Greenbackyard

This is a photo of the leaves on our cumquat tree here in Sydney. It has thrived in a large stone pot for many years, but now the leaves are going this mottled yellow colour - green in the veins, bright yellow all around the leaves. Last year we got a bumper crop of cumquats - I made a delicious jam from them, and I’d like to think I could do so again this year. So taking care of this great little tree is important to me. I put in some citrus fertilizer earlier this season (Spring in Australia) so thats a good start. I’ve heard that these symptoms could mean a lack of magnesium, or a lack of zinc, so I’m going to head over to two of my favourite forums and ask them for some advice.