Thanks! He is lev 8, almost 9 in gardening. I believe I remember now seeing the grafting recipe for the death flower. I didn't know what it would be used for at the time so I ignored it. : / I might cheat his fishing level up. He's currently at 6 1/2.
Edit: I found out that grafting a lily onto a snapdragon creates an orchid then grafting the orchid onto a pomegranate tree creates the death flower. Fortunately, he already has snapdragons and lily flowers and some pomegranate trees. It's fall in the game now, but all the plants are inside a greenhouse.