95☏ to 50☏ (optimal 75☏ to 60☏): corn, cowpea, New Zealand spinach.95☏ to 65☏ (optimal 85☏ to 70☏): eggplant, hot peppers, okra, sweet potato, watermelon.The strong sun is an important consideration when choosing crops for your Arizona garden. They are even more extreme in the summer. Optimal vegetable-growing temperature ranges, with the high end of the range given first: One generalization is true: When you are growing vegetables in hot southern Arizona or chilly northern Arizona, the sun’s rays are intense. Feeding and fertilizing should be decreased or stopped during very warm and hot weather.Įxpect loss of blossoms or crops when temperatures deviate from a crop’s temperature range. Most plant cells are killed at temperatures from 122☏ to 140☏.Īdequate water and shade can help reduce blossom drop and cell damage when temperatures are very warm or hot. 90F to 60F (optimal 75F to 65F): cucumber, muskmelon. 95F to 50F (optimal 75F to 60F): corn, cowpea, New Zealand spinach. If temperatures go too high, plant’s can suffer sunburn and sunscald and plant cells can experience chemical alterations, membrane damage, dehydration, and death. Optimal vegetable-growing temperature ranges, with the high end of the range given first: 95F to 65F (optimal 85F to 70F): eggplant, hot peppers, okra, sweet potato, watermelon. When temperatures rise above a plant’s temperature range the plant will go dormant–that is quit growing (the same is true when temperatures fall below the range). Carrots can be successfully grown alongside a number of different plants, but some are better pairings than others. Tomato flowers may drop if the temperature rises above 90☏ during the day or 75☏ at night. The tops of the carrot roots will be about 3/4 to 1 inch in diameter and likely starting to pop out of the soil, though not necessarily. The optimal temperature range for peppers and eggplants, for example, is 70° to 85☏ pollination will not occur if the night temperature falls below 55☏, and blossoms may fall if the temperature rises above 85☏.īean blossoms may drop off if temperatures remain warmer than 85☏ for more than a day or two. Moreover,how can you tell when carrots are ready to harvest Carrots should be ready for harvest about 60-80 days after sowing seeds, depending on the variety. Vegetables are sensitive to hot temperatures–just as they are sensitive to cold temperatures.Įach vegetable crop grows best in its own range of temperatures.
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