Monarchs have been in decline for 20 years, spurring conservation efforts by scientists and everyday people, who grow milkweed in gardens, fields and parkways.

De La Mater also set up a common-garden experiment. He brought plants from his eastern U.S. milkweed tour to the university greenhouse, growing them in identical conditions of soil, light, water and ...

The study of 450 local milkweed patches found that several strategies were associated with finding more monarch eggs: planting common milkweed, having milkweed that’s at least 5 years old ...

The common milkweed, with dull pink flowers crowded together in a somewhat rounded head, is the most familiar species. It grows in a variety of open habitats, not too wet nor too dry, including ...

Milkweed is a perennial herb found in old fields and small clearings, and on roadsides, stream sides and fencerows. Milkweed shoots (which resemble asparagus stalks and are also edible) rise out ...

Kells, 79, a retired teacher, continued monitoring her milkweed after the Field Museum study ended. ... geranium, purple coneflower, common milkweed, phlox and daylily.