Common milkweed is not well behaved in a formal border.
It spreads by rhizomes, forms colonies, grows coarse stems, suffers chewed leaves, and ends the season as a row of dry stalks and splitting pods. Planted without enough room, it becomes a maintenance argument.
It is also a host plant for monarch caterpillars and supplies flowers used by many insects. That function cannot be replaced by choosing a tidier flower that merely attracts adult butterflies.
The case for the ugly plant is not that beauty standards are corrupt. Garden taste helps people live with and continue caring for planted space. The case is that appearance should be evaluated beside function and placement.
Common milkweed may belong at a sunny edge where spreading can be managed. A more compact milkweed may fit the formal bed. Seed heads can remain where they do not block passage. Unwanted shoots can be removed without declaring the whole species virtuous or invasive by temperament.
The plant’s damage can also be evidence of success. A caterpillar-eaten leaf is performing the host function for which the plant was chosen. That does not make every damaged plant healthy, but it changes the diagnosis.
An ecologically useful garden needs room for forms that do not peak in a catalog photograph. It also needs enough design discipline that their use does not become a demand placed on every shared surface.
Ugly is sometimes the wrong plant in the wrong place. Sometimes it is a plant being judged while at work.
Source
gardening/pollinator-natives.md