I have a container grown blueberry which I am about to repot but the leaves are turning red.... magnesium deficiency? If so, what specifically can I feed it and when please? Many thanks
Blueberry plants are also susceptible to either iron or magnesium deficiencies.
Read more at Gardening Know How: Fertilizing Blueberries – Learn About Blueberry Bush Fertilizer https://www.gardeningknowhow.com/edible/fruits/blueberries/blueberry-fertilizer.htm