There are three reasons the leaves of a hydrangea plant would turn yellow: water issues, nitrogen deficiency and iron chlorosis. Water issues are the easiest to fix, but it is still possible to restore the leaves from the other two conditions as well.
Although hydrangeas do require a lot of water, it is still possible to overwater the plant. If the leaves start turning yellow, cut back on the watering to improve the condition. Nitrogen deficiency of a hydrangea is usually expressed by established leaves turning yellow, and it happens when the pH balance of the soil is too high. Add fertilizer with nitrogen, but not phosphorus, to fix the issue. Iron chlorosis occurs in new leaves because the level of iron in the soil is too low. To correct the deficiency, add iron supplements to the soil.Learn More
Yellowing leaves can be the result of insufficient sunlight, underwatering the plant, a lack of nitrogen or magnesium in the soil, or a disease. Tomato leaves may turn yellow for a variety of reasons, and a few yellow leaves are nothing to be overly concerned about.Full Answer >
Hostas are ornamental garden plants that can fall victim to a number of pests, infections and diseases, and holes in the plant's leaves are most commonly the result of insect infestation, including slugs and snails. Because slugs are nocturnal, gardeners who find holes in their hostas' leaves may not have any other evidence that slugs are to blame since these insects tend to hide during the day. However, holes are a good indication that insects are to blame as other pests, such as rabbits and deer, tend to focus on the plant's shoots or simply strip leaves bare, and diseases tend to result in brown patches or white cottony patches.Full Answer >
Curled or rolled leaves on a tomato plant can be a sign of physiological problems, herbicide damage or viral infections, according to the University of Clemson Cooperative Extension. The possible physiological reasons include transplant shock, change in temperature at night, drought, severe pruning and root damage.Full Answer >
Vertlicillium wilt causes the leaves of weeping cherry trees to turn brown and wilt, according to Garden Guides. The disease is caused by a fungal infection. The leaves of an afflicted tree will have veins that turn red from vascular damage, curl, droop or wilt, turn yellow and then brown before dropping from the tree. Verticillium wilt first attacks the roots and then the wood of the tree.Full Answer >