Whipple's penstemon (Penstemon whippleanus)

Whipple's penstemon

Also known as: Dusky beardtongue

Whipple's penstemon is a mat-forming plant commonly cultivated as an ornamental due to its striking burgundy blooms. It is typically planted in informal gardens and city residences, beds, and borders. Whipple's penstemon is an ideal choice for a wildlife garden as it attracts bees, butterflies, and other insects.

Scientific classification

Species

Whipple's penstemon (Penstemon whippleanus)

Mints plantains olives and allies

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Perennial

Lifespan

Herb, Shrub

Plant Type

Spring, Summer, Mid fall

Bloom Time

90 cm

Plant Height

40 cm

Spread

Green, Blue

Leaf Color

2.5 cm

Flower Size

Purple

Flower Color

Rapid

Growth Rate

Images of Whipple's penstemon

Attributes of Whipple's penstemon

Growth Rate

Exhibiting rapid growth in Spring and Summer, whipple's penstemon experiences a dramatic proliferation in leaf production, stem elongation, and blossoming. During these seasons, it can often double its size, implying considerable metabolic activity. Notably, growth pace tapers in other seasons, providing necessary rest.

Care Guide for Whipple's penstemon

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Whipple's penstemon originates from mountainous areas, thriving with moderate moisture and tolerating brief dry periods. It requires weekly watering to mimic natural rainfall, avoiding waterlogged soil and prolonged drought, ensuring healthy growth as an herbaceous perennial often cultivated outdoors.

Fertilize: Whipple's penstemon requires balanced fertilizers applied sparingly in spring, using a half-strength solution monthly during the growing season. Avoid fertilization in fall and winter. Always water after application to prevent root burn, as moderation enhances whipple's penstemon's resilience and flowering potential.

Pruning: Whipple's penstemon is a perennial with tubular purple flowers and attractive foliage. Prune in early to late spring for healthy growth, removing dead stems and cutting back bloom stalks. This enhances air circulation, reduces disease risk, and encourages vigorous growth, ensuring whipple's penstemon thrives beautifully.

Propagation: Whipple's penstemon is favored for its vibrant flowers and resilience. Propagation is done by lightly covering seeds with soil and maintaining consistent moisture without overwatering. Well-draining soil enhances growth, and using a starting mix or fine vermiculite supports seed establishment through better aeration and moisture retention.

Repotting: Whipple's penstemon requires pots with excellent drainage to thrive, preventing waterlogging which can lead to root rot. Ensuring proper drainage is crucial for the healthy growth of the plant.

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