Not all milkweed is equal for egg-laying monarchs, U of G study reveals

(University of Guelph) Milkweed plants in agricultural areas have 3 1/2 times more monarch butterfly eggs than milkweed growing in urban gardens, natural areas and roadsides, according to a new University of Guelph study. The researchers also found monarchs prefer small patches of the plant to larger ones. These findings have implications for current initiatives underway that involve planting milkweed to help the survival of this endangered butterfly.