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www.reference.com/article/causes-yellowing-leaves-ae5e5d9b4c8f39b4

Yellowing of leaves can be caused by normal aging, lack of sunlight, overwatering, nutrient deficiency, color drafts and viral infection, according to About.com. When plants age, it is normal for their leaves to turn yellow and eventually drop off.

www.reference.com/article/leaves-turn-yellow-f90751df16b5543

Leaves turn yellow because of lack of water and insects. Chlorosis, root issues, lack of nutrients and lack of sunlight are also culprits that cause yellow leaves.

www.reference.com/article/leaves-start-turning-yellow-717fb730cb1baa79

Leaves start to turn yellow when a plant either receives too much or too little water. Pest infestation, nutrient deficiency or high PH in the soil can also cause leaves to yellow. In some cases, leaves turn yellow owing to chlorosis, a condition where leaves are devoid of chlorophyll.

www.reference.com/article/plant-leaves-turn-yellow-c788071ebb9fb1c9

Plant leaves may turn yellow for a number of reasons, such as nutrient deficiencies, pests, insufficient water or a lack of sunlight. A plant's leaves may also turn yellow as part of the normal growth process.

www.reference.com/article/reasons-plant-leaves-turn-yellow-da382e106fa5c435

Plant leaves turn yellow for a variety of reasons, including a lack of chlorophyll caused by too much or too little water, insufficient sunlight, temperature changes and disease. Plants contain various pigments such as chlorophyll, which produces a green color, and carotene, which produces a yellow

www.reference.com/world-view/vegetable-leaves-turning-yellow-dcebcbbddac166be

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 yellowing plant leaves include extreme temperatures, leaf damage, root damage, di

www.reference.com/article/rose-leaves-turn-yellow-26019fe465145293

Rose bush leaves can turn yellow when there is an issue with light, water, pests, disease, fertilizer or heat stress, according to Gardening Know How. After yellowing, the bush may lose the leaves entirely.

www.reference.com/article/tomato-leaves-turning-yellow-fe9342cc60a99524

According to Gardening Know How and Home Guides, tomato leaves turn yellow for many reasons, including: a lack of nitrogen in the soil, lack of water, pest problems or magnesium deficiency. Minor yellowing during the growing season or on the lower parts of the plant is normal ? it does not call for

www.reference.com/article/yellow-pigment-leaves-called-56e8bdf2a4931fa8

Carotenoid is an organic pigment that is found in leaves. Depending on the concentration of this pigment, leaves can be red, orange or yellow.

www.reference.com/article/causes-yellow-hands-580359ab17a08505

Some causes for yellow hands can be medical conditions such as jaundice and hypercarotenemia. Jaundice is a condition in which the skin turns yellow due to an increase of bilirubin in the body, states the National Institutes of Health's MedlinePlus. Hypercarotenemia is the result of a diet that cont