Plants by mail order since 1984, over 4100 plants online today!
- Shop Now
- Burncoose Specialities
- This Month
- Offers & Promotions
- RHS Chelsea Flower Show 2022
- Engage With Us
- Information, Help & Advice
- About Us & Our Services
- Terms & Conditions
- Log In / Register
LOBELIA siphilitica
Commonly known as Blue cardinal flower
Clear blue
Further Reading....
-
BlueClear blue -
Height60-120cm (24-48in) -
Spread30cm (12in)
-
HerbaceousEarly in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.Clump-forming perennial with erect, leafy stems. Toothed leaves can be oval, broadly lance-shaped or oblong. They are 10-15cm (4-6in) long, light-green and softly hairy. Produces long-lasting, tubular, 2-lipped flowers 2.5-3.5cm (1-1½in) across
-
Hardy - average winterHardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F) -
Full sun -
Partial shade -
Caution, toxic if eaten, may cause skin allergy or irritantThese plants are toxic if eaten and may also cause a skin allergy, rash, irritation to eyes and skin.
LOBELIA siphilitica
-
Additional Features
Pests & DiseasesSlugs, leaf blotch.
Place of originEastern USA. -
Flower ShapeRacemesDense racemes 10-50cm (4-20in) longTubular
-
HardinessFrost hardy (down to -5)
-
Seasonal InterestSummer
-
Soil ConditionsFertile moist well-drained soil
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Herbaceous Plants - Video Collection
- Dividing Herbaceous Perennials - Video Tip ondemand_video
- Spring Planting Osteospermums - Video Tip ondemand_video
- Dividing Summer Perennials - Video Tip ondemand_video
- Dividing summer flowering Hemerocallis - Video Tip ondemand_video
- Summer propagation - Video Tip ondemand_video
- Self-seeding aquilegia - Video Tip ondemand_video
- Supporting Plants - Video Tip ondemand_video
- Dead heading meconopsis - Video Tip ondemand_video
- Dead heading Delphiniums - Video Tip ondemand_video
- Feeding herbaceous peonies - Video Tip ondemand_video
Lobelia - Care Guide
|
60-120cm (24-48in)
|
|
|
|
30cm (12in) |
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
Vermin & Pest Control
Slug Pellets
Slug killer blue mini pellets are easy to use and give effective control of slugs and snails.
Ideal in garden, conservatory or greenhouse.
Only £6.50
Vermin & Pest Control
Copper Tape
Quick and easy way to repel slugs and snails from your pots with this adhesive copper tape.
Only £7.50
Share this page
