The leaves of some houseplants naturally brown and shed as the plant ages. For other houseplants, the most common reasons why their leaves turn brown are excessive heat and insufficient water, light exposure or humidity. More » Science Biology Botany

Yellow coloring on vegetable leaves can indicate a wide range of problems, including too much water or too little water. Leaves can also turn yellow when the plant is not getting enough nitrogen. Other common causes of y... More »

Rosemary leaves can turn yellow because of cultural issues, whiteflies, botrytis blight and spider mites. Cultural issues are a common cause of yellowing rosemary leaves and occur when the plant's root system is too larg... More »

The longer night as summer turns into fall is responsible for the changing color of leaves in the autumn. As days grow shorter, the longer and cooler nights trigger biochemical changes in the leaves that turn them differ... More » Science Biology Botany

Leaves turn brown in autumn due to the deterioration of chlorophyll, the green pigment found in all leaves responsible for absorbing light for photosynthesis, explains the U.S. Forest Service. Intrinsically, the trees ar... More »

The leaves are the part of the plant that produces food. The process of producing food is called photosynthesis, which requires sunlight, water, chlorophyll, minerals and carbon dioxide. More »

Several plant species have heart-shaped, or cordate, leaves, including the aptly named String of Hearts plant and the Caladium. The String of Hearts is a succulent plant with long strands of fleshy, heart-shaped leaves. ... More » Science Biology Botany