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Dark Towers Penstemon
Penstemon ‘Dark Towers’
Dark Towers Penstemon is a great choice when you want a perennial that earns its place before and after bloom. The dark burgundy foliage provides the border with real contrast, and the pink flowers attract hummingbirds without overpowering the planting. Give it full sun, good drainage, and a light hand with fertilizer, and it will add color and structure with very little fuss.
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Dark Burgundy Foliage Penstemon with Pink Flowers for Sunny Borders and Pollinator
Dark Towers Penstemon Adds Foliage Color Before It Blooms
Dark Towers Penstemon is a striking perennial beardtongue grown for its deep wine-red to burgundy foliage and upright pink flower spikes. Also known as Penstemon ‘Dark Towers’ or Dark Towers Beardtongue, this plant gives homeowners more than a short flower display because the dark foliage adds color and contrast from spring through the growing season.
The foliage is the standout feature. Dark Towers has a deeper, more dramatic look than many older red-leaf Penstemon varieties, making it useful in sunny borders where foliage contrast matters. It pairs beautifully with silver, gold, blue, white, pink, and chartreuse companions.
Pink Tubular Flowers Bring Hummingbirds and Pollinators
In late spring to early summer, Dark Towers Penstemon sends up upright stems topped with pale pink to lavender-pink tubular flowers. The flowers rise above the dark foliage, creating a clean two-tone effect that looks fresh in cottage gardens, pollinator beds, native-style borders, and sunny perennial plantings.
The tubular blooms are especially attractive to hummingbirds, and bees and butterflies may also visit. Plant several together for a stronger pollinator display, or repeat Dark Towers through a mixed border to echo the dark foliage color while adding seasonal flower movement.
A Tall Beardtongue with Strong Garden Structure
Dark Towers Penstemon commonly grows about 2 to 3 feet tall in bloom and 1 to 2 feet wide, though mature size can vary by growing conditions. The upright stems give it good vertical presence without becoming as massive as many back-of-border perennials.
Use Dark Towers in the middle of sunny borders, along walkways, in cottage gardens, in pollinator plantings, or as a dark foliage accent near lighter-colored perennials. It works especially well with Salvia, Catmint, Coreopsis, Yarrow, Echinacea, Rudbeckia, Lavender, ornamental grasses, and Sedum.
Full Sun, Good Drainage, and Easy Penstemon Care
Plant Dark Towers Penstemon in full sun for the richest foliage color, strongest stems, and best flowering. It can tolerate light shade, but too much shade may make the foliage appear greener and reduce bloom.
Well-drained soil is important. Penstemon does not like wet, poorly drained soil, especially in winter. Once established, Dark Towers is drought-tolerant and handles summer heat well, but it performs best when watered during long dry spells. Avoid overly rich soil or heavy fertilizer, which can encourage soft growth.
Deer Resistant, Heat Tolerant, and Built for Low-Maintenance Color
Dark Towers Penstemon is generally considered deer resistant, making it a practical choice for sunny gardens where browsing can be a concern. It is also known for good heat and humidity tolerance, which helps it perform better in many eastern and Mid-Atlantic gardens than some drier-climate Penstemon selections.
Maintenance is simple. Remove spent flower stems after bloom for a tidier look, or leave some seed heads for added texture. In late winter or early spring, remove old stems and tired foliage before new growth begins. In colder gardens, avoid cutting the plant back too hard or too early in fall.
| Hardiness Zone: | 3-8 |
|---|---|
| Mature Height: | 30 to 36 Inches |
| Mature Width: | 12 to 24 Inches |
| Sunlight: | Full sun preferred; tolerates light shade |
| Soil | Average, dry to medium, well-drained soil |
| Water | Water regularly after planting; drought tolerant once established |
| Bloom Time / Color: | Late spring to early summer; pale pink to lavender-pink tubular flowers |
| Ornamental Features | Dark foliage, upright flower spikes, pink tubular blooms, vertical structure, foliage contrast |
| Wildlife Value | Attracts hummingbirds, butterflies, bees, and beneficial pollinators |
| Resistance | Generally considered deer resistant; drought tolerant once established; heat and humidity tolerant |
| Landscape Uses | Sunny borders, pollinator gardens, hummingbird gardens, cottage gardens, native-style plantings, dark foliage accents, mass plantings |
How to Care for Dark Towers Penstemon
Be sure to read our planting instructions to ensure a healthy and happy Dark Towers Penstemon plant for years to come!
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How should I plant Dark Towers Penstemon?
Plant Dark Towers Penstemon in full sun with average, well-drained soil. Dig a hole about twice as wide as the root ball and just as deep as the container. Set the crown level with the surrounding soil, backfill with loosened native soil, and water thoroughly after planting. Space plants about 18 to 24 inches apart so each clump has room for airflow and mature growth. Choose a site with good drainage, especially in winter. If your soil is heavy clay, improve drainage before planting or use a raised bed, berm, or sloped planting area.
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How often should I water Dark Towers Penstemon after planting?
Water Dark Towers Penstemon deeply after planting, then keep the soil lightly moist while the roots establish. During the first growing season, water when the top few inches of soil become dry, especially during hot, windy weather. Once established, Dark Towers is drought tolerant and usually needs less water than many flowering perennials. It performs best when the soil dries slightly between waterings. Avoid soggy soil or frequent shallow watering, especially in cool weather.
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When should I fertilize Dark Towers Penstemon?
Fertilize Dark Towers Penstemon lightly in early spring if needed. A thin layer of compost or a modest application of slow-release balanced fertilizer is usually enough to support healthy growth and flowering. Avoid heavy feeding. Too much fertilizer can encourage soft leafy growth and reduce the sturdy habit that makes this plant useful in sunny borders. In average garden soil, full sun and good drainage are more important than frequent fertilizer.
When and how should I prune / cut back Dark Towers Penstemon?
After bloom, remove spent flower stems if you want a cleaner look or to encourage a tidier plant. Cut the flower stalks back to the basal foliage or to a lower set of healthy leaves. In late winter or early spring, remove old stems and tired foliage before new growth begins. In colder climates, avoid cutting back too aggressively in fall, because some remaining basal growth can help protect the crown through winter.
