Question

why weeds are grown in gardens,fields and forests?

Answer 1

weeds are very special plants in that sense it is for supporting the ground from eroding helping the trees to stand tall also preventing some dangerous insects to the plants it is for the beauty of the earth showing the land is fertile like an indicator. 

Answer 2

Weeds are plants that are grown mostly everywhere where there us good soil fertility it absorbs water a lot.There are common and poisonous weeds.
Exampls: Amaranth,Bermuda grass ,Bindweed,Burdock