You place it, put a keg of water (or keg of sea water), fertilizer and a water plant (fiber plant, aquatic poppy, sea yeast shroom, elastin plant or slime bacteria) into it and hook it up to the power. Currently it needs something that drains power constantly on the same relay/junction box you put it on or it will not turn on.

Next patch will rework the entire thing so you'll manually have to turn it on and it'll flash orange if it's missing an ingredient. It'll then also save progress so if you lose power for a second or go through a loading screen it won't reset the growth timer for the plant anymore.

Any chance of adding the ability for them to work other seeds? Like the saltvine, tobacco etc?

Originally posted by Choco:

Any chance of adding the ability for them to work other seeds? Like the saltvine, tobacco etc?

Not really. I've adjusted plants to not grow as big (and thus ripen a bit faster too) so they don't cover the entire wall and buttons to make normal farming more convenient.