You can help save monarchs by planting milkweed in your area. Plant milkweed at home, or construct “seed bombs” with pollinator-friendly seeds and plant them (with permission) in your area.
You can find milkweed seeds through the Xerces Society Milkweed Seed Finder. Below are some instructions.
Video instructions on how to make seed bombs from the article Bombs for Butterflies on the daily online NRDC OnEarth publication.