I bet that was a hit, Alex!
Holly, I buy Sunshine Mix here. I assume it's pretty much the same mix as Pro-Mix. Both come from Canada. I usually buy a couple of bales, and have half of one left by fall. I always have things to repot or bump up before winter and that finishes the second bale. I used to buy the bales through the Master Gardener co-op, but found the feed store was the same price (about $33.), and readily available. I will try adding the fertilizer pellets to the mix instead of adding to each pot individually. Saves a step!