cultivating help

[zolio]

I hit 200 cult few days back. I have been saving my seeds from dungeon runs, I grab my crimson monkshood seed out of my bag and i being to grow,. I added soil, water and, nurt to insure I get my seed back after harvest, but for some reason it will not let me break it down to get seeds back from the main ingred now ?? Did i do something wrong ? Need help please.