Penstemon 'Pensham Plum Jerkum'
A masterpiece in mauve
Grown by Mike's perennial specialists
UK
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Plant diary
- Flower
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Penstemon 'Pensham Plum Jerkum'
- With its purple trumpet-shaped flowers and dainty green foliage, you'd be hard-pressed to find a more beautiful penstemon if you tried.
- The white-throated bell blooms appear in abundance from the heart of summer right the way through into the autumn, nodding thoughtfully on maroon stems.
- Known for attracting pollinating insects like bees and butterflies, penstemons are actually one of the perennials featured on the RHS's Plants for Pollinators list.
- Did you know? The contrasting colour markings on the throats of the flower serves a biological purpose, helping guide pollinators in towards the flower's nectar.
- Please note: this page includes selected AI-assisted imagery for illustrative purposes.
What to expect
Supplied as
Eventual height
Flower colour
Habit
Hardiness
Spacing
Will this grow in my garden?
Can I grow this in a pot?
Yes, this penstemon grows well in 30cm pots, flowering for months in mild temperatures around 22°C.
How big does it get?
Tihs plant typically reaches a height of 70cm.
How much sunlight does this need?
This penstemon requires full sun or partial shade to flourish.
What kind of soil does this plant prefer?
This penstemon prefers moist but well-drained, fertile soil, adapting well to standard garden conditions.
How much watering does this plant need?
Water your penstemon regularly to keep the soil evenly moist, providing about 2.5cm of water weekly during the growing season, and slightly more when temperatures surpass 25°C.
Will this plant need pruning?
No strict pruning is required, but this penstemon generally benefits from deadheading faded flowers to encourage further blooming and cutting back dead foliage in late autumn or early spring.
How hardy is this plant?
Penstemon 'Pensham Plum Jerkum' is hardy through most of the UK in average winters (H4), withstanding temperatures down to -10°C, but benefits from a dry winter mulch in colder areas.
The wider garden
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Our perennial plants are raised by several of our most trusted UK growers, with only the very finest plants making the cut to be sent on to our Cotswolds nursery. Your perennials are double (then triple) checked over by our team – this is where being pernickety is a good thing – before being sent to you in the perfect condition for planting. Happy days.
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