Some citrus fruits are grown, and other subtropical fruits are grown in the south. The nearly level coastal plain is mantled by sand of varying thickness over limestone. The many swamps, marshes, lakes, and streams are prominent landscape features. Most of the area is flat, but some hummocks rise a meter above the general level. Average annual precipitation -1,300 to 1,525 mm.
Maximum precipitation is in summer, and the minimum is late in autumn and in winter.
Rainfall, surface water, and ground water provide an abundance of water. On much of the cropland, ground-water levels are controlled by canals and ditches. Excess water is pumped out during the rainy season, and irrigation water is applied during the growing season. Domestic and municipal water supplies are obtained mainly from wells in the underlying limestone. Water from this source is highly mineralized.