Penstemon 'Onyx and Pearls' (Beardtongue)

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Categories: Penstemon, Perennials

Penstemon ‘Onyx and Pearls’ (Beardtongue)

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Plant information

Plant Description

Penstemon ‘Onyx and Pearls’ is a semi-evergreen perennial known for its continuous blooming of white/pink flowers from early summer to mid-autumn. To encourage additional blooming, it is advisable to deadhead once the flowering phase concludes. While hardy, this variety may require protection during the winter months.

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🌿 How to Care for Penstemon ‘Onyx and Pearls’ (Beardtongue)

How much sun do Penstemon ‘Onyx and Pearls’ (Beardtongue) need?

Penstemon ‘Onyx and Pearls’ (Beardtongue) thrives in full sun—around six hours a day. While it can tolerate light shade, you’ll get the best flowering in bright, open spots.

What type of soil is best for Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Penstemon ‘Onyx and Pearls’ (Beardtongue) prefers well-drained soil, ideally sandy or chalky. Rich or heavy soils can cause the plant to flop and reduce flower production.

How often should I water Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Water well during the first growing season to help it establish. Once settled, Penstemon ‘Onyx and Pearls’ (Beardtongue) is drought-tolerant and rarely needs extra water unless it’s extremely dry.

Do i need to feed Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Penstemon ‘Onyx and Pearls’ (Beardtongue) doesn’t require much at all. In fact, too much fertiliser—especially nitrogen—can lead to more leaves and fewer flowers. A light feed in spring is plenty, if needed.

Should I deadhead or cut back Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Yes—regularly remove faded flowers from Penstemon ‘Onyx and Pearls’ (Beardtongue) to encourage more blooms and stop self-seeding. You can cut the plant back in autumn or early spring to tidy it up and boost new growth.

When should I divide or propagate Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Divide Penstemon ‘Onyx and Pearls’ (Beardtongue) into clumps every 3 to 5 years in spring or autumn to keep them healthy and vigorous. You can also take soft cuttings in spring.

Are Penstemon ‘Onyx and Pearls’ (Beardtongue) drought-hardy?

Yes, Penstemon ‘Onyx and Pearls’ (Beardtongue)is drought handy. Once it’s established, it copes brilliantly in dry conditions, making it perfect for sunny borders and gravel gardens.

What pests or diseases affect Penstemon ‘Onyx and Pearls’ (Beardtongue)?

Penstemon ‘Onyx and Pearls’ (Beardtongue) is generally low-maintenance, but it can occasionally suffer from aphids or powdery mildew—especially in humid or overcrowded spots. Good airflow and spacing usually prevent problems.

Penstemon ‘Onyx and Pearls’ (Beardtongue)

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🌿 How to Care for Penstemon ‘Onyx and Pearls’ (Beardtongue)

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