Talk:Irrigation Tower/@comment-2A02:908:1B2:C280:A16E:A567:DB5A:CBA4-20181010122320/@comment-33660215-20181010171122

You can connect as many planter boxes as there is space in your fertilizer tower. You then have to refil the tower any time the boxes use fertilizer. I have not noticed any diminishing returns. You just need to watch your fertilizer levels, or put enough fertilizer in your helper box once you have a helper and have them watch it for you.