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According to paulowniasupply.com, the Royal Empress is non-invasive. "It’s non-invasive, environmentally beneficial and safe for children and...
Hmmm, so in other words, it is not illegal, it's just not a good idea to plant them. Right? I'm purchasing a new home and they put a tiny oak...
When you say a plant is registered as invasive, does that mean it is illegal? Also, the link Newt provided was for Paulownia Tomentosa. I'm...