The spring and summer is great for weeds and I rarely need to buy anything for my torts. I just pick what I need outside. However once late fall and winter arrives I need to resort to store bought. I try my best not to get prepackaged spring mix because I can rarely find it fresh enough. There's usually some browned out slimey lettuce in there. I mix it up between fresh red leaf lettuce, dandelions, rodicchio, mustard, parsley, and some kale. Then I'll supplement with Mazzuri. Once everything starts coming back in the spring I revert back to weed pulling.