Swamp Milkweed Tree

Growth Facts

Swamp Milkweed

Asclepias incarnata
Rose-pink blossoms and food for monarch butterfly caterpillars.
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The monarchs applaud your choice! You may choose Swamp Milkweed for its intricate, rosy pink flowers that give off the delicious scent of vanilla, but monarch butterflies view this Spirit as a life-giving host plant. Milkweed leaves are the only thing that monarch caterpillars eat. Fritillaries, swallowtails, and many other gorgeous butterflies may also visit its blossoms to sip its sweet nectar. Hummingbirds may zoom in for a drink, too. Plant Swamp Milkweed within view of your deck or patio, so you can enjoy watching the aeronautics of all the winged creatures that come to visit this special plant.

Growth Facts

The Story

Milkweed was a hero in World War II. When Japan occupied the Indonesian island of Java, the Allies lost their access to tropical Kapok Trees, which provided the buoyant stuffing for life preservers. Resourceful engineers looked to the Common Milkweed and the Swamp Milkweed instead, which produce little silky floss parachutes to carry their seeds through the air. The floss served as an excellent substitute for Kapok fibers, and American schoolchildren were recruited to gather Milkweed pods for the war effort. It is estimated that 11 million pounds of Milkweed were gathered for the troops!

The Details

As you may have guessed by the name, Swamp Milkweed enjoys a site where it can receive plenty of moisture. It’s perfect for a rain garden or for that low spot in your yard that always seems to stay soggy. However, it does just fine in regular garden conditions, too.

How to Grow

Grow Swamp Milkweed in full sun for best results and irrigate regularly. Do not let it dry out. Plants will be tall and lush in wet soil, a bit shorter and more compact in average conditions. One problem that may affect Swamp Milkweed is aphids feeding on the new growth. Simply knock them off with a jet of water from the hose. Do not use pesticides on or near this monarch butterfly host plant! Cut plants back in late fall or any time before new growth appears in the spring. Swamp Milkweed is late to emerge, and it’s a good idea to mark its location before it goes dormant for the winter, so you remember where it is.

Size Guide

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Swamp Milkweed Tree