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PENSTEMON 'Sour Grapes'
Commonly known as Beard tongue
Greyish-blue flowers suffused with rich purple and tinged green
Further Reading....
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Semi-evergreenKeeps some of its foliage all year, and will drop some leaves as well.Elliptic to narrowly ovate leaves 12cm (4¾in) long
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BlueGreyish blue with rich purple
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PurpleShades of purple/mauve/lilac/violet
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Height60cm (24in)
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Spread45cm (18in)
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HerbaceousEarly in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.Erect perennial
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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)
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Full sun
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Partial shade
PENSTEMON 'Sour Grapes'
- Details
- Description
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Additional FeaturesGood to knowWildlife plant - bees. Deadhead to prolong flowering. Leave foliage through winter for protection.Pests & DiseasesChrysanthemum eelworm, powdery mildewPlace of originGarden origin. Collected by Margery Fish, East Lambrook, Somerset, UKResistant to honey fungusThese plants have little or few problems with honey fungus.
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Flower ShapeBell/LanternPaniclesTubular5-7cm (2-3in) long
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Garden Location/ConditionsBorderSuitable for a mixed or herbaceous border
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HardinessFully hardy
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Seasonal InterestAutumnSummer
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Soil ConditionsFertile well drained soilGive winter mulch
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WildlifeBee friendly
Jan
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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
Penstemon - Growing Guide
60cm (24in)
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45cm (18in) |
Useful extras...
![](https://www.burncoose.co.uk/site/img/products/squaremedium/Vitax_Q4_6202.jpg)
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
![](https://www.burncoose.co.uk/site/img/products/squaremedium/grow_your_own_front_22.jpg)
Fertilisers & Feeds - Empathy
Afterplant - Grow Your Own
AFTER PLANT GROW YOUR OWN seaweed is ready to use liquid concentrate that was specially formulated be used on all edible plants.
Only £8.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/tomatoe_front.jpg)
Fertilisers & Feeds - Empathy
Afterplant - Tomatoes
AFTER PLANT TOMATO FEED Liquid Concentrate with Bio stimulant is a high potash liquid concentrate containing seaweed extract, plant derived amino acids and other nutrients specifically formulated to benefit tomatoes and greenhouse plants.
Only £8.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/rootgrow_6203.jpg)
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)
3 options from £3.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/RootgrowEricoid_6204.jpg)
Fertilisers & Feeds - Empathy
Rootgrow Ericoid mycorrhizal fungi
This specially adapted Rootgrow™ mycorrhizal fungi will boost the growth of acid-loving plants like rhododendrons, azaleas, heathers and blueberries.
It contains ericoid and arbuscular mycorrhizal fungi, which are found in poor acidic soils where ericaceous plants naturally grow.
Only £7.50
![](https://www.burncoose.co.uk/site/img/products/squaremedium/empathy-allpurpose_6208.jpg)
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