Signet Marigold (Tagetes tenuifolia)

Signet Marigold

Tagetes tenuifolia

Dainty, citrus-scented blooms carpet the foliage like golden confetti. Compact annual flowering herb; common name: Lemon Gem Marigold.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun exposure is ideal for abundant blooming; tolerates partial shade but will produce fewer flowers
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Watering Water deeply when the top 2 cm of soil feels dry; avoid overwatering to prevent root rot
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Temperature Thrives in warm temperatures; protect from frost as it is frost-tender and will die back in cold conditions
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Characteristics

  • Leaf: Fine, fern-like, bright green aromatic leaves that release a citrus scent when crushed
  • Flower: Small daisy-like blooms in yellow, orange, or white; single or double petal forms
  • Stem: Slender, branching, softly hairy stems that spread to form dense clumps
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent excessive leaf growth at the expense of blooms

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water for 24 hours, dilute 1:20 with water for root drenching to support bloom production
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering throughout the growing season
  • Pinch back young stem tips to promote bushier, denser growth
  • Remove yellowing or damaged foliage to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA non-toxic; no adverse effects reported from ingestion or contact

Humans: No toxicity reported; may cause mild skin irritation in highly sensitive individuals with prolonged contact

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Garden Uses & Culture

Culture: Symbolizes warmth, positivity, and pest resistance in home garden design

Usage: Ornamental edging; edible petals for salad garnishes or herbal tea infusions; natural pest repellent for vegetable gardens