Posted: 08/09/2015 at 18:27
You need to decide what sort of meadow you want. Cornfield type flowers in cultivated soil/ flowers in grass/other. The really bright ones, poppies, corn marigold etc don't grow in grass. They'd be there the first year and then gone.
In general terms; sow now, it's what the plants are doing. That is if you're talking about native plants