Hi there I planted a meyer lemon around 6 months ago and the older, lower leaves are producing mottled yellowing/also some leaves with the V-shape yellowing. This yellowing is slowly rising higher towards the younger leaves. The tree is producing fruit which is starting to ripen, and also flowering at the moment. So far I've added epsom salts a couple of times to the soil and watered that in, with no improvement. I then did a foliar spray of trace elements, but have not repeated this as the label advice is to not apply while flowering. Image attached. Any advice appreciated!