>> A nice clean composted bed can be ruined in a hurry with careless sheet composting of seedy weedy plant debris.
Oh, you SAW my attempt to pamper some lettuce seeds by covering them with sifted compost?
I never before saw such a healthy, dense and vigorous monocrop of weeds in my life!
The really sad thing is that I PUT those flowering weeds into my small, cold compost heap and rotted them for 6+ months. Some gardening advice is very good advice! "No weed seeds in the pile" is good advice, even if weeds are all you HAVE to feed your heap.