3)

RHS Summer catalogue 2021

page 14-15 The night garden (3)

page 16 Low maintenance (5)

page 17 Summer scent (1)

page 2-3 Feel the heat (11)

page 20 Highly recommended (5)

page 4 -5 Cool tones (5)

page 6 -7 Plants for pollinators (10)

RHS Autumn catalogue 2021

Award-winning prairie-style plants - pages 14-15 (8)

Extend the season - pages 16 (5)

Planting in abundance - pages 8-9 (9)

Hardy

No (6)

Semi (163)

Yes (308)

Leaf colour

Blue (15)

Bronze (15)

Green (420)

Purple (26)

Red (7)

Silver (14)

Variegated (18)

Yellow (2)

Ground cover

No (372)

Yes (101)

Position

Arches & pergolas (1)

Back of border (85)

Bottom of hedges (7)

Front of border (193)

Middle of border (265)

Next to a patio (80)

Next to a pond (13)

Next to an entrance (71)

Next to seating areas (112)

Steep banks (33)

Walls & fences (1)

Shape

Ball (13)

Fountain (29)

Hummock (3)

Soil moisture

Damp (22)

Dry/Sandy (217)

Normal (450)

Kitchen garden planting guidelines

Suitable for grow beds (1)

Suitable for large container gardening (2)

Use cloche (1)

Results found: 465

Penstemon Midnight

Penstemon 'Midnight'

From £8.99

View options

9cm pot	£8.99
3 × 9cm pots	£19.99
6 × 9cm pots	£33.99

Penstemon Pensham Bilberry Ice (Pensham Series)

Penstemon 'Pensham Bilberry Ice' (Pensham Series)

From £8.99

View options

9cm pot	£8.99
3 × 9cm pots	£19.99
6 × 9cm pots	£33.99

Penstemon Pensham Wedding Day (Pensham Series)

Penstemon 'Pensham Wedding Day (Pensham Series)

From £8.99

View options

9cm pot	£8.99
3 × 9cm pots	£19.99
6 × 9cm pots	£33.99

Penstemon Summertime Pink

Penstemon 'Summertime Pink'

From £8.99

View options

9cm pot	£8.99
3 × 9cm pots	£19.99
6 × 9cm pots	£33.99

Penstemon heterophyllus Heavenly Blue

Penstemon heterophyllus 'Heavenly Blue'

From £8.99

View options

9cm pot	£8.99
3 × 9cm pots	£19.99
6 × 9cm pots	£33.99

1 ... 22 23 24

was added to your wheelbarrow

Become an RHS Member today and save 25% on your first year

Join now

Keep in touch

Get the latest from RHS Plants, including offers and inspiration. Plus - save 10% off your first order when you sign up.

View our Privacy Policy

View our Privacy Policy

Help & information

Delivery
Returns
FAQs
Plant FAQs
Contact Us
Pot Size Guide

More from the RHS

RHS.org Home
RHS Membership
RHS Gardens
RHS Flower Shows
RHS Garden Centres
Donate

Terms

Terms & Conditions
Privacy Policy
Cookie Policy

© RHS Enterprises Limited 2026
Registered in England & Wales No. 01211648. | VAT No. GB461532757 | Registered Office: 80 Vincent Square, London, SW1P 2PE.

All sales help fund the charitable work of the RHS.

© RHS Enterprises Limited 2026
Registered in England & Wales No. 01211648. | VAT No. GB461532757 | Registered Office: 80 Vincent Square, London, SW1P 2PE.

All sales help fund the charitable work of the RHS.