> Is that true mostly for chiles or do other plants > (like tomato) benefit from planing in soil that is > less cool? All plants (and animals) have preferred temperature ranges, and this applies to roots as well as leaves and stems and skin. Members of Solanaceae are mostly from warm climates and prefer warm soil, and this is true for chiles and at least as much so for tomatoes. Beans, corn (maize), and squashes are other typical garden plants that like/need warm soil. But many others, including Brassicas (cabbage, brussels sprouts, etc.), spinach, and lettuce like much cooler soil, and thrive in winter in San Francisco bay area. Potatoes are in Solanaceae, but as I recall they like much cooler temperatures than tomatoes or chiles. --- Brent