Bolander's Phacelia (Phacelia bolanderi)

Bolander's Phacelia

Phacelia bolanderi

Delicate blue blooms carpet coastal slopes with soft color. Annual wildflower; common name: Bolander's Phacelia.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in coastal open habitats with mild sunlight and tolerates light salt spray
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Watering Water regularly during dry spells; avoid overwatering as it prefers well-drained, slightly dry soil conditions
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Temperature Tolerates mild coastal temperatures; avoid extreme heat above 28°C or frost below 2°C
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Characteristics

  • Leaf: Small, oblong to lanceolate leaves with slightly serrated margins, covered in fine hairs.
  • Flower: Clusters of funnel-shaped blue-purple blooms arranged in coiled cymes.
  • Stem: Slender, hairy stems that spread horizontally to form dense mats.
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Care Guide

Watering

Keep soil evenly moist during active growing season; allow top 1 cm of soil to dry between waterings

Fertilization

Light, diluted organic feed once at planting. Avoid high-nitrogen fertilizers to prevent excessive foliage growth at the expense of blooms

Eggshell powder topdress:Crush clean, dried eggshells to fine powder; sprinkle lightly on soil surface to add calcium without overfertilizing and support healthy root development
Pruning
  • Remove spent blooms to encourage extended flowering and tidy growth.
  • Trim back dead foliage after dormancy to prepare for next growing season.
  • Avoid heavy pruning as it is a low-growing mat-forming species that spreads naturally.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No documented toxicity to cats per ASPCA guidelines

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Pollinator-friendly wildflower for native coastal gardens; supports bees and butterflies