Posted: 19/04/2015 at 08:43
If you've had a weed patch, dug, sprayed or whatever, you'll have long term germination of more weeds. Sowing direct will give you the problem of sorting out which are weeds. Dandelions and docks are great seeders and hard to pull out, if you don't get the whole root they come back. I think I'd wait and see what comes back after we've had a rain and things are growing. If you have regrowth of perennial weeds, spray when they've grown plenty of leaves. If it's just seedlings you can hoe them off.
What sort of wildflowers are you thinking of?