Just got my first greenhouse & the Mississippi River is already testing my setup

I live in a stilt house on a small island on the Mississippi River in northeast Missouri, I’ve been here just over a year & have been wanting to start growing my own food as well as flowers to sell for extra cash in town. I finally got a way to do it figured out since I can’t put down raised beds or anything permanent on the ground & even using stock tubs wouldn’t work since trying to move those when they are full when a flood is coming in would be a disaster. My deck is too tiny to really do anything with also. My mom (thanks neighbor!) helped me get this little greenhouse & pontoon to set it on & it just got delivered last weekend. The river decided to start coming up past flood stage a few days ago & still has about another foot predicted to go. So, we had to scramble to have my dad help secure everything today (greenhouse to pontoon & steel-cabled the pontoon to a couple of the concrete pillars my house is on). Thankfully I have a full set of waders to be able to get to the pontoon even if the flood comes up more than predicted this time or in future worse floods :) One big question I’ve got is, can I use the river water for extra nutrients? Or would that not work? I’ve been keeping a couple house plants alive & watching lots of YouTube & but any tips for a newbie greenhouse gardener would be super appreciated, thanks! submitted by /u/Glowing_Trash_Panda [link] [comments]