I like Trax Farm. I think it offers a ton of great services and a lot of fun. The fall is especially special at Trax Farms. I have never seen so many pumpkins in one place. The shopping of their local/homegrown and homemade items is unique and a special experience. Their apples and apple cider are to die for. I also enjoy their wine selections and wine tasting. If you have never been, stop in and see everything have to offer.
Trax has a nice selection of gardening equipment and supplies, as well as a large selection of perennials. The selection of annuals is just ok. Over the past few weeks I have stopped here to pick up mulch and they had a difficult time finding someone on site to run the bobcat (or whatever machine they use to dump the mulch in the back of a truck bed). I even called ahead one day to make sure someone was available to do it and still waited for 20 minutes or so. I don't hold that against them, as I thought their prices on bulk mulch were competitive. I do enjoy how their store front changes with the seasons and offers a beautiful selection of different items with the seasons and holidays.
If there is a negative, I do think their prices on produce and food are a bit high. I am all for supporting local businesses, but I think that you can find a lot of the same items at other places for less.
If you cannot make the trip out, Market District in Bethel Park sells their corn and apple cider, as well as some other items.