Cow manure, horse manure, saw dust aged 2-3 years, and some pies to build compost as mulch.
the paper needs to be perforated. granted it weakens the weed barrier, but if one does not do that the paper can act as roof, in dry weather not a good thing at all. so things need to be done.
The great results first year are not exactly expected. and a variety of crops are planted to see which ones will handle the dirt from the heirlooms.
So some of the pants do sow nutrient deficiency in a week or so. some time was needed to detect which element. It looks like phosphorus and some nitrogen. Te plants are inter-planted with polyurethane companions. Flowers, herbs, nitrogen fixers. Coffee grounds much is added (slow release of nitrogen, coffee shops give used ones for free if one asked to save them for a day)
Other means employed too. Weed stew (some weeds like red stem fillary, bindweed need to be killed in how compost pile or drowned. the plants developed seeds, so drown it is. and closed well) aka green manure. not ideal, but $3 contained from thrift store works. if I find me a barrel I'll do that too, but that takes some time.
These were bough with some signs of nitrogen deficiency, but will see how celery will do. and nitrogen fixing neighbor :)
Onions show no deficiency at all. last autumn strawberry and sorrel and new organic transplants.
and weeds :)
older pile, about a month in making. turned twice. it could go faster, but...