Apple tree leaf problems
I bought this cox orange pippin at the start of summer, potted it up with john innes no. 3 mix, and have also added in some vitax q4 pellets and occasionally q4 liquid feed, I keep it regularly watered too. The tree is not looking too happy at the moment, the top has some aphids but all the leaves are looking unhappy, some are yellow and some are speckled. Please help!