Rocky mountain penstemon (Penstemon strictus)

Rocky mountain penstemon

Also known as: Porch penstemon

Rocky mountain penstemon (Penstemon strictus) is a perennial that grows from 61 to 76 cm tall. It is an evergreen that is easy to grow. It produces spikes of bright blue flowers in spring. The long-lasting blooms attract hummingbirds and bees. It is rabbit resistant, and good for areas needing erosion control. Rocky mountain penstemon requires full sun and multiplies under good growing conditions.

Scientific classification

Species

Rocky mountain penstemon (Penstemon strictus)

Mints plantains olives and allies

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30 cm to 91 cm

Plant Height

90 cm

Spread

Green, Purple

Leaf Color

2.5 cm

Flower Size

Brown

Fruit Color

Purple, Blue

Flower Color

Winter dormancy

Dormancy

Evergreen, Semi-evergreen

Leaf type

5 - 35 ℃

Ideal Temperature

Spring, Summer

Growth Season

Moderate

Growth Rate

Images of Rocky mountain penstemon

Attributes of Rocky mountain penstemon

Growth Rate

Exhibiting a moderate growth rate, rocky mountain penstemon showcases pronounced development during spring and summer. Its moderate speed allows optimal leaf production, contributing to its robust stature. Phenomenal height increases are also observed, with occasional flowering. Notably, growth variation can occur between seasons, though the plant primarily thrives in the warmer months, demonstrating horticultural resilience.

Culture

Garden Use

Borders and flower beds are the perfect locations for the rocky mountain penstemon. You should grow it in sunny locations with well-drained soil in coastal or cottage gardens. The green foliage lasts all year long, and the showy blooms appear during the summer months. It also works well in wildlife gardens, as it attracts hummingbirds and bees with its nectar-filled blooms.

Symbolism

Courage and spiritual knowledge

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Care Guide for Rocky mountain penstemon

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Rocky mountain penstemon thrives in rocky terrains, requiring moderate hydration and consistent weekly watering. This plant prefers a balance of moisture without oversaturation and primarily flourishes outdoors during the growing season when natural rainfall meets its needs.

Fertilize: Rocky mountain penstemon benefits from balanced nutrition fertilizers applied in early spring and midsummer if needed. Avoid high-nitrogen feeds to promote flowering. Stop fertilization by late summer to prepare for winter, and use slow-release formulations. Water thoroughly after applying fertilizer to prevent root burn.

Pruning: The plant displays tall spikes of tubular flowers, thriving in rocky, well-drained soils. Prune rocky mountain penstemon in spring to promote growth and blooms; remove dead stems and spent flowers. Light pruning aids shape and vigor while enhancing air circulation to reduce disease risk. Sanitize tools before use.

Propagation: Rocky mountain penstemon propagates best through stem cuttings in spring and summer, though it may require some effort. Signs of success include new leaf growth and root development. Maintaining adequate moisture and using well-draining soil are crucial for optimal propagation results.

Repotting: Repot 'rocky mountain penstemon' every 2-3 years in early spring using a container slightly larger than its rootball with drainage holes. Post-repotting, keep the soil moist and avoid direct midday sun for optimal recovery, addressing its limited transplant tolerance.

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Images of Rocky mountain penstemon

Attributes of Rocky mountain penstemon

Culture

Care Guide for Rocky mountain penstemon

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