I understand for sure, and good on ya for trying to minimize waste. Itās difficult to be 100% plastic waste freeā¦
I ended up ordering these since they are silicon and reusable via the dishwasher:
Iām gonna try them and see how it goes. It doesnāt have a humidity dome, but I keep humidity in the room at 60ā¦ I know thatās not super high, but I figure Iāll run one test like that making sure the coco doesnāt dry out via bottom feeds if necessary and see if I can do without a dome.
Those look great! Very nice! I have had these trays since the 90ās LOL! I am sort of a hoarder 
How about jiffy pellets, theyāre coco fibre and peat so can go into any medium? Remove the netting around them first though.
I personally did not have good luck with those. Not 100% sure why 
I use the jiffy peat pucks as well. I start the seeds in the pucks, then after a few weeks I transplant them into 18oz party cups of pH and buffered coco. Final homes are 1 gal plastic pots filled with said coco.
Sorry I didnāt quote it right lol! 
I go straight into those starter trays without coco for tomatoes. I am just trying it now for cannabis. I might screw it up the first go, but Iām done with cubes too.
Do you mean with coco? Or do you use something else in the tray?
yup 72 cell 1020 tray insert thats cut down to various sizes cost like $3 each cell is about 4cm and i use coco when i use them.
They can be a disadvantage when trying to keep the growth up on autos, but still can run about a week and you can select from that point.
Sorry ā with coco. Got autocorrected.
I am a dirt grower, but I use the root riot type plugs with great success.
What Iāve learned is to use them upside down so there is a gap between plugs and any water in the starter tray. Less chance of over saturation and rot.
I think Iāve seen you guys basically sprout seeds in a paper towel and then bury the sprout like half way down with the cotyledons above ground?
Is there a name for that method? Iām wondering how that works
In the past, honestly last couple years I just float my seeds in water with some h2o2 mixed in using an old contact case, once the seeds throw a tail in a day or two they get planted usually under they are cm in length. Only time they go wrong is if say I have some bacteria present from reused coco that I didnāt mute down or kill in the first place and thatās doesnāt happen too often.
Wouldnāt really be doable, it wouldnāt fit after hydration.
Drill a hole into the center and place an oven thermometer probe in said hole, thatās what Iām gonna try.
Oh, there it is.
Gives me another reason to use mine anyways.
Edit - Iāve been baking coco all day now. I have it in a pot covered with tin foil, and Iām using this:
I have the āmeatā probe poked through the tin foil down into some of the coco in the pot. I had broken up the coco to fit in a smaller oven but changed my mind. If I wanted to do a bigger solid brick/piece, Iād drill a hole and snugly insert the probe. Or, you can easily split the coco brick along/with the grain (the sides) or pierce it with the probe maybe.
I have experienced it.
