This means it takes much longer for the caterpillar to grow. Is butterfly weed poisonous to humans, dogs, or cats? Butterfly weed is native to the prairies of the Midwestern United States. What is a butterfly weed? In the garden, butterfly weed looks great in Growing butterfly weed requires very little effort. The monarch’s top 4 favorite milkweed species are bolded in the list below.. However, when given a choice, their favorite milkweed by far, is the Asclepias incarnata, common name: Swamp milkweed. The winner is the Asclepias incarnata, common name: Swamp milkweed Butterfly weed plants (Asclepias tuberosa) are trouble-free North American natives that produce umbels of bright orange, yellow or red blooms all summer long.Butterfly weed is appropriately named, as the nectar- and pollen-rich flowers attract hummingbirds and hordes of butterflies, bees and other beneficial insects throughout the blooming season. A. tuberosa (butterfly weed) has very low moisture levels, which does not allow the uptake of nitrogen. It is a big magnet for other butterflies as a nectar source. Milkweeds in the genusAsclepias are one of the joys of summer.One of the most beautiful and easily recognizable species is the orange milkweed or butterfly-weed (Asclepias tuberosa).There are 10 other species of milkweed in our area through the northern Blue Ridge Mountains (summarized in the chart, below, with the taxonomic changes in milkweeds.) Butterfly weed is toxic to both humans and pets. Butterfly weed is easy to grow. Plants grow 2 to 3 feet tall and produce flat-topped clusters of bright orange flowers from July through September. Unlike common milkweed (Asclepias syriaca), butterfly weed (Asclepias tuberosa) does not have the quickly spreading roots that qualify it as invasive. Height: Up to 3 feet Blooms: orange, June to September Sun: Part sun to full sun Soil: Well-drained, poor, dry, usually rocky or sandy soil Garden Use & Maintenance: A stunningly showy wildflower with a long bloom period. Monarch’s Favorite Milkweed. One of our showiest native wildflowers, butterfly weed is also a … Their flowers attract several butterfly species, hence the common name. Butterfly weed (Asclepias tuberosa) produces green foliage through spring and summer and clusters of small red, orange or … Butterfly Weed with Tropical Milkweed Since many milkweed species serve as host plant for caterpillars and nectar source for butterflies, milkweeds also make good companion plants for each other. Butterfly bush is a large shrub that is a great nectar plant whereas Butterfly Weed is a short milkweed that can be used as a host plant by Monarchs as well as being a nectar plant. However, the Monarch butterflies have used it in my yard when it has been the first one up or when all other milkweed has been depleted. Butterfly Weed Butterfly weed (Asclepias tuberosa) Butterfly weed falls at the bottom of the list because most Monarchs prefer other milkweed plants. Monarchs favor a variety of milkweeds, and in fact, with variety they’ll lay more eggs. Asclepias tuberosa Perennial Forb Dogbane Family. Maryland Distribution: Poor, coarse soils of dry fields, rock outcrops, and other steep slopes throughout the state. Joe Pye Weed (genus Eutrochium) = not a milkweed Description : Joe Pye Weed is the common name of various species of tall, upstanding perennial plants with leaves that emerge from a central stem. Butterfly weed, a type of milkweed, is a favorite nectar plant for butterflies, and the leaves are eaten by the caterpillars of monarchs. How to Cut Back Butterfly Milkweed. The butterfly weed (Asclepias tuberosa) is a member of the milkweed family. 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