Dense-flowered Loosestrife (Lysimachia congestiflora)

Dense-flowered Loosestrife

Lysimachia congestiflora

Cheerful golden blooms cluster tightly like tiny suns. Low-growing perennial groundcover.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect to partial sun; tolerates light shade, avoid intense midday summer sun to prevent leaf scorch
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Watering Keep soil evenly moist but not waterlogged; reduce watering frequency in cool winter months
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Temperature Hardy to 5°C; prefers cool to temperate temperatures, protect from hard frost to prevent foliage damage
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Characteristics

  • Leaf: Opposite, oval to lanceolate, glossy medium green with subtle reddish undersides
  • Flower: Bright yellow, star-shaped, densely clustered at stem apices
  • Stem: Trailing, creeping stems that root at nodes to form dense, spreading mats
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Care Guide

Watering

Keep soil consistently moist; mist occasionally during dry, hot spells to boost humidity

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization in late autumn and winter when growth slows

Banana peel tea:Soak chopped banana peels in water for 3 days, dilute 1:20 with water for root drench; discard solids to avoid pest infestations and odor
Pruning
  • Trim back leggy stems in early spring to encourage compact, bushier growth
  • Remove spent flower clusters promptly to prolong the blooming period
  • Thin overcrowded mats to improve air circulation and reduce fungal disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported adverse effects

Humans: No known toxicity to humans; safe for handling and accidental minor ingestion

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Garden Uses & Culture

Culture: N/A

Usage: Groundcover for rock gardens, trailing accent in hanging baskets, edging for garden borders