The basic definition of a weed is merely any plant growing where you don’t want it to. Technically, an apple tree can be a weed if it’s somewhere you don’t want it to be.
I think the usual definition is closer to “a plant that REALLY wants to be in a space you don’t want it to be, and refuses to leave once it’s in”.
For example, I think it’s fairly uncontroversial to call grass a weed. Sure, we like our lawns, but they really want to spread anywhere they can. They are more aggressive than dandelions, and the only reason we hate dandelions more is their taproot.
The basic definition of a weed is merely any plant growing where you don’t want it to. Technically, an apple tree can be a weed if it’s somewhere you don’t want it to be.
I think the usual definition is closer to “a plant that REALLY wants to be in a space you don’t want it to be, and refuses to leave once it’s in”.
For example, I think it’s fairly uncontroversial to call grass a weed. Sure, we like our lawns, but they really want to spread anywhere they can. They are more aggressive than dandelions, and the only reason we hate dandelions more is their taproot.