Scientific Name: Cardamine hirsuta
Hairy bittercress is a winter or summer annual depending on its location. It initially forms a basal rosette. The initial true leaves are heart shaped, followed by leaves which contain 2 - 4 alternating leaflets. The surface of the leaves is often hairy. Hairy bittercress forms stems that are smooth and erect, usually branched at the base with few leaves. Hairy bittercress spreads by seed. The seed capsule is up to 10 times longer than it is wide. The capsules will project the seeds when disturbed. Hairy bittercress can have multiple generations per year. Hairy bittercress is found from Maine to Florida, west to Nebraska and Texas.
Hairy bittercress is an annual weed which is found on wet disturbed areas. It does best on sandy to organic soils. It can be found in landscapes, turf and in container plants. Allow soils to dry or correct drainage to prevent soils from remaining moist.
Make your post-emergent herbicide application when hairy bittercress is young and actively growing. For best results, treat during rosette stage.
Weed Photos: Courtesy of Dr. Lambert McCartey. Clemson University. Clemson, SC.