Penstemon whippleanus | Dusky Penstemon

Description: Penstemon whippleanus, commonly known as Whipple's penstemon, is a perennial herbaceous plant native to the mountainous regions of the western United States, including the Rocky Mountains. This striking plant is known for its tall, slender stems that can reach up to 1-2 feet in height and its dark, glossy green leaves that are lance-shaped and often tinged with a hint of purple. The most captivating feature of Penstemon whippleanus is its tubular flowers, which range in color from deep purple and blue to nearly black, blooming in late spring to early summer. These flowers attract a variety of pollinators, including bees, butterflies, and hummingbirds. Penstemon whippleanus thrives in well-draining, rocky or sandy soils and prefers full sun to partial shade. It is drought-tolerant once established, making it an excellent choice for xeriscaping and rock gardens. This species is also known for its resilience to cold temperatures. For best growth, regular deadheading of spent flowers is recommended to encourage continuous blooming and to maintain a tidy appearance. Penstemon whippleanus adds a touch of wild beauty to any garden setting with its unique color and form. Zones 4-8 Germination The seed germination process for Penstemon whippleanus, commonly known as Dusky Penstemon, requires attention to detail to ensure successful growth. Seeds can benefit from a period of cold stratification to break dormancy. This can be achieved by placing the seeds in a moist medium, such as sand or vermiculite, and refrigerating them for 4-6 weeks. After stratification, the seeds should be sown on the surface of a well-draining seed starting mix, as they require light to germinate. Maintaining a temperature between 60-70°F (15-21°C) and keeping the soil consistently moist but not waterlogged is crucial. Germination typically occurs within 2-4 weeks, though it can sometimes take longer. Once the seedlings have developed several true leaves and a strong root system, they can be transplanted into individual pots and gradually acclimated to outdoor conditions. Regular watering and exposure to sunlight will support healthy growth. Penstemon whippleanus thrives in full sun to partial shade and well-draining soil, making it a resilient and attractive addition to rock gardens and xeriscapes.

Price: 10.79 USD

Location: San Francisco, California

End Time: 2024-10-26T16:14:08.000Z

Shipping Cost: 0 USD