Fall and spring are great times to plant milkweed, and even though this plant has an arguably undeserved bad rap amongst pet owners, there are ways you can incorporate it into your garden safely. Any seemingly inhospitable nook, including side yards, alleyways, or patios, can be home to milkweed—even if it’s surrounded by hardscapes like cement slabs. And your neighborhood’s furry residents shouldn’t worry if there are no walls or fencing around the area. Even though milkweed can be toxic to wildlife due to the cardenolide-rich sap it uses as a defense mechanism, it’s only dangerous in large quantities, and bugs that feed on it and become toxic themselves (like the monarchs and their offspring) have bright coloration that warns predators away, van Rees explains. Animals don’t usually eat milkweed unless they’re forced to—like when they’re corraled and have no other food available. Still, if you are neighbors to a lot of pets and wildlife in general, opt for variations such as Joe Pye weed, and stay away from the most toxic kind known as Utah milkweed. “If you have more waterlogged soils, look for moisture-tolerant species like the swamp milkweed,” he says. These plants “don’t mind wet feet.” To plant milkweed between cement slabs, consider the amount of rain your geographic area typically gets in a year. Most milkweed species prefer sandy and well-drained soil says van Rees, and ground surrounded by concrete may not drain as easily. Next, think about the amount of sunlight your plant would receive. Most milkweed species evolved in open meadows, so they adapted to thrive in full sunlight. Only a few species of milkweed like partial shade, like the purple milkweed (native to Eastern, Southern, and Midwestern United States) or the whorled milkweed (native to eastern North America). Regardless of the variety, plant your milkweed seeds under 1/4 of an inch of soil and half an inch apart. Finally, water the area frequently until the plants begin to sprout to ensure they take root. Some species, like common milkweed, can self-propagate through underground rhizomes, which allows them to spread aggressively even without the help of pollinators. Keeping the plant in a flowerpot can protect your pets’ eyes by preventing milkweed from spreading unchecked to spots your fur babies regularly hang out at. Most milkweed species have a milky white sap that can irritate eyes, Lenhart explains. “But milkweed getting in your dog’s eyes is rare,” and wouldn’t impact your animal’s health seriously, he says. “Cats might pose a challenge,” he laughs. To plant milkweed, choose a plastic container. While other materials work just as well, plastic is lighter, which will allow you to move the plant easily indoors for winter storage. Size is also important. Prefer spacious and deep containers around 10- to 12-inches tall and 5-inches wide, as milkweed root systems tend to grow large. You should also make sure your pot has a drainage hole to prevent the plant from becoming waterlogged. “Wild animals learn after one bite that milkweed isn’t good to eat,” says Ellen Jacquart, botanist and president of the Indiana Native Plant Society. “Most pets would react the same—that milky sap tastes awful!” Plant your milkweed seeds by poking shallow holes in the pot’s soil with your finger and adding the seeds. Continue to water the plant until it sprouts. Still, you should prevent any accidental ingestion of milkweed by fencing off the area. To do this, make sure the fence or protection you install is tall enough to keep pets out. A 24-inch barrier will generally dissuade most dogs from leaping into a patch of milkweed. “Native plants offer exponentially more value than plants that are not native,” says Lenhart. This is because native species co-evolved with local animals, learning with time to be best pals with them as they both changed, he explains. Variety is also a plus, as grouping different kinds of milkweed together seem to attract more pollinators, Jacquart explains. As long as all the species you choose are native to your area, you can plant as many as you want. “It’s important to realize that there are many species of milkweed. All can serve as host plants [for monarch butterflies],” Jacquart says. Start your planting now and by Spring you’ll hopefully enjoy a garden filled with beautiful butterflies and other helpful pollinators. You won’t only be getting a pretty landscape, but you’ll also be helping nature thrive.
