If you want to improve the soil structure then something like Nature's Helper (fine, aged bark chips) or another 'soil improver' would be better than vermiculite. The vermiculite is a permanent solution, so in one way, it's good, but it will NEVER break down and will be there for years to come. The benefit from adding OM, which will eventually be broken down by the microherd in the soil, is that it will all eventually improve your soil, making it more permeable and more fertile. The vermiculite will most likely do nothing, long term, for the improvement of your fulvic and humic acids. I would check to see if there is a municipal source of compost, and see if they will deliver - if they won't, then borrow a pick-up truck, if you don't own one, and get a few loads. It should be free, or nearly so, esp. if you pick up. I know there is a commercial operation near here where a freind got a pick-up load of mushroom compost and top soil for about $30 (about 2 cu. yards). Have you been adding the manure and compost to your garden beds for the past few years? I repeat what I wrote earlier - if you have been adding 4" or more of OM each year for a number of years, then you probably should have pretty good soil by now. If, however, this is only the second year or so you have been adding, then, yes, you could probably add more. One source of free or nearly so, OM is the local tree services, and the companies that trim the powerlines - they end up with truckloads of chippings, and are usually happy to dump one or more loads if you ask. The main draw-back is that the chippings are fresh and pretty coarse, so you have to be able to let them sit for at least a year - 2 is better - before using them. They do make a decent mulch, 'though you have to pick out the bigger pieces. If nothing else, it's a good "brown" additive to your new compost pile. You might also see if you can get the "spoiled" hay or straw. If nothing else, and for the future, see if you can get the bales people have used for fall/Halloween/Thanksgiving decorations. By the time that they have sat out in the rain for a few weeks, they aren't really usable for either feed or bedding. Most people would probably give them to you, rather than have the garbage collecter take them, if their garbage service will even do so. I kinow nothing about the cotton by-products, they aren't locally available, so will let someone else comment on that.

I'm in NC, but will share my experience with finding CGM. I've been using it for about 5 years. The local nurseries do carry it, but I've found I can order it from a local hardware store (family owned place) for a whole lot less. The same bag would be over $40 at a nursery, under $30 at the hardware store, so it pays to shop around. The hardware store doesn't keep it in stock, but they order it for me. I use Espoma brand, but am pretty sure Safer makes it too (I know I used them when I was new to CGM). I would love to get it at a local feed store and spend less, but when I first researched CGM, I read the quality isn't the same and it may not have the same effectiveness. You might want to research that yourself, but here's a link that has some info: http://www.gardensalive.com/article.asp?ai=753 . I realize it's from a company that wants to sell you their product, but I did see similar claims in other articles as well.

Thank you all for the suggestions. I tried Sam's Club and Costco's. Sam's Club used to sell 25 pound bags, but not any more. Costco's had nothing. The side effects of cracked corn do not appeal to me at all. I might consider it as a last resort. The places I checked that will ship corn meal charge a lot for the meal, and shipping. The closest Agway is 128 miles away. What about food quality corn meal? As skoot_cat noted, it seems to be degerminated or enriched. Will that work at all for fungus control?

Yes it is perfectly safe to use both at the same time. In fact it is safe to use any of the grain type fertilizers at any time, day or night, rain or shine, all together or separately. There are no interactions among any of them that we know about. You can use them in amounts up to the smothering the grass stage (more than 50 pounds per 1,000 square feet). You will get some bad odors if you use more than 30 pounds per 1,000 square feet but if you are using corn and corn gluten meal at 10-20 pounds per 1,000 square feet, you should be fine. Where it might get dicey is if you used blood meal or fresh manure in large quantities. Personally I would never use fresh manure without full composting first. Blood meal is probably best used by mixing it with grains so that no more than 5 pounds per 1,000 square feet of blood meal goes out. Blood meal can get stinky fast and it can burn your grass roots. It is hard to control very light applications of it so mixing it in with something else is a good idea.