Bog sage (Salvia uliginosa)

Bog sage

Also known as: Sky-blue Sage

Bog sage is a perennial herbaceous shrub that is commonly used in gardens as an ornamental plant. It has lanceolate-shaped leaves that are covered in hair, and it produces blooms that display a stunningly bright shade of blue.

Scientific classification

Species

Bog sage (Salvia uliginosa)

Mints plantains olives and allies

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Perennial, Annual

Lifespan

Herb

Plant Type

Spring, Summer, Fall

Bloom Time

1.2 m to 1.5 m

Plant Height

1.2 m to 2.5 m

Spread

Green, Blue

Stem Color

Deciduous

Leaf type

20 - 35 ℃

Ideal Temperature

Spring, Summer

Growth Season

Rapid

Growth Rate

Images of Bog sage

Distribution of Bog sage

Distribution Map

Bog sage is a perennial plant native to South American wetlands. It has successfully established itself outside its natural range in various temperate regions. Notably, bog sage is now found as an introduced species across major islands in the Pacific Ocean. Additionally, this plant is cultivated in different parts of the world for its ornamental value.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Marshes.

Quickly Identify Bog sage

Upright perennial reaching 4-6 feet in height with slender grooved stems.

Deep sky-blue flowers with white beeline, clustered at stem tops.

1-inch lance-shaped leaves, yellow-green with slight serration and stickiness.

Fruit is a schizocarp with four chambers, each containing tiny nutlets.

Mature fruit may be brown or tan, with smooth to slightly wrinkled texture.

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Care Guide for Bog sage

Every 1-2 weeks

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Originating from marshy terrains, bog sage thrives in wetland-like environments, preferring consistent moisture and tolerating some waterlogging. Water bog sage every 1-2 weeks, adjusting frequency during active growth to support its lush foliage and flowering.

Fertilize: For optimal bog sage health, apply balanced nutrition fertilizer monthly during the growing season, focusing on high phosphorus for blooms. Follow label recommendations to avoid over-fertilization and adjust for seasons, minimizing winter applications. Watering before application prevents root burn, and newcomers should use half-strength solutions.

Pruning: Bog sage features tall spikes of blue flowers and benefits from regular pruning in early to late spring. Cut back previous stems to the base, remove dead or damaged wood, and use sterilized tools to enhance growth, promote denser foliage, and ensure vibrant blooms.

Propagation: Bog sage, native to South American wetlands, thrives in moist environments. Propagate through healthy stem cuttings, removing lower leaves and using rooting hormone. Plant in well-draining soil, maintain humidity, mist regularly, but avoid overwatering to prevent root rot.

Repotting: Bog sage requires excellent drainage when planted in pots to ensure optimal growth and prevent root rot.

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