Why is my grapefruit tree I bought last year dropping leaves
A grapefruit tree, about six foot, is suddenly dropping leaves. Is this a problem?
Yes, this is a problem. Factors that could be affecting it are temperatures, possible cold damage, how long since you planted it, water, even diseases or pests. This article will give you some basic information: https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm