Hello. I'm new here. I want to ask some of the senior members here if I should worry if I detect my dendrobium top leaves (new cane) turning yellow. Top leaves are slowly turning yellow and it looks like I might lost its top leaves. The rest of the leaves are still green. Is it true that particular cane will cease to grow once we lost the top leaves? Is it alright to fertilize a tsp of epsom salt in 1 gal water to perk them up? TIA.