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LOBELIA siphilitica
Commonly known as Blue cardinal flower
Clear blue
Further Reading....
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Blue - clear blue -
Height - 60-120cm (24-48in) -
Spread - 30cm (12in)
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Herbaceous - Early 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
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Hardy - average winter - Hardy 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 irritant - These plants are toxic if eaten and may also cause a skin allergy, rash, irritation to eyes and skin. -
Additional Features - Pests & Diseases - - slugs, leaf blotch. -
Place of origin - eastern USA. -
Flower Shape - Racemes - - dense racemes 10-50cm (4-20in) long
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Tubular
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Hardiness - Frost hardy (down to -5) -
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Seasonal Interest - Summer -
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Soil Conditions - Fertile 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
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60-120cm (24-48in)
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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
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