- Make sure they have plenty of water when they are in bloom and the fruit has set. Here in Portugal, they drop the fruits/flowers at the slightest hint of dryness. The only time I got fruits from mine, the water line had punctured and a small pond had formed around the grumichama, which was growing on a raised bed. Ref: Sérgio Duarte, Algarve, Portugal
- Yellow Grumichama Get a cutting grown one otherwise seeds can go either black or yellow.