Yesterday evening I replanted the so far thriving Birch #001 and the not so healthy lookin Oak #001 and Birch #002 Kitty litter from the swedish brand Eldorado. A completely different type of litter that is 100% danish moler clay. Please excuse the crappy photo quality.
I've moved the two waterlogged plants back to their protected spots in hope of a speedy recovery. Now let's just hope for the best.