Citrus family likes loose, fertile, middle depth and acidic soil. Citrus roots are close to the surface, they only grow about 60 to 65 centimeters of depth in earth. It is possible to grow Citrus trees in swallow soil if the fertilizing and watering is done with extreme care.
If the soil contains too much clay for water to flow easily, the need for irrigation and fertilizing is much greater. The top of the soil should be loose and easy to work on ( loam is perfect for this ) while the bottom should have enough clay to hold the water. Places where the groundwater is less than 1 metre below the surface is ideal for Citrus production.