Scientific: Tagetes signata (Synonym: Tagetes tenuifolia)
Common: Signet marigold
Family: Asteraceae
Origin: Mexico to Guatemala
Pronounciation: Ta-GE-tes sig-NA-ta
Hardiness zones
Sunset All zones as annual
USDA All zones as annual
Landscape Use: Floral accent, bedding plant, herb, sensory, or mixed flower gardens.
Form & Character: This is an easy-to-grow garden plant that is upright and open, lacy, delicate, fragrant, subtropical.
Growth Habit: Evergreen, herbaceous perennial, moderate upright growth to 12-inches tall.
Foliage/Texture: Glossy, green foliage, nearly pinntified, highly aromatic, lemon; fine texture.
Flowers & Fruits: Small, terminal, yellow or orange single daisy flowers, fruits inconspicuous.
Seasonal Color: Flowers during spring and fall.
Temperature: Tolerant of desert heat, though one MUST avoid planting this aromatic shrub in western or reflected exposures. Frost sensitive, damaged by freezes below 30oF.
Light: Full sun in mesic landscapes (with much surrounding greenry), otherwise partial shade from western sun.
Soil: Like many marigold species a well-drained, organic amended soil is needed for best performance in Phoenix.
Watering: Water nearly daily during hottest times of summer tapering to every 5 to 7 days during winter.
Pruning: Like other marigold species, lightly shear very infrequently to promote a tight habit.
Propagation: Seed, easy to germinate. For established plants, allow seed heads to dry on senescing plant, then shake dead plants to release seeds onto ground for future germination in a garden site.
Disease and Pests: None
Additional comments: The cultivar 'Lemon Gem' is uniform showing masses of single, lemon-yellow, small, single blooms that are positioned slightly above the plant's lacy foliage. The cultivar 'Tangerine Gem' has lovely orange flowers.