First of all, I thought all plug trays were pretty much standard in size but these plug trays are a whole lot larger than any of my existing plug trays. The plug cells are surprisingly approximately the same size cells as my old 13x2 plug trays. On the positive side, I am impressed the propagation mix stays inside the cells and does not fall out the hole in the cell bottom so maybe I don't need a bottom tray with these. I bought them because they were a lot sturdier than what I was using and so far that has been the case. These trays do not bend which is nice when filling the cells with prop media. With my old plug trays I have to put them in a base tray to carry them around when filled with plants while I can move these trays around full and they do not collapse. The spacing between cells is tighter meaning more plugs per square foot which I think is a benefit (more seedlings on the table). With my old plug trays, they nested when I stacked them empty for storage but were hard to get apart without damaging them. These do not nest but they do stack which is something I like. On the negative side, my old plug trays had a shallow groove between cells that allowed me to water between the cells for delicate seedlings just breaking ground. Because these trays are physically larger, I cannot use my old base trays for bottom watering which a rarely did so not that much of a negative. The only other negative attribute is the cost. I can buy a half case of my old plug trays for what just one of these trays costs. My first round of seedlings are just getting started so I cannot comment yet on haw easy the plugs will release when I go to transplant. Even with as much as they cost, if this round of seedlings is successful, I am probably going to buy a lot more to replace our old plug trays.
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