Haya Jolly, I gotta ask, what is the basic climate you live in? I live in a "green" desert, arid but with lots of shrubbery and palo verde trees (the devils bush!). I have AC instead of a swamp cooler so I am basicaly screwed on the humidity aspect of things.
I have successfully colonated a bunch of jars with different strains but so far have gotten only a single little shroom to fruit. ok, wasnt really little but it was just one, so far no more flushes. Very frustrating project, but thankfully is pretty damn cheap.
Anyways, my best jars were a 50/50 mix of coco coir (found in bricks in pet stores, used for reptile betting as well as plant grow medium) and fine-cut vermiculite. Moistened that mix first (just barely moist, you want to squeze it and not see more then a drop or two of water in your hand) then just add in the flour until lightly coated. I just eyeball all this shit. It's like cooking, ya know? If you didn't make enough to fill all jars, make more - no biggie. I must add, the coco coir should be a fine cut - you can see in the packageing, if it's not fine cut you will see what looks like wood chips pressed in it. That stuff is a bit too course. It is also compressed and very dry. You should spend the time breaking it up as much as possible dry in the bowl first. Add water slowly always mixing it. It flufs out alot. What looked like powder in the bowl now looks more like fiber. ADD WATER SLOWLY. You don't want to use too much. After the coco coir is a good consistancy, add in your verm, then do the flour last. The make great jars. I also use bottled spring water for the water.
I can make one hell of a jar, but only one shroom. What I was doing was using those tin pound cake loaf pans with a bed of moist (again, not too moist) coco coir. Crumble the cakes on top, cover with foil, and stabalize a few days. I then put the pans inside a rubbermaid tub which has 3 inches moist purlite in the bottom. Move to cooler room and give em light. Oh, the lid to rubbermaid has a plexiglass window in it - 5 bucks at ACE hardware.
If I try this again, I am going to skip a step. I think I will just crumble the cakes in the bottom of the tub, on the bed of coco coir, skipping the tins and purlite. This ways, with small holes in the bottom of the rubbermaid, you can soak the entire cake in another tub the same size.
Anyways, hope this helps ya out in the future for making jars! Good Luck!