Question: Can you give me recommendations on how to control purple loosestrife? Answer: Jonathan Foster, Home Horticulture Outreach Professional This is purple loosestrife (Lythrum salicaria), the pretty, but wildly aggressive colonizer of fields, wetlands and roadsides all across Maine. The bad news is that it’s extremely difficult to control–it seeds prolifically, forms dense and resilient read more Can you give me recommendations on how to control purple loosestrife?