Penstemon 'Garnet'
PGN Penstemon 'Garnet'
PGN Penstemon 'Garnet'
PGN Penstemon 'Garnet'
Penstemon 'Garnet'
Penstemon 'Garnet'
Penstemon 'Garnet'
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Penstemon ‘Garnet’

Penstemon 'Garnet'

(1 customer review)

Penstemon ‘Garnet’ is a striking perennial with vibrant deep red to burgundy tubular flowers that bloom in late spring to early summer. Growing 0.5-1m tall and up to 50cm wide, it forms a compact, bushy mound with dark green, lance-shaped leaves. Ideal for full sun and well-drained soil, it’s perfect for borders, cottage gardens, or containers.

Once established, this drought-tolerant, low-maintenance plant attracts pollinators like bees and hummingbirds. With its bold colour and elegant form, Penstemon ‘Garnet’ adds lasting beauty and texture to gardens, making it a must-have for any landscape.

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Origin: Hybrid of horticultural origin, species native to the Americas
Genus: Penstemon
Species / Cultivar: 'Garnet'
Common Name: Penstemon 'Garnet'
Synonym: Penstemon campanulatus 'Garnet', P. 'Andenken an Friederich Hahn', P. 'Garnet Red'

Plant Biography

Penstemon ‘Garnet’ is a hybrid variety derived from the genus Penstemon, which consists of over 250 species native to North America. This hybrid was developed to combine the vibrant flower colours and compact growth habit of its parent species, particularly those with rich red or burgundy blooms. The exact parent species of ‘Garnet’ are not fully understood as hybrids have been developed in Europe since the early 19th century and records aren’t accurate.

Like many Penstemons, ‘Garnet’ benefits from the crossbreeding of species known for their adaptability to drought and poor soil conditions. Its development focuses on improving both ornamental appeal and ease of care, making it an excellent choice for gardeners seeking a hardy, colourful addition to their landscapes. The cultivar has gained popularity for its reliable performance and striking flowers.

PGN Penstemon 'Garnet'
Soil: Well drained
Soil that does not show much signs of moisture, either visibly or when handled.
Growth Rate: Fast
Expect to see prolific growth, especially during growing season.
Water Requirement: Low
Will grow in a drier position and is unlikely to need regular watering once established.
Maintenance: Low
Minimal skill or input needed beyond the basics, a very independent plant.
Situation: Full Sun to Part Shade
Enjoys direct sun most of the day, but tolerant of fewer sunlit hours or light dappling.
Eventual Height: 0.5-1m
The plant's ultimate height in typical growing conditions.
Eventual Spread: 0.1-0.5m
The plant's ultimate spread in typical growing conditions.
Hardiness: Fully Hardy
Will survive unprotected outdoors in most areas of the UK, even in the harshest winters.
Habit: Semi Evergreen
May only remain evergreen in milder winters, or only loose leaves for a short period.
Lifecycle: Perennial
This plant is persistant and does not die off after flowering. It will return each season indefinitely, if provided with suitable growing conditions.
Care & Size Guidance

Care & Size Guidance

Penstemon ‘Garnet’ is a compact, low-maintenance perennial that thrives in well-drained soil and full sun. It grows to a height of about 45-60 cm with a spread of 30-45 cm, making it ideal for border plantings or containers. This variety requires moderate watering, but be cautious of overwatering to avoid root rot.

Pruning spent flowers encourages reblooming and maintains a tidy appearance. ‘Garnet’ is drought-tolerant once established, making it perfect for water-wise gardens. For best results, fertilise annually with a balanced fertiliser in early spring to promote vigorous growth and vibrant flowers. Divide congested clumps in spring.

1 customer review for Penstemon ‘Garnet’

Great quality plants . Full and sturdy. Also not pruned back so customer gets to choose how tall to leave them. Very well packed and quickly delivered.

Helen Seal (verified owner) –

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