Grodan RW205002 GL56707445 GRO-Smart Tray, 78-Cell, Terracotta (3-(Pack))

Rarely do I give 5 stars without hesitation, but this product is incredible. It's hard to be too impressed by a plastic tray, but this thing is the king of plastic trays. It's so popular for good reason. You could drop it off a building and then run over it with a truck and it would be good as new (figuratively speaking of course.) I think everyone who is starting seedlings should have one of these, regardless if you are using grodan cubes. You can use rapid rooters, pack your own, place regular drain pots, really any type of medium, even larger than 1.5" if you flip the tray over and use the underside which is divided into larger sections. It's a pricey piece of plastic, but it will last forever and in the long run will save you money and time from having to replace cheap crappy trays over and over. Just get one.

I should have gotten this tray about 5 years ago. I was convinced it wasn't worth it given the price. I was convinced other, DIY alternatives were equally as good.Nope.This thing is great. If you are using Rapid Rooters, Root Riots,or A-OK 1.5" Rockwool cubes, just order this now.The plastic cells and their walls hold a nice layer of humidity and darkness around the -- in my case -- rapid rooters. This results in much fuller rooting than if you were to DIY and just use a rapid rooter upside down on a tray with a bit of water, or upside down on a self irrigated seed tray using perlite to wick.Also, by keeping the plug raised from the water, the plug is kept at its appropriate water saturation level longer, especially if humidity is appropriately controlled and maintained. This lets you easily see if you need to add more water or not, keeps your 1020 trays cleaner, and expedites your germination or propagation.I bought the A-OK 1.5" rockwool plugs specially to use with this tray and was glad I did. While not necessary -- the tray works great with rapid rooters as mentioned, jiffy peat pellets, and various other grodan products -- the tray was pretty much designed for them. I wanted plugs that would fit snug in the cell to have roots grow down instead of being air pruned. This tray allowed for that.Durable and easy to clean, this tray will last me a long time.Highly recommend this product and will likely be ordering a couple more.

bought these back in 2014 to use with our hydroponics system. We put the seeds in Stonewool (rockwool) plugs then insert them into this tray. Then when the seeds started to germinate, we transferred them to the hydroponics.It's sturdy and durable. These do not get soggy and holds moisture for the seeds. It's very useful for us. We still use this. It's a good product, no flaws with it. Very happy with this product

In use as we speak very nice how it's elevated from bottom of grow box. Perfect for when seedling are being top fed and Roots are just now starting to poke out bottom of rockwool cubes. With it being elevated the roots will continuing growing an searching for water verses if they were flat on try an have no where to go and in most cases either Hendersonville NC new development or start coming out the sides of rockwool cubes.

Very, very sturdy, you could probably stand on it and it wouldn't break. I'm using it with the Grodan A-OK plugs and it works perfect, holds the plugs out of the water and my seeds germinate quickly and reliably. I'm using this for vegetables, so after they sprout in the A-OK, I just stick the plug in the ground in my garden.

I haven't found anything this sturdy and of outstanding quality. You can use this two ways for deep or shallow cubes. It doesn't fit inside a tray from Walmart or any normal starter. So I went to Greenhouse Megastore and found it will fit in their Extra Large propagators with room to spare on the ends, maybe another small plant or two can fit In the dome with this Tray.

Great product and a must for anyone use rock wool cubes for a growing medium for seedlings or clones. If you get tired of your plants tipping over before transplanting to a larger cube or dirt this will eliminate that worry forever. I had 86 tomato plants in this tray for over a month and the all grew like champs. Some crowded others out and roots grew into other cubes but about 80 made it to the transplant and are still going strong with hundreds of tomatoes on them now as long as winter doesn't get them

Could not figure out how best to use this tray. When the rockwool cubes sit in the slots they are quite far from the water tray underneath. Therefore, there is no wicking of nutrients or water and they dry out. The other way of doing it is to use a system in which the cubes are sitting directly on the 10-20 tray underneath and can wick the fluid they need. With these grodan trays my seedlings were drying out under the T5 lights.