last year i purchased part of a field of year old field grass, weeds , docs etc and spent 12 months of backbreaking work scrapping, rotavating rolling raking, rerolling and finally sowed with meadowmania wildflower meadow grass mix the amount needed was a few hundred pounds and I delayed sowing as we had acold wet march very hot period early April but got the seed down about mid April I was disappointed that the seed was very slow to germinate even though the weather was good I even kept it watered in hot periods but it was so slow that the natural field course grass and docs and chickweed are now smothering everything I have no choice but to wait 12 months to see how things progress but if I wasn't out there most days selectively pulling up great clumps of chickweed and course flat growing field grass everything would be smothered so at the moment I am sumwhat a deflated client time will tell