Prepare peat or other biodegradable pots before removing the butterfly weed seeds from the refrigerator. Fill 3-inch starter pots with a mixture of half seed-starting compost and half coarse sand. Moisten the mix and press it firm.
Water the butterfly weed seeds whenever the compost feels barely damp when pressed. Apply the water by the spoonful or use a spray bottle to keep from dislodging the seeds.
Watch for germination in two to three weeks. Turn off the propagation mat one week after the seeds sprout. Move the pots into a cold frame outdoors or against a south-facing wall with noonday shade.
Make a 1/4-inch-deep planting hole in the center of compost mixture. Drop one butterfly weed seed in the planting hole. Cover it with a loose layer of compost. Mist the compost to settle it.
Place the butterfly weed seeds in a plastic bag filled with 1 cup of moistened perlite. Store the bag inside the refrigerator for three months. Mist the perlite with water every few days to keep it from drying out completely.
Leave the bucket outdoors for two or three days to let the fluff blow away. Stir the seeds occasionally to loosen more fluff. Do not worry if some of the fluff remains, since it won’t inhibit the germination process.
Sometimes called pleurisy root, butterfly weed (Asclepias tuberosa) is a perennial wildflower grown for its showy, reddish-orange flower clusters and textured, lanceolate leaves. A member of the milkweed family, it thrives throughout U.S. Department of Agriculture plant hardiness zones 3 to 9, where it is frequently added to butterfly gardens and native plant landscaping.
Typically, the easiest and most successful way to add Butterfly Weed to your garden is to grow it from seed form. Plant fresh seeds in fall for growth the following spring, or allow any established Butterfly Weeds already in your garden to do the work for you. Beginning in late summer or early fall, the plants should start to develop seed pods in place of their blooms. If left on the stem, the pods will eventually burst and the seeds inside will be blown throughout your garden, allowing them to establish themselves in the soil in time for the following year. If you’d rather have more control over the eventual location of any new Butterfly Weed plants, you can remove the seed pods from the plant before they burst open and simply plant new seeds by hand instead.
Chances are there are more finicky flowers in your garden than the Butterfly Weed, so feel free to allow them to dictate the soil composition—when it comes to this plant, you don’t have to stress. Butterfly Weed can prosper in a variety of soil conditions and compositions, from clay to gravel, and generally prefers a neutral to slightly acidic pH.
Butterfly weed is a must-have plant for green thumbs looking to coax its namesake beautiful winged insects into their garden. Also known as Asclepias tuberosa, orange milkweed, pleurisy root, and yellow milkweed, the plant can grow to be anywhere from one to two feet tall and is characterized by glossy green leaves and clusters of bright orange-to-yellow blooms that are rich with nectar and pollen, which in turn attracts butterflies, along with bees, insects, and hummingbirds, all summer long. First grown in the prairies of the Midwestern United States, Butterfly Weed boasts a long medicinal history as well—Native Americans used to chew the roots as a remedy for pleurisy and other pulmonary issues, and they can also be brewed into a tea that can then be used to treat diarrhea and other stomach ailments. Butterfly weed should be planted in the early spring (after the final frost)—it will be slow to emerge, but will grow quickly once it does, hitting peak height and bloom in mid-to-late summer.
How to Grow Butterfly Weed From Seed
Beloved for its ability to attract a variety of helpful (and beautiful) insects to the garden, Butterly Weed is an easy-to-nurture varietal that can also be found growing as a native wildflower in a slew of untamed environments, like meadows, prairies, and forests. Typically grown from seeds you sow directly in the garden in the fall, the butterfly plant does not require much tending to in order to thrive, prospering well in everything from clay soil, to dry or rocky soil, and even throughout drought-like conditions. Its seed pods will brown towards the end of its growing season (early autumn) and, if left on the plant, will burst and spread seeds throughout your garden to emerge as new growth the following spring. While the plant can take up to three years to fully mature and produce flowers, its blooms will gradually grow denser with each season that passes.
Though considered non-toxic, the roots and sap from Butterfly Weed can cause vomiting, weakness, and spasms in both animals and humans if consumed in very large quantities.
Because the Butterfly Weed is adaptable to zones three through nine, it can thrive in a variety of different temperature and humidity settings. Generally, the plant emerges in late spring, hitting its peak bloom during the warmer summer months and drying on the stem throughout the autumn and winter. It also tolerates heat and drought well.
Choose a spot in your garden to plant your Butterfly Weed that boasts hours of bright sunlight daily, as this plant loves to soak up the rays. Full-sun is definitely your best bet, but the hardy plant can tolerate a few hours of shade too.