Composted, granular poultry manure is the best simple starter organic program. High in nitrogen 4-3-3, easy to spread, cheap to buy, melts thatch, good iron source.
It is full of beneficial microbes, bacteria, enzymes, fungi, and trace minerals.
Nobody here or on gardenweb ever talks about it.
20#/1000 sq ft, 4 times per year.
Sustane, cheap-cheap, agway natures way, espoma garden manure and many others. In connecticut, look up north country organics on the web.
About 4 to 8 bucks per hundred lbs.