If you inevitability seed to grow things, how do you grow seedless grapes? ...

What do I do next to Datura pip...
Answers:    From cuttings. Many plants are propagated by cuttings rather than seed -- vegetative (asexual) propagation. This technique creates identical clones of desirable plants, while propagating by nut creates new combinations of genes.
Could you munch through grass?
cuttings.... or graft.... will get you modern plants when there are no seed to plant.............