Please help, I planted a Lemon tree with Dad a few months ago as he lives overseas and may not be able to come back to Darwin due to age. The tree was doing well until this week, leaves yellow, curled and fallen off. I fed it with slow release citrus fertiliser last week. Really confused about how much water it needs, everyone says not to water too much but it looks like it needs water? New to this so would be very grateful for help.
I think your problem is water, too much. Lemon trees like really well drained soil. They are very susceptible to root fungal diseases and these occur when the soil is too wet and poorly drained. The best way to test soil for moisture content is to put your finger in the soil and feel it, if the soil feels damp dont water. Another thing with citrus is that they don't like other plants growing around the base of the tree.