The monarch butterfly population in North America has plummeted by over 90% in just the last 20 years. One of the biggest factors in monarch decline is the increasing scarcity of its only caterpillar host plant: milkweed. Without milkweed, monarchs can’t successfully reproduce and the species declines. By planting milkweed in your own garden and throughout your community, you can help reverse the fortune of these beautiful insects.