On Wednesday night's show, I thought that the instant wildlife meadow, using a turf carpet, was a brilliant idea. A genuine flower meadow is so difficult to achieve, and the solution (wildflower turf) is so simple.
I've never seen wildflower turf for sale at a garden centre, through many garden centes do sell rolls of standard turf, to take away.
Googling for 'Wildflower Turf' finds several suppliers. One website gives their formula: 'Cats Ear, Salad Burnet, Meadow Buttercup, Yellow Rattle, Ribwort Plantain, Lady’s Bedstraw, Yarrow, Cowslip, Self Heal and Red Campion'. Only one website was quoting prices, which seem to be about £27 for a 1.25 meter square. Not that expensive, IMO.