Q.What do you fertilize grapefruit trees with?
My grapefruit tree is from a red fruit tree and is years old. It is about six feet tall and thirteen to eighteen inches around. It had fruit on it three years ago but none after that.
Your grapefruit tree will benefit from a slightly nitrogen rich or balanced NPK fertilizer (such as 8-8-8). Additional information on citrus tree fertilizer can be found here:
https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm
This article will help explain the reasons why your grapefruit tree might not be bearing fruit:
https://www.gardeningknowhow.com/edible/fruits/grapefruit/grapefruit-tree-not-producing.htm
This article will give you more information on the care of grapefruit trees:
https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm
