General Culture:
Best grown in medium moisture, well-drained, sandy or clay soils in full sun. Tolerates heat and humidity.
Noteworthy Characteristics:
Wild senna is an erect, shrubby, Missouri native herbaceous perennial which typically occurs in open woods and wet meadows and grows 4-6' tall. Features axillary racemes of brownish-yellow, pea-like flowers clustered atop unbranched stems in summer. Flowers give way to pendant, pea-like seed pods (to 4" long) which turn black in fall and persist on the plants well after the plant has in the normal course died back to the ground. Feathery, compound, locust-like, dull green leaves (4-8 pairs of oval leaflets). Formerly known as and often still sold as Cassia marilandica.
Problems:
No serious insect or disease problems.
Uses:
Tall plant makes an interesting accent for borders rears, cottage, wildflower or native plant gardens.
© Missouri Botanical
Garden, 2001-2010
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