Alkali

Also referred to as “base”. A chemical compound that neutralizes or effervesces with acids and turns litmus blue. At the chemical level, it is a molecule that can readily receive a proton or donate an electron pair in reactions. Alkalinity is measured by pH. A pH above 7 is alkaline. The higher the pH, the higher the alkalinity. Alkalis with higher pH’s can be hazardous. pH plays an important role in fig growth. Fig trees prefer soils which are alkaline. Acidic soils can stunt fig tree growth and may require amendments (often via garden lime or wood ash) to increase the alkalinity. Latex (fig sap) is alkaline and can be caustic, even burning the skin, especially when exposed to sunlight. Unripe figs can have an excess of latex, and produce a very distasteful flavor and even an unpleasant sensation on the tongue and lips. In contrast, see Acid.