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LOBELIA siphilitica
Commonly known as Blue cardinal flower
Clear blue
Full Plant Details - Sun/Soil & other attributes - Click to close
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Floweringlocal_floristJanlocal_floristFeblocal_floristMarlocal_floristAprlocal_floristMaylocal_floristJunlocal_floristJullocal_floristAuglocal_floristSeplocal_floristOctlocal_floristNovlocal_floristDec
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Pests & Diseases
Slugs, leaf blotch. -
Place of origin
Eastern USA. -
Blue
Clear blue -
RacemesDense racemes 10-50cm (4-20in) long
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Tubular
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BorderSuits a mixed or herbaceous border
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Fully hardy
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Height
60-120cm (24-48in) -
Spread
30cm (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
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Hardy - cold winter
Hardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F) -
Summer Seasonal Interest
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Fertile moist well-drained soil
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Full sun
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Partial shade
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harmful if eaten
People and pets, i.e. cats, dogs, rabbits, rodents, notably dogs and cats -
skin irritant
People and pets, i.e. cats, dogs, rabbits, rodents, notably dogs and cats -
Mature Size60-120cm (24-48in)
30cm (12in)
View Detailed Plant Description
View Planting Tips and Care Advice
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
- Overpotting Problems - Video Tip ondemand_video
Lobelia - Care Guide
View Planting Combinations
