We live on a creek, a tributary of a river that goes into the Chesapeake Bay. Our waterfront is protected by riprap. We have an awful time with poison ivy and other plants growing on it. Is there an herbicide OK for waterfront property?
Because you live in what's designated a Critical Area, it is essential to use the correct herbicide. Glyphosate is often used, but it must be in a product especially formulated for use near water, such as Eraser or Rodeo. Do not use any version of Roundup. Not only does it have other herbicides mixed in, but even the "inert ingredients" are toxic to aquatic life. Contact the Maryland Department of the Environment to get a permit to apply herbicide near the water. This can often be done over the phone. Find out more about the state's Critical Area Commission at dnr.maryland.gov/criticalarea.
Cherry laurel on one side of my front stoop thrive and on the other side all are close to death. Not sure why. Any thoughts?
While most of the leaf browning is probably winter damage, cherry laurel is very susceptible to borers (specifically peach tree borer) and voles. Mulch piles on trunks holds moisture on the bark, which is not a natural condition for plants. The stress attracts borers and provides safe cover for the voles. In addition to gnawing on trunk bark, the rodents tunnel underground and eat roots. Pull mulch from the base of shrubs and inspect closely for borer holes or the gnawing of voles. We recommend that mulch be no more than 1-2 inches deep and kept back a few inches from the bases of plants. Find more information on voles and borers using the search box on the Home and Garden Information Center website. Cherry laurel performs poorly in heavy clay soil, especially ones that do not drain well. Full sun also stresses cherry laurel and may be affecting one location more than the other.