Tagetes tenuifolia g122.JPG. by Goku122. CC BY-SA 3.0. via Wikimedia Commons
CC BY-SA 3.0 · Wikimedia Commons
Signet Marigold Plant Care
Tagetes tenuifolia Kunth
Tagetes tenuifolia, the signet marigold,[2] golden marigold or lemon marigold,[3] is a species of the wild marigold in the family Asteraceae. It is widespread across most of Mexico as well as Central America, Colombia, and Peru.[4][5][6][7][8]
Every 4–7 days
Full sun
60–80°F
40–60%
What Is the Signet Marigold?
Signet Marigold (Tagetes tenuifolia) belongs to the Asteraceae family within the Tagetes genus. Signet Marigold is also known as Lemon marigold, Mint marigold, Tagetes jaliscensis.
Signet Marigold displays a bushy annual growth habit, reaching up to 1.5 inches tall with a spread of approximately 1 inches. Signet Marigold produces bright, daisy-like flowers in various colors.
Leaf size: approximately 2 inches.
How Often Should You Water a Signet Marigold?
Tagetes tenuifolia requires watering every 4–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 4–7 days
Let soil partially dry between waterings
What Light Does the Signet Marigold Need?
Signet Marigold thrives in full sun light conditions. The optimal light range is 500–1000 lux. Avoid placing Signet Marigold in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun
500–1000 lux
What Temperature and Humidity Does the Signet Marigold Prefer?
Tagetes tenuifolia grows best at temperatures between 60°F and 80°F. Signet Marigold prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Signet Marigold?
Well-draining, fertile soil with added compost. Good drainage is essential for Signet Marigold to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Signet Marigold?
Annual repotting in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Signet Marigold?
Signet Marigold can be propagated through seeds. Similar propagation techniques also apply to marigold plant care, which shares the same genus.
Fertilizing
Every 3 months
During the growing season
Is the Signet Marigold Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the Signet Marigold?
Signet Marigold is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Signet Marigold Need?
Signet Marigold grows outdoors in USDA Zone 13a. In cooler regions, grow Signet Marigold as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Signet Marigold is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Tagetes genus — compare its care with other Tagetes species on PlantoScan.
Signet Marigold thrives in bright light and direct sun — see other bright-light plants.
More Tagetes Species
Other Tagetes species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
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