read this write up aqua did on coco to get our watering down, FOFF is mainly coco and i would treat it as such. Watch out because even with the wetting agent coco can really easily become hydrophobic.
Ok writing this cause i see this issue often and rather have a thread to link than explain this each time. This is not my work but a collection of info from many members here and I have put into practice myself. So first off COCO is NOT soil. For best results we want to keep it saturated...
www.thcfarmer.com
And next time you transplant this is my tek; fill your desired up pot to the level desired and then water the entire media, go ahead and dig around a bit and make sure its all wet then excavate the area where you want to plant checking the soil line by placing the cup or pot into the area excavated. Once its deep enough you want to sprinkle some
mykos or greatwhite or whatever mycorizal product desired, then remove your plant from its pot and place into the hole fill hole around the plant with dirt then lightly compact the soil and shape a dish. next water the whole pot until run off. shouldn't take much. Now you mentioned that you want your roots to get oxygen, which you do but not in direct contact but rather moved thru your soil by microbes. Dry pockets from skipping watering it in will oxidize and burn back your roots. Ever left a root ball exposed? Dies back rather quick, turns brown and dies from exposure.
And some folks advise burying your seedling and personally do not advocate this. Possibly when they are tiny and those little white stems can still be converted into root stock but i doubt it. My opinion is that a plant wants to be sedentary, it wants to face the same direction and wants to be buried at the same soil line it has always been at. Now heres a fact, when you transplant larger plants deep their stem will rot and will not grow roots naturally.
Just get some bag seeds and play around till you get it. Seedlings can be tricky at first but once you get it its really easy, i use T-5s like a foot away and have no stretch issues...