Invasive Weeds: Identification, Spread and Safe Disposal

Water Lettuce (Pistia stratiotes): Identification, Why It’s Invasive and How to Control It

How to identify water lettuce, why its mats choke ponds and canals, where it is illegal to keep or sell, and how to remove it by hand, herbicide or weevils.

Japanese Knotweed, Giant Hogweed, Kudzu and Water Hyacinth: How Four Introduced Weeds Became Invasive

How Japanese knotweed, giant hogweed, kudzu and water hyacinth were introduced, why they spread, how to identify them, their legal status and control.