posted 7 years ago
Yes, you'll need to continue to add mulch as the soil microbes will continue to eat all that wonderful carbon on the surface. And as said above, as the soil gets more and more healthy, the mulch will break-down that much quicker. Once those chips become fungal dominated (the goal), you'll need to add at least 4 to 6 inches of new chips every year.
Where are the weed seeds coming from? They must be blowing in from somewhere. If you can attend to those weeds and minimize the number of seeds you are dealing with, that will choke off the problem before it sprouts in your garden. But the good thing in a wood-chip intensive mulching system is that weeks easily pull up from the loose soil. If they are old seeds, they'll eventually all sprout and you won't have to deal with them anymore.
"The rule of no realm is mine. But all worthy things that are in peril as the world now stands, these are my care. And for my part, I shall not wholly fail in my task if anything that passes through this night can still grow fairer or bear fruit and flower again in days to come. For I too am a steward. Did you not know?" Gandolf