Originally Published by Sandra Mason 08/28/2007 According to plants, green is "in". Gardeners, however, add plants known for everything but green. In the gardening world purple or yellow colored leaves are "in". Sometimes a change in leaf color can be an indication of nutrient or environmental problems. If your green plants are now yellow, chlorosis may be the issue with the tissue. Abnormal yellowing of leaf tissue is called chlorosis. Leaves lack the essential green pigment...