I've got a lemon tree which grows near an apple tree in a garden, which used to be organic 5 years ago. We'd like to keep it organic. The tree has tiny tiny little lemon buds on it and very very very yellow leaves. What can I do to make my tree happy? Will post pictures. All help much appreciated as I know NOTHING about lemon trees. -Ida P.s. tree's growing in full sun in Taranaki, nz.