yellowleaved

Yellowleaved is a descriptive term used in botany and horticulture to denote plants whose leaves are yellow. It can refer to natural genetic variation in which yellow pigment is produced as part of a species’ leaf phenotype, or to leaves that have turned yellow due to environmental or physiological factors. The term is commonly applied to ornamental plants with yellow leaf forms, as well as to wild species that display seasonal or age-related yellowing.

Causes of yellowing leaves are diverse. Genetic causes include variegation or cultivars bred to have yellow foliage with or without green margins. Acquired yellowing, or chlorosis, arises when leaves lack sufficient chlorophyll due to nutrient deficiencies (notably nitrogen, magnesium, or iron), soil conditions such as high pH that reduce iron availability, or root injury. Environmental stress (drought, waterlogging, or sudden temperature changes) and certain diseases or viruses can also produce a yellowing appearance. Distinctions between uniform yellowing and interveinal yellowing help diagnose the underlying cause.

Management focuses on restoring balanced nutrition and conditions. Check soil pH and fertility, adjust irrigation to avoid water stress, improve drainage, and inspect for pests or diseases. If yellowing is due to natural variegation, no remedy is required; otherwise, correcting the underlying factor usually restores green tissue in new growth.

Yellowleaved forms are used in landscape design for contrast and brightness but persistent yellowing can indicate compromised vigor and reduced photosynthetic capacity. See also chlorosis, variegation, and plant physiology.