Draining it and using superglue would be the easiest option - some plants you'll be able to wedge where you want and some will plant in the substrate - but if you want plants along the wood it will need gluing or tying. With moss tying may be easier - but javafern/anubias etc. gluing is.Another question is how am I going to attach ferns and anubias etc.. to the rocks? I can't take them out... I can't get around the rocks with cotton, and the tank is filled (although I can drain it)???
Superglue also leaves white spots on whatever its put on wood, rocks etc that stays visible for ages. So if you use it dab the spot somewhere you can't see it if possible.superglue... runny one makes a mess