Pretty rich-red, bell shaped flowers with white-streaked throats carried above lance-shaped mid-green foliage from June to September. Height 75cm. Spread 40cm. Prefers full sun and fertile, moist, well-drained soil. Hardy.
Penstemon ‘Windsor Red’ is a long-flowering perennial with rich red bell-shaped flowers, perfect for sunny borders and cottage garden planting.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: Plant Penstemon ‘Windsor Red’ in spring when the soil is workable and beginning to warm, allowing roots to establish before active growth.
Early Autumn: Early autumn planting is also suitable, giving your Penstemon time to establish before the next growing season.
Site Selection
Sunlight: Penstemon prefers a position in full sun for the best flowering and compact growth.
Soil: Fertile, moist, well-drained soil is ideal. Improve soil with compost or well-rotted organic matter before planting.
Planting Instructions
Prepare the Hole: Dig a hole twice the width and the same depth as the root ball.
Soil Preparation: Mix compost or organic matter into the excavated soil to improve fertility and drainage.
Planting: Place your Penstemon in the hole so the top of the root ball is level with the soil surface, then backfill and firm gently.
Watering After Planting: Water thoroughly after planting to help Penstemon ‘Windsor Red’ establish quickly.
Watering Requirements
Growing Season: Keep soil evenly moist while your Penstemon is actively growing and flowering.
Dormant Season: Reduce watering when growth slows, but do not allow the soil to dry out completely.
Feeding
Spring: Apply a balanced fertiliser in spring to encourage healthy growth and flowering.
Mid-Season: A light feed during the flowering period will help your Penstemon continue producing blooms.
Pruning and Maintenance
Deadheading: Remove faded flower spikes regularly to encourage more blooms and keep Penstemon ‘Windsor Red’ tidy.
Seasonal Care: Lightly trim plants after flowering to maintain shape and encourage fresh growth.
Mulching
Spring: Apply organic mulch around the base to retain moisture and suppress weeds.
Later in the Year: Mulching helps improve soil structure and supports healthy root development.
Final Tips
Penstemon ‘Windsor Red’ is an easy, colourful perennial ideal for borders and pollinator-friendly gardens. With full sun, fertile soil, and regular deadheading, this Penstemon will provide flowers throughout summer.
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Amanda Boikovs (verified owner) –
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