This plant has become naturalized in QC. (Nature Serve)
It is most often found in overgrazed pastures; it does not compete well in vigorous stands of native grasses.
Habitat Information: Sunny areas with dry to moderate soils, with preference for sand and loam, disturbed landscapes, prairies, inland sandy areas (Robert R. Freckman Herbarium, University of Wisconsin)
Garden Uses: Hoary vervain is a great accompaniment in gardens to its cousin blue vervain, as they are both quite similar, their colours and leaves area lend texture and subtle variations in texture and form. Hoary vervain is named because of its hairy leaves that are an adaptation to conserving moisture in its natural habitat. It is a slightly smaller plant. The two have very different habitats, its cousin blue vervain perferring wet areas. It seeds itself very well even in cracks of pavement, but because of its slightly smaller stature, it can be taken over by larger plants in gardens. (Evergreen)
Insect Relationships: The following study by Michigan State University detailed insects that were attracted to specific native plant species. The following insects were shown to be attracted to this plant ""Natural Enemies Attracted: Medium numbers of Orius insidiousus and Chalcidoidea. Small numbers of Empididae, Thomisidae, Plagiognathus politus, Chrysopidae and Nabidae. Pests Attracted: Medium numbers of lygus bug and cabbbage white butterflies. Bees attracted: Low numbers (less than 1 bee per meter square in a 30 second sample) of bees including digger bees, small carpenter bees, and bumble bees."" (Michigan State University)
Traditional Edible, Medicinal Uses: Tea can be made of leaves, and is thought effective for fever and ague. Leaf infusion used for stomach aches. (Plants for a Future)
Green Roof: This drought hardy plant has been grown in soil levels 5 inches and up with good results. (Evergreen)
Small mammals eat the seeds. (Wildflower Centre, LBJ)
It is a hairy plant, thus the adjective 'woolly'.
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