Get a couple of those cardboard "trays" that you can pick up at the
supermarket (the ones that vegetables come in) - spead the petals in them,
stack one above the other & turn the petals occassionally & they should be
dried in no time. I don't recommend drying them in the oven. I have been
making pot pourri for years & this method works well. You could also spread
them on newspaper but the boxes take up less room.

Jayne