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Penstemon hartwegii (Scarlet beard tongue)

Beginner
skill rating
1 hour care
per year
0.7m
Max height
0.5m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Penstemon hartwegii

Other names

Scarlet beard tongue, Hartweg penstemon

Genus

Penstemon Penstemon

Species

P. hartwegii - P. hartwegii is a semi-evergreen perennial with narrow foliage and sturdy purple. stems which carry pink and white flowers in late summer.


Penstemon hartwegii is: Semi evergreen

Habit

Bushy

Awards

RHS AGM (Award of Garden Merit)

Flower

Bright-red, White in Summer; White, Bright-red in Autumn

Foliage

Green in Summer; Green in Autumn

How to care

Watch out for

Specific pests

Leaf and bud eelworms , Slugs , Snails Leaf and bud eelworms , Slugs , Snails

Downy mildew Downy mildew

General care

Pruning

Deadhead after flowering to maintain the plant's strength. Cut the plant right back to its base in winter.

Propagation methods

Division, Semi-hardwood cuttings, Softwood cuttings


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Where to grow

Penstemon hartwegii (Scarlet beard tongue) will reach a height of 0.7m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal

Cultivation

Plant in fertile, well-drained soil, in a sheltered position, in full sun or part shade. Protect plant in winter with a dry winter mulch.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Tender in frost (H3), Hardy (H4)

Companion plants

Botanical name

Penstemon hartwegii

Other names

Scarlet beard tongue, Hartweg penstemon

Genus

Penstemon Penstemon

Species

P. hartwegii - P. hartwegii is a semi-evergreen perennial with narrow foliage and sturdy purple. stems which carry pink and white flowers in late summer.

Foliage

Semi evergreen

Habit

Bushy

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Bright-red, White in Summer; White, Bright-red in Autumn

Foliage

Green in Summer; Green in Autumn


How to care

Watch out for

Specific pests

Leaf and bud eelworms , Slugs , Snails

Specific diseases

Downy mildew

General care

Pruning

Deadhead after flowering to maintain the plant's strength. Cut the plant right back to its base in winter.

Propagation methods

Division, Semi-hardwood cuttings, Softwood cuttings


Monthly care advice


Where to grow

Penstemon hartwegii (Scarlet beard tongue) will reach a height of 0.7m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal

Cultivation

Plant in fertile, well-drained soil, in a sheltered position, in full sun or part shade. Protect plant in winter with a dry winter mulch.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Tender in frost (H3), Hardy (H4)

USDA zones

Zone 10, Zone 9

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This plant likes... Garden match
Soil types: Chalky, Loamy, Sandy Tell us...
Soil drainage: Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Tender in frost (H3), Hardy (H4) Tell us...

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