Web Master:
It sounds like you plant maybe deficient of trace elements - but that may not mean that there just are not any in the soil, but that the plant cannot gain access to them. A good way to adjust this is to add compost to the soil, this acts as a tonic, encouraging the soil to release its load of elements. Then you can fertilise it (with a native formulation low in phosphorous) and the plant will be more able to draw them up. Native fertilisers generally contain plenty of nitrogen and that in itself is a good 'greener' of plants.