plum trees

Question

Should I plant [2] two different subspecies of plum trees for better yield?

Answer 1

It depends on what type of plum you are planting; some are self-fruitful, some need to be cross pollinated. Find out this information when you select your plum varieties. These articles have more information on plum growing: https://www.gardeningknowhow.com/edible/fruits/plum/growing-plum-trees.htm
https://www.gardeningknowhow.com/edible/fruits/plum/satsuma-plum-care.htm