Rose in 5-1-1 soilmix -not doing well
I bought 'first prize' rose looking at its massive blooms at a nursery. I potted it in 5-1-1 mix, I see lot of new growth but I can see something is not right with the plant as the leaves are coming pale green and becoming yellow and fall off. This is with new growth. I cannot think of what is missing that is causing this issue. What can I do to rectify the problem. pics of the plant attached.