aggressive native irises


 

The Flora of North America says:

"Iris versicolor is becoming a weed in New Brunswick, Prince Edward
Island, and Nova Scotia. Livestock will not eat iris foliage, but feed
voraciously on the competition, thus giving the irises plenty of room
to expand."

I believe this is true of missouriensis and longipetala as well. They
only spread aggressively under unnatural circumstances. It's basically
gardening by livestock!

Sean Z



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