Q.My Green Gage Is Not Flowering Or Fruiting, it’s 12 Years Old
Do I need to feed it or get b chainsaw out

Certified GKH Gardening Expert
Greengage plums are known for their consistent and reliable flowering. However, like any fruit tree, there can be variations in flowering patterns based on factors such as weather conditions, pruning practices, and overall tree health. While it is not common for Greengage plums to completely stop flowering after a certain number of years, it is possible for the flowering to decrease over time. Regular maintenance, proper pruning, and providing optimal growing conditions can help ensure continued flowering.
It may help to feed it, give it a good pruning, and ensure good pollination from a good variety of insects, as ridding of the insect population can drastically lower pollination, as well. At the same time, detrimental insects can lower fruit and flower production.
https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm
https://www.gardeningknowhow.com/edible/fruits/plum/growing-green-gage-plum-trees.htm