Rock Penstemon

Rock Penstemon, scientifically known as Penstemon baccharifolius, is a vibrant perennial native to Texas and northern Mexico. It is particularly valued for its striking red or orange-red tubular flowers that bloom prolifically from late spring through summer, attracting hummingbirds, bees, and butterflies to the garden. This species is part of the large Penstemon genus, which is known for its diverse and colorful flowers, making it a favorite among gardeners looking to add bright splashes of color to their landscapes.

Growing to about 1 to 3 feet tall and spreading 1 to 2 feet wide, Rock Penstemon forms a bushy, upright clump of lance-shaped, green leaves. The plant is well-suited for rock gardens, borders, and wildflower meadows, where its drought tolerance and low maintenance requirements make it a valuable addition.

Adapted to full sun, Rock Penstemon thrives in well-draining soil and is particularly drought-tolerant once established, making it an excellent choice for xeriscaping and water-wise gardening. It can tolerate a range of soil types, including sandy and rocky soils, as long as they are well-drained.

In landscaping, Rock Penstemon is often used for its ornamental appeal and ability to attract pollinators. It can serve as an attractive addition to mixed borders, provide vibrant color in rock gardens, or be used in mass plantings for a dramatic effect. Its resistance to deer and other pests further enhances its value in the garden.

Overall, Rock Penstemon is a low-maintenance, drought-tolerant perennial that adds beauty, color, and ecological benefits to sunny garden areas. Its adaptability to various growing conditions and long blooming season make it a popular choice for gardeners seeking to create visually engaging and sustainable landscapes.

Three Timbers Installation Guide (Feel Free to Follow): Rock Penstemon

Planting Guide:

• Location: Full sun (at least 6 hours of direct sunlight for optimal growth and vibrant blooms)
• Soil: Well-drained, sandy or loamy soil (slightly acidic to neutral soil preferred)
• Spacing: Space plants 12-18 inches apart for compact growth and air circulation
• Planting Depth: Plant at the same depth as the root ball, ensuring the top of the root ball is level with the surrounding soil surface
• Support: Rock Penstemon is a low-maintenance perennial that requires no staking and grows in a clumping form with colorful tubular flowers

Watering Guide:

Watering After Planting:

• Initial Watering: Water thoroughly immediately after planting to saturate the root ball and surrounding soil
• Frequency: Water every 3-4 days for the first 2-3 weeks to help establish the root system
• Watering Amount: Provide 1 inch of water per session for deep watering

When is the Plant Established?

• Timeframe: Rock Penstemon is considered established after 2-3 months when the roots have spread into the surrounding soil

Watering Once Established:

• Summer: Water every 7-10 days during the hotter months. If temperatures exceed 100°F, increase watering to every 5-7 days. Provide 1.5-2 inches of water per session.
• Winter: Water every 3-4 weeks during the cooler months, depending on rainfall.

Drip Irrigation Setup:

• Placement of Emitters: Place the drip emitters 6-12 inches away from the base of the plant for even watering
• Flow Rate: Use emitters with a flow rate of 1-2 gallons per hour
• Number of Emitters: 1 emitter per plant for even watering distribution
• Adjusting Frequency: In summer, increase watering frequency to every 5-7 days. In winter, reduce to every 3-4 weeks