Palespike lobelia (Lobelia spicata)

Palespike lobelia

Also known as: Spiked lobelia

Palespike lobelia (Lobelia spicata) is used to attract hummingbirds, butterflies, and bees. Most other animals won't eat lobelias, but deer will. Birds are not interested in the tiny seeds. Palespike lobelia is native to most of the U.S. and Canada.

Scientific classification

Species

Palespike lobelia (Lobelia spicata)

Asters bellflowers fanflowers and allies

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Perennial, Annual

Lifespan

Herb

Plant Type

Late spring, Summer, Fall

Bloom Time

30 cm to 61 cm

Plant Height

30 cm

Spread

Green

Leaf Color

2.5 cm

Flower Size

White, Blue, Purple

Flower Color

Summer, Fall

Growth Season

Images of Palespike lobelia

Culture

Symbolism

Malevolence

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Quickly Identify Palespike lobelia

Tubular flowers with two lips in white, scarlet, or blue hues.

Irregularly shaped blooms with 5 distinct segments.

Nearly toothless light green basal leaves in a rosette.

Densely downy stem at base, tapering to smooth texture.

Dry dehiscent capsule fruit with bi-locular structure and small seeds.

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Care Guide for Palespike lobelia

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Originating from moist meadows, palespike lobelia thrives in consistently moist environments, requiring weekly watering. It can tolerate brief dryness and benefits from natural rainfall, making it adaptable to outdoor climates, which enhances its resilience for gardeners.

Fertilize: For optimal growth, palespike lobelia requires balanced nutrition fertilizers, with high phosphorus types promoting flowering. Fertilize every 4-6 weeks during the growing season, reducing frequency in autumn and winter. Water thoroughly after fertilization to aid nutrient absorption and avoid root damage.

Pruning: Palespike lobelia features beautiful blue flower spikes and thrives with early to late spring pruning. Trimming spent blooms and damaged stems enhances growth and prevents disease by improving airflow. Use clean, sharp tools for effective cuts, aiding recovery and promoting prolific flowering.

Propagation: Palespike lobelia is propagated through surface sowing, needing light for germination. Use a well-draining, consistently moist soil mix, and provide natural light while avoiding direct sunlight. Germination takes 2-3 weeks, after which seedlings can be transplanted into spaced pots or garden beds.

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