"............ Have you actually done this? I haven't seen anyone
successfully turn an area into a wild flower meadow. It seems that in a
year or two you have a weed infested area that is dominated by one or two
species .........."
I am in the process of turning a plot over to this, many in the UK are now
well over 5 yrs old, and in Holland they have been doing this for around 20
years, and there is No way we would ever burn, this is the point of mowing
when the seed is set and then leaving it on the ground to give it time to
drop and thus re seed the area.
It is also why you add seeds of other wild flowers suitable for your area.
Mind you, if you regard all wild flowers as Weeds then this is defiantly
not the answer for you.
I was under the impression that you would be deciding in a year or two if
you were going to build on the plot so were not looking for a long term
answer and didn't want to spend much money on it.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk