Q.The Article On Swamp Milkweeds Help Me Differentiate Between My Swamp And Showy Milkweeds. One Thing Was Incorrect Swamp Milkweeds
do not have tap roots and only spreads from seeds. Common milkweeds have tap roots and spread from underground. I just don’t want others to get discouraged thinking they are invasive. They grow in my zone 4. Thanks.
Certified GKH Gardening Expert
I found two reputable sources that said swamp milkweed had a shallow, fibrous root system. That is basically what the article says; there is no mention of a taproot. The clump would increase by the spreading roots as noted. I don't think that will scare anyone off.
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