Tall Pepperwort (Lepidium graminifolium)

Tall Pepperwort

Lepidium graminifolium

Slender, grass-like foliage carries tiny white blooms. Annual or biennial herb; common name: tall pepperwort.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates exposed, dry growing conditions
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Watering Allow soil to dry completely between waterings; drought-tolerant once established
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Temperature Hardy to mild frosts; thrives in temperate to warm seasonal climates
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Characteristics

  • Leaf: Basal leaves form a rosette, linear to lanceolate; stem leaves are smaller, sessile and clasping
  • Flower: Tiny four-petaled white blooms arranged in terminal racemes
  • Stem: Erect, branched, glabrous or sparsely hairy
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Care Guide

Watering

Water regularly during active growth; avoid waterlogging

Fertilization

Optional dilute feed once monthly. Minimal feeding required; excess nutrients may reduce flower production

Eggshell powder topdressing:Crush baked eggshells into fine powder; sprinkle a thin layer around the base, avoiding direct contact with stems to prevent rot
Pruning
  • Deadhead spent blooms to prevent unwanted self-seeding if desired
  • Trim back faded foliage in late autumn to maintain tidy growth
  • Remove damaged or diseased stems promptly to reduce pest risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxic effects on humans; young leaves are edible in small quantities

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Garden Uses & Culture

Culture: N/A

Usage: Edible young leaves used in salads or as a potherb; occasional ornamental wildflower