I planted some laurel in a container last year. Now it's in its first Spring season in the container and it seems to be doing mostly really well. In an unusually warm Spring it has rapidly generated a lot of new, green growth on the top. As a novice gardener, I was very pleased!
But in the last few weeks, I've noticed that the lower leaves seem to be turning yellow, with brown spotted edges. I've picked off several leaves but the problem is spreading.
I'm worried that it's something serious. What is it, and is there anything that I can do before the whole plant gets affected?