Answer: I've never heard of this, so I don't think it's true. Roaches might be interested in hiding in dense landscape shrubs such as boxwoods, and they may be attracted to plants that produce seeds because the seeds are a potential food source, but as far as I know, roaches do not have any particular fondness of mimosa trees. Just to be on the safe side, be sure to keep the seed pods of your mimosa raked up!
Best wishes in your new home!
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