Solutions: The easiest (and most obvious) way to address underwatering is to fully hydrate the plant. However, this must be done carefully. A common mistake that many gardeners make is to douse their underwatered plants with water. This can overwhelm the roots of the plant and shock its system, something that can be even more damaging than the lack of water to begin with. Instead, water thoroughly and slowly, taking breaks to let the water slowly saturate through the soil to get to the roots. Use room temperature water, as cold water might be too much of a shock. In the future, shorten the time between waterings. A good rule of thumb is to check the soil around each plant daily. If it’s dry to at least two inches down, it’s time to water. If a container plant is repeatedly drying out very quickly, repotting into a slower-draining container might be a good idea, too.

Solutions: There are several easy ways to remedy the nutrient deficiencies in soils. Use a water-soluble fertilizer. Fertilizers will include most or all of the macro and micro-nutrients the plants need to thrive. Adding some fertilizer to the soil will make those nutrients available and can combat deficiencies. Regularly apply organic fertilizer pellets. Organic fertilizers such as animal manures and bonemeal can supply plants with all the nutrients that they need to grow strong and healthy. Apply compost. Though not as finely tuned as artificial fertilizer, compost can nevertheless be rich in important nutrients and should be applied to the soil regularly. Apply nutrients via foliar application. In addition to supplementing the soil with nutrients, foliar fertilizer can be applied directly to the plant's leaves. Nutrients offered via foliar application are often taken up even quicker than those put in the soil, so the foliar application can be great for swiftly addressing specific deficiencies.

Solutions: It is not effective to just treat trees with symptoms of leaf curl once at the beginning of the season, when the buds are still protecting the spores. The disease will instead need to be managed during the entire season as much as possible, and treated again in the fall. During the growing season, the following methods should be applied to any type of leaf curl, which is increased by cool weather and rain irregularity: Spray a copper-based fungicide in late winter before buds begin to swell. Thin and prune fruit more than normal as it develops, to help cut back on the spread of the fungus. Irrigate as necessary during drier weather to keep watering consistent and prevent further stress on the tree. Don’t panic if your tree loses many infected leaves. Trees will re-foliate and normally the new leaves are not infected. Apply a copper-based fungicide in late fall to help gain control of the disease and reduce further spread of the fungus in the spring. For more effective treatment of leaf curl at the end of the season, see the Prevention section below.