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Penstemon hartwegii 'Dark Towers' (1 Gallon) is a striking perennial known for its tall, upright habit and dark, spiky flowers. This plant adds dramatic vertical interest to garden beds and borders, particularly with its rich, dark color that contrasts beautifully with green foliage.
Description:
- Dimensions: Grows to a height of 24-30 inches with a spread of 18-24 inches. The plant forms a tall, erect clump of foliage with spikes of flowers emerging from the top.
- Sun Exposure: Thrives in full sun, requiring at least 6 hours of direct sunlight daily for optimal flowering and growth.
- Water Requirements: Prefers well-drained soil and is drought-tolerant once established. Water regularly during the first growing season to help establish roots, then reduce watering as needed. Avoid waterlogged conditions.
- Hardiness Zones: Hardy in Zones 5-9, suitable for a variety of temperate climates.
- Bloom Time: Blooms from late spring to early summer, producing tall spikes of tubular, dark purple flowers. The blooming period can extend into mid-summer, depending on climate and care.
- Pruning: Deadhead spent flowers to encourage a longer bloom period. Cut back the plant to the ground in late fall or early spring before new growth emerges.
How to Plant:
- Location: Ideal for garden beds, borders, or mixed perennial gardens in sunny locations. It also works well as a focal point or accent plant.
- Soil Preparation: Prefers well-drained soil, preferably slightly sandy or loamy. Amend soil with compost if needed to improve fertility and drainage.
- Planting: Dig a hole twice as wide as the root ball and the same depth. Place the plant in the hole, making sure the top of the root ball is level with the soil surface.
- Spacing: Space plants 18-24 inches apart to allow for their mature spread and to avoid overcrowding.
- Watering: Water thoroughly after planting and maintain consistent moisture during the first growing season. Once established, reduce watering frequency and allow the soil to dry out between waterings.
Fun Fact: Penstemon hartwegii 'Dark Towers' is often praised for its unique flower color and long-lasting blooms. The plant's dark purple flowers stand out in the garden and are particularly attractive to hummingbirds and butterflies. Additionally, this Penstemon variety is known for its resistance to deer and rabbits, making it a resilient choice for gardens with wildlife.