Look at the course offerings and tracks within the closest majors, and also research you could potentially participate in as an undergrad while majoring in biology, ecology, botany, etc.
Also, I don’t know how far from home you want to go (sounds like you’re on the east coast) and/or how much $ you want to spend, but UC Davis is a tippy-top school in this field as well, and has a Plant Biology major with a Plant Breeding and Genetics option within the major. OOS tuition is pricey though.