It’s important for us to keep monarchs on the landscape as pollinators to maintain biodiversity. Fortunately, there’s something we can do about it, and the solution begins in your garden. Just as summer’s ample supply of flowers begins to wane, the butterflies start their southern migration. To ensure they get the food they need, monarchs follow the blooming of late summer’s composites, such as goldenrod and aster. Often found along roadside ditches, lawn edges, and old fields, these plants are important nectar sources but are often mowed down or sprayed with herbicide, leaving little for autumn pollinators. To help a hungry monarch, make space in your garden for goldenrod and aster. New England aster comes in every shade of pink and purple imaginable and does well tucked in the back border of a yard, where it can grow to its full imposing height of five feet.
Related: Never Plant Butterfly Bush Again
In fall, it will be crowned with a blaze of brilliantly colored blooms—and monarchs will take notice. Goldenrods are native throughout North America, so take your pick of large or small, compact or leggy, dry land or wetland species. Each one sports a bright spire of yellow flowers in late summer and early fall, and each flower is a terrific producer of the sweet stuff all monarchs need. If your garden is too small for extra plants, put aside a patch of lawn and let it revert back to native meadow. Nectar-rich wildflowers like aster and goldenrod will naturally reclaim these untended spaces. Even if it’s just a little strip a few feet wide, it can and will make a difference for monarchs and all other pollinators. Other good native plant nectar sources include mountain mint, ironweed, and blazing star.
If you garden farther south or in the Midwest, make planting milkweeds part of your autumn to-do list. They’re transcontinental, abundant, and easy to grow. Gather the seeds as they burst in the fall (they come in pointy seed cases, which erupt to reveal tear drop shaped seeds, each equipped with its own fluffy parachute, like a dandelion) and scatter them everywhere. Swamp milkweed is an excellent, showy choice for wet areas in the eastern U.S., while butterfly weed is a brilliant, showy orange, and will colonize tough, dry sites. For butterfly enthusiasts in the western states, try antelope horns, a species of milkweed with extraordinary green and purple flowers. If you can’t find a local population of milkweed, the seeds can be sourced online.
Related: Keys To A High-Yield Garden
As with any kind of wildlife gardening, diversity is the goal. Plant flowers for all seasons, beginning in early spring (particularly for gardens in the south) and extending all the way to late fall. Lump flowers en masse, so their blooms will be visible from a great distance, and leave wet open spaces for mineral licks, where butterflies can gather and suck up essential nutrients from the soil. Cultivate clusters of important host plants and eventually, with a little luck and persistence, we will save these important pollinators for many years to come.
Monarch Nectar Sources + Host Plants For The Eastern U.S.
New England aster
New Jersey tea
Monarch Nectar Sources + Host Plants For The Western U.S.