Hello everybody,
I hope all of you and your dear ones are fine.
Looking for your views about my small magnolia coco.
Leaves are presenting burned tips, very crispy, nevertheless new leaves are growing.
I'm suspecting salt built-up over the winter, so I went this morning and did a good flush of the mix (seramis, lava, reptibark).

Is this due to fertilizer/fertigation?

Is this rather a fungus issue?

What would you do?
Thank you,
Michael