Hazelcrestmikeb said:
Michele, 20 bags would probably last me forever around here. 
I take it that you are lifting your plants and redoing the beds as you divide your plants for lining out????
Plants get divided every year here and potted up for sale so when the beds are empty I replenish them with all the amendments before replanting the ones I plan to keep and use the following season. It just depends on if I have everything (and the $$$) at the time if it gets put in at this time. Some things may get added in the planting hole and/or top dressing.
Everything I use, in no particular order or when I put down.....I usually have to add pine bark as it breaks down or gets shoveled out with the plants then I add alfalfa pellets, slow release fertilizer (I use the 270-300 day release so I only do this once a year), quick release fertilizer for a quick boost at planting (lawn fertilizer) if we have it on hand, Milorganite, chicken litter (the processed, dried kind), Epsom salt, and I will add lime to the beds if the Ph needs adjusting. I have used rabbit manure but it's hard to come by here and in the beds I used it in there were even MORE worms than my other beds.
Here's a link to an article I did last year
http://garden.org/ideas/view/t...
I don't always do things in the same order or at the same time but I generally add the same stuff at some point to the beds and pots.
