Only half of plum tree leafed out
So I've got a plum tree that was doing great last year. It had huge growth and was honestly my best performer. Im located in northern part of country and we are coming out of an extremly hard winter. Everything I plant is either rated for my zone or below.
That, said, this plum tree (burbank) flowered and then started to slowly leaf out. However, half of it stopped and all the flowers turned brown. The other half continued to flower and leaf out like normal. So now I have a tree where half is naked and the other half is full of green leaves and flowers.
I did a scratch test and it's still green inside. Im honestly not sure what the deal is. It has no signs of disease or injury. Also, everything seems incredibly off this year. Everything is taking so long to bud and leaf out. Ive already lost several trees that just straight up died over winter despite being incredibly healthy last year.
Any thoughts or help would be appreciated. I've got clay soil I think it might be nitrogen iasue because the leaves look palish green this year.
I guess for now im just going to leave it for another month and then prune off all the branches that dont leaf out.