Discussion posted by: Arye ben-Shaoul
Weed is a very subjective term. There is no scientific definition that says: this is a weed, this is not a weed. They’re basically plants that are in a place where people don’t want them. People consider dandelions to be a weed, but if you just change your mind about dandelions, and you don’t mind them on your lawn, then they’re no longer a weed. Certainly, scientists will sometimes talk about weedy species, which tend to be plants that reproduce very quickly and tend to produce a lot of seed, or they can spread by underground roots. Some people consider weeds to be things that are non-native, but that’s not always the case.