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Lobelia x speciosa 'Fan Scharlach' (Lobelia 'Fan Scharlach')

Other names: Lobelia Fan Scarlet, Lobelia 'Cinnabar Red'

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Variety or Cultivar
'Fan Scharlach', part of the 'Fan' Mix, is an herbaceous perennial, although as it is tender in some parts, is also grown as an annual. It has bronze-tinted, dark-green, oblong leaves and in summer and autumn, bears spikes of densly-packed, bright-red flowers on leafy stems.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
0.5 m 0.5 m 1-2 years
1 ft 1 ft 1-2 years

Where to grow

Soil type
  • Clay
  • Loamy
Soil drainage
  • Moist but well-drained
  • Well-drained
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Sun
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Plant in full sun or partial shade in fertile, moist soil. To boost growth, apply a balanced fertiliser fortnightly until mid-summer, changing to a low nitrogen fertiliser to promote flowers.

Suggested uses

Containers/Patio, Beds and borders, Cottage/Informal

UK hardiness

H5

USDA zones

Zone 7, Zone 8, Zone 9, Zone 10

Sunset zone

2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Upright, Clump-forming

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Severe discomfort may result if ingested

Plant care

Pruning

Propagation methods

Seed

Pests

Slugs

Diseases

Generally disease-free

Cut plants to ground level (optional)

Cut back after flowering in early autumn (optional)

Fertilise regularly with liquid feed

Protect in winter with dry mulch (in cold areas)

Apply balanced fertiliser in early summer

Plant in fertile, moisture retentive soil

Other plants

Plants in this Genus (0)

Lobelia

Companion plants (0)

Related content

Discuss Lobelia x speciosa 'Fan Scharlach' with other Shoot members

Re: Lobelia fan scarlet - not growing well

Kathy N
1330 0
Hi, Heidi,
It could be a number of things. First, Lobelia x speciosa 'Fan Scharlach' is borderline hardy so if they were hit by cold/freezing/frosty conditions, they are showing the effects. Also, it is best to cut this plant back in autumn - it will then send up fresh, new growth in spring. Finally, they like consistently moist conditions and benefit from regualr feeding starting now. If you haven't already, add this to your 'Plants I Have' list (you have to log in) and you will get detailed monthly care instructions on what to do for it and when.
Kathy C
Posted: Wednesday 27th of April 2011 10:32 PM

Lobelia fan scarlet - not growing well

Shoot User
1330 1
I planted two lobelia fan scarlet last Summer. They have both started to grow but not well. The leaves are pale rather than deep. I thought it might be a slug problem but slug pellets don't seem to show sign of slugs.

I have put bark down. Could that be a problem? One plant is in sunshine and the other is mostly in shade. They both look identical. We also have two cats that have to use our small garden!! Could the acid be a problem? Can anyone advise?

Heidi
Posted: Monday 25th of April 2011 01:05 PM Last reply: Saturday 1st of March 2025 01:49 PM
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