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Penstemon Sour Grapes 3L


Out of stock

Great for wildlife
July - September
80cm x 50cm
Partial Shade, Sun
Attracts Wildlife
Half Hardy

Penstemon are short-lived summer flowering perennials grown for their long-flowering season and popularity with the bees. Also known as Beardtongue, their tubular flowers look similar to those of a Foxglove. ‘Sour Grapes’ is one of the best known Penstemon varieties. Clusters of nectar rich, greyish-blue flowers with a pink blush appear on sturdy stems. Great in borders, rock gardens, along walkways or in containers. Makes a nice cut flower.

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Additional information

Plant Type
Flower Colour
Fully Grown Size
Garden Position
Light Level
RHS Plants For Pollinators
RHS Garden Merit Award
Pot Size


Penstemons are happy in full sun or partial shade in moist, well-drained soils, but will not tolerate particularly wet clay soils. To improve your soil you can add grit and extra organic matter to help with drainage. Water at least once a week during summer months, but much less during cooler periods - you can reduce watering once established. Mulch annually with well-rotted manure or leaf mould, and feed weekly in summer with a liquid fertiliser. Penstemons are short-lived perennials that can suffer in winter. To avoid losses, don’t cut back plants until spring. Take summer cuttings to prevent winter losses.  

Planting Conditions

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Watering & Feeding

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General Care

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