![]() ![]() Water drainage is the most important soil factor to consider. Soil fertility and pH are not important considerations because they can be amended as recommended on soil test results. Soil Considerations. Apples grow well in a wide range of soils, but the best fruit quality is produced on moderately fertile soils. Covering the trees with a tent or a piece of plastic will prevent frost injury only when there is a source of heat, such as a kerosene heater, inside the covering.ī.When freezing temperatures persist for long periods, the buildup of ice can cause tree breakage. Water should be turned on when the temperature reaches 33☏ and sprinkling should continue until after sunrise when the ice has melted from the trees. Windy conditions, especially when accompanied by low dew points, can cause the water to evaporate and may increase injury. This method is effective only on nights that are clear and calm. Ice itself does not insulate or protect plants. Sprinkling the trees with water releases heat as the water freezes and may prevent bud freezing.Planting trees close to water may reduce the likelihood of frost injury because the cool water cools the air and delays bloom. Large bodies of water, such as lakes and large rivers, hold heat and warm the air and may protect crops during fall and early winter.Sometimes a 10-foot increase in elevation makes the difference between a good crop and no crop. The most effective way to minimize frost injury is to avoid planting in low-lying areas.Cold air is heavier that warm air and flows into low areas much as water flows into low areas. In general, high areas such as hill tops or hill sides, that are surrounded by lower ground, have the least frost damage. Covering trees with various materials is of little benefit. ![]() Air temperatures below 28☏ during bloom may kill flowers and eliminate the crop. Cold Air Drainage - The most important factor contributing to annual cropping is the avoidance of frost during bloom. ![]()
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