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Rose bush leaves can turn yellow due to lack of water, spider mites or fungal diseases, such as blackspot and rust. Other symptoms are necessary to identify the exact cause of the yellowing. More »

www.reference.com Home & Garden Gardening & Landscapes

Leaves of plants typically turn yellow for a variety of reasons, which may include nutritional deficiencies, poor drainage, compacted or damaged roots, overwatering, insufficient light and viral infections. In addition, ... More »

www.reference.com Science Earth Science

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... More »

www.reference.com Science Biology Botany
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Rose bush leaves turn yellow for several reasons; mainly those to do with too much heat. Too much shade or excessive fertilizing are other reasons rose bush leaves turn yellow. More »

www.reference.com Home & Garden Gardening & Landscapes

Yellow leaves on petunias are caused by a deficiency in nutrients, fungal diseases, viral diseases and aphids, which are also known as plant lice. If caught early, the damaged parts of the plants can be removed and disca... More »

www.reference.com Science Biology Botany

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 »

To prune roses, use a pair of high-quality pruning sheers to cut each stem at a 45-degree angle (away from new growth) to remove dead or damaged leaves, blossoms and stems (canes), keeping the center of the plant as "ope... More »

www.reference.com Home & Garden Gardening & Landscapes Trees & Bushes