KnapweedKnapweed is an introduced plant in Indiana. It grows wild on roadsides, fields, pastures, around railroad tracks, and pretty much anywhere else it can get a foothold. Once established, the knapweed plant secretes a toxin that inhibits the growth of nearby plants, allowing it’s own seeds to take hold and spread. Knapweed nectar produces a light and desirable honey, and your bees may be one of the few creatures to benefit if you have heavy concentrations of this plant in your area.