Tall blue lettuce (Lactuca biennis)

Tall blue lettuce

Also known as: Woodland lettuce

Tall blue lettuce (Lactuca biennis) is a species of wild lettuce. It is technically related to what we think of as lettuce, but that does not mean tall blue lettuce is edible. It grows across the United States and Canada, including in Alaska. It is a common weed that likes to grow on disturbed lands at the edges of human habitation.

Scientific classification

Species

Tall blue lettuce (Lactuca biennis)

Asters bellflowers fanflowers and allies

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Biennial, Annual

Lifespan

Herb

Plant Type

Summer, Fall

Bloom Time

Late summer, Early fall, Mid fall

Harvest Time

61 cm to 2 m

Plant Height

60 cm

Spread

Green, Blue

Leaf Color

2.5 cm

Flower Size

Brown

Fruit Color

20 - 35 ℃

Ideal Temperature

Images of Tall blue lettuce

Culture

Symbolism

Cold-hearted or saddness. Do You Still Love Me?

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Care Guide for Tall blue lettuce

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Tall blue lettuce thrives in environments with periodic rainfall, preferring consistent moisture without waterlogging. It requires weekly watering for vigor and benefits from well-draining soil to mimic its natural habitat. This herbaceous species exhibits moderate drought tolerance and prevents root rot.

Fertilize: For optimal growth of tall blue lettuce, use balanced fertilizers during its growing season, applying every 4-6 weeks. High nitrogen boosts leaf production, but reduce frequency as tall blue lettuce nears dormancy. Avoid over-fertilization and consider a soil test for specific nutrient needs. Ensure safety by wearing gloves.

Pruning: Tall blue lettuce features tall, blue-green leaves and thrives with spring pruning. Remove damaged foliage and thin crowded areas for better air circulation and light. This practice reduces disease risk, promoting vigorous growth and flowering. Use clean, sharp tools for effective pruning.

Propagation: Tall blue lettuce is easy to propagate through sowing. Scatter seeds on fertile, well-drained soil, lightly covering them. Keep soil moist but not waterlogged for optimal germination. Thin seedlings to provide space for growth; they are resilient and adapt well to their environments.

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Images of Tall blue lettuce

Culture

Care Guide for Tall blue lettuce

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