A lovely monarch stocks up on nectar before its migration at this Buddleja davidii

Milkweed is the only host plant for monarch caterpillars, meaning a monarch will not lay its eggs on any other plant, and the caterpillars will eat nothing else. These plants are being killed all over the US as more Round-up Ready corn is planted and houses, commercial centers and roads are put in. It's up to us as gardeners and homeowners and small farmers to keep these plants growing for monarchs.