My lemon tree has gone yellow and the abundance of fruit on it also tuned yellow too soon and they are very small. What might of caused this?

Hi Ross

Your lemon tree leaves going yellow can indicate that they have too little water. Usually this is followed by them falling off the plant and starting to shrivel. Too much water triggers the plants to defoliate as well, however the leaves do not normally fade in colour. The soil should be moist but not water logged. Lemons can go for long periods without water. 

Magnesium deficiencies can be common in citrus, which is also shown by yellowing leaves. Apply Tui Epsom Salts around the drip line of the lemon tree (where the leaves extend to). You should feed your lemon tree in spring and summer with Tui NovaTec Premium fertiliser.

Thanks, Tui Team.