ROTTEN EGG is made by splicing EVIL BRICKS and MAGIC EGG. ROTTEN EGG belongs to consumables category. No need for growspray here, will be done in a jiffy. Received experience is a mystery. Keep an eye out for the exp counter. ROTTEN EGG can be broken. Seed mathematics is very complicated, but you should get at least 1 seed back from splicing ROTTEN EGG. Gemratio of ROTTEN EGG is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Rotten_Egg">rotten egg</a> Massproducing ROTTEN EGG can be tricky. You will find out after you have harvested a few.