system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does grass make pollen?

I can’t find any answers online, all I find is articles about allergies. I thought maybe the grass didn’t make pollen until it grew very tall and flowered but these allergy articles talk as if grass makes pollen no matter what stage of life, they talk about mowing your lawn and allergies. Unless you haven’t mowed in a year your lawn isn’t going to flower.
gpt
It depends on what type of grass it is. In particular a lot of common lawn grasses like couch will flower when still quite short. For wind pollinated grasses it can be hard to even tell when they are flowering too unless you look closely - because they are pollinated by the wind rather than by insects they've never evolved the need to have colours, etc to attract insects so their flowers are roughly the same colour as the rest of the plant.