The availability of soil Zn applied from 7 different sources was tested by growing orange seedlings in pots of typical sandy Florida citrus soil with and without liming. The sources were ZnSO4, ZnO, ZnCO3, metallic Zn powder, glass—fritted Zn, ZnS, and Zn Tracin. The latter is a commercial Zn complex from a wood industry byproduct. Zn was mixed in the soil before planting, at the rates of 25, 50, and 100 ppm. The plants were cut back to force rapid new growth 4 times over a 3‐yr period. Leaf Zn was determined. All sources and rates were satisfactory for good growth, and the sources were approximately equal after 3 yr. Differences in sources were more noticeable during the first 9 mo and on the highest rate of Zn. Liming tended to equalize all sources and rates, and the availability of Zn increased with time on the limed soil.