Range and Habitat in Illinois
Whorled Milkweed occurs throughout most of Illinois, except for a few southern counties (see Distribution Map). It is occasional to locally common. Habitats include dry areas of black soil prairies, sand prairies, gravel prairies, hill prairies, openings in rocky upland forests, sandy savannas, limestone glades, rocky bluffs along major rivers, pastures and abandoned fields, and grassy slopes along highways. Occasionally, it is found on moist gravelly banks along rivers.