No, don’t wet cardboard.
Yes, use the manure with two provisos. a) test it for aminopyralid first. b) I know they’re wonderful to have and vermicompost great for the soil etc but I would try to remove as many red worms on my site as I could. That’s because I have an issue with moles and they love the worms more than I do. However, you may not have a problem, in which case go ahead.
If you’re worried about
the seeds you could either, top it off with a layer of shop bought compost (often reduced at the end of season), or wait until the top layer of seeds germinate and hoe off before planting in earnest.
Either way you will have your work cut out with horsetail and bindweed, but it will lessen over time.
Jan
