Plant Profile: Tagetes erecta

Tagetes erecta, commonly known as the African marigold, is a popular choice for cultivation as a tender herbaceous annual or houseplant. Taller varieties may require support, and it is advisable to promptly remove spent flowers, as their weight can lead to stem breakage. While this plant can thrive in clay and dry soils, it prefers a moist, well-drained environment. It can endure full sunlight but benefits from some light shade during the afternoon. The leaves and flowers emit a pleasant fragrance when touched or crushed. To encourage a bushier growth habit, pinch back young plants.

Triploid F1 hybrids, resulting from the cross between T. erecta and T. patula, merge the large blooms of the African marigold with the compact stature of the French marigold. These robust plants produce flowers measuring 2-3 inches in diameter on stems that reach heights of 10-18 inches. Notably, these triploids are resilient to the intense heat of summer and typically continue to bloom throughout the season.

In terms of pests and diseases, this plant is prone to issues such as powdery mildew, Botrytis, leaf spot, and various rots. Keep an eye out for spider mites and thrips, which can also pose threats.