Bests & Worsts Reviews from Amazon

These domed seed trays are a fantastic buy. The small size gives you the freedom to squeeze them into small spaces, to start smaller batches of seeds, and to maintain different climate conditions for groups of seedlings. A cheap and space-efficient way of setting up these little greenhouses is with a laundry cart. You can fit three trays per shelf on the Honey-Can-Do 3-Tier Laundry Cart. If you have space for a more traditional layout, you can fit 6 of the black inserts into a 1020 tray. I have succulent propagations set up like this, and I use the leftover trays and domes to house African violet propagations in separate 2.5" pots. Update: I've used these for about a year now. I'm still very happy with them. I have used them for multiple rounds of seeds, as carry trays for other pots, as drip trays, as small baskets for clippings, and so on. I've washed them, bleached them, sprayed them with the "jet" setting of a garden hose, left them out in the elements, thrown them about, filled them with gravel, and generally abused them without care. I've used the inserts to hold peat-based soilless potting mixes, coco coir mixes, and long fiber sphagnum moss. Of the 30 tray+cell+dome combos, only one of the cell inserts has cracked (though others are discolored) and just three of the white plastic trays have developed holes in the corners. The cell inserts are no big deal. Because they're are standardized to fit in a 10x20 tray and are sold in hardware stores in the spring and online year round, the inserts are very easily replaced. The trays, of course, are the bigger loss. The ones with holes are still useable for everything except as bottom-watering reservoirs. Two of the three have just pinprick holes, so I may put a small dab of silicone caulking to see if that fixes it. The third is in worse condition. The corners are clearly the weak spot on the trays. I can see them slowly wearing thinner. If you use these as intended, this should not be a problem at all. I'm doing all kinds of things to wear the plastic down on these including repeatedly sliding the trays across rough floors while they hold heavy pots, and squeezing them into small places, crunching the corners in the process.