The University of Florida's Soil Testing Laboratory for organic soils has been using a water‐extracable P soil test since 1944. This test was selected because of its reliable correlation with response of vegetable‐crop commodities produced on Histosols. However, this soil test has not consistently provided reliable correlations for agronomic crops which have a longer growing season. In the interest of calibrating an extractant for both horticultural and agronomic crops, and possibly accomplish progress toward the use of a more universal extractant for all Florida soils, data from four field experiments were used to evaluate several extractants as alternatives to the water P test currently used. Lettuce (Lactuca sativa L.) was used as the test crop and the extractants evaluated were, the sodium bicarbonate, ammonium bicarbonate‐DPTA, EDTA, Mehlich‐I, and Mehlich‐III soil test. Overall, no extractant provided superior correlations to lettuce response than the water P test. However, the M‐III extractant produced correlations that were similar to water and further evaluation of this extractant as a P soil test for Histosols is warranted.