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why do my tomatoes rot on the bottom

When you have plenty of tomatoes on your plants, but some of them look like they are rotting on the vine, your tomatoes are suffering fromВblossom end rot. The first sign is a brown discoloration near the bottom end of the fruit. These spots grow and darken until they cover up to half of the tomato, and the rotting fruit becomes vulnerable to secondary bacteria and fungi. The affected tomatoes can t be saved, but the plant can. Blossom end rot is the result of calcium deficiency. However, that doesn t necessarily mean that you need to add calcium to your soil. Blossom end rot is most often caused by watering practicesвyour own or Mother Nature s. In a typical situation, the soil is allowed to dry out completely, and then the gardener over-compensates by watering heavily when the plant starts to wilt. The plant bounces back, but the damage has been done to fruit in an early state of development. During the dry conditions, the plant was unable to absorb sufficient calcium from the soil through its roots.

When fruit develops, it shows the telltale rot at the blossom end. Another less common situation occurs when plants are given too much water. If you have a cool, wet spring and summer in your parts of the country, the plants take up so much moisture that the amount of available calcium is diluted, and the result is blossom end rot. If the problem is caused by too much moisture, side-dress the plants with bone meal to replenish the soil s supply of calcium. A few brands of organic blossom end rot spray are on the market. These are calcium sprays that you spray on the foliage every week or so. This doesn t save any fruit that already shows rot, but it may prevent rot on future fruit. Test your soil in the fall or early spring for calcium. If it is calcium deficient, as determined by a
В kit purchased at your local garden center, add ground limestone before setting out the tomato plants.

A half pound of ground limestone per 10 square feet of soil raises the soil pH by about one point. If you can t locate a soil test kit that measures calcium content, contact your local cooperative extension service to learn how to collect a soil sample and send it to the lab for analysis. The report you receive alerts you to any mineral deficienciesВ in your soilвincluding calciumвas well as steps to correct the problems. After you, mulch the soil around the plants with sawdust, or grass clippings to prevent the loss of moisture. If you have tomatoes with blossom end rot on your plants, remove the damaged tomatoesвthey ll keep growing and use the plant s energy, which is better put to use producing new rot-free fruit. What is Blossom End Rot? If your tomatoes look black on the bottoms, they re probably suffering from blossom end rot. Blossom end rot can be identified by a black or dark discoloration, usually with a water-soaked appearance.

It can also appear on peppers and eggplant. The good news is that it s not a disease, but rather the result of a calcium deficiency when the fruit was forming. Particularly in container gardening, the calcium deficiency that causes blossom end rot is often caused by inconsistent watering. If the soil gets too dry, the plant isn t getting the calcium it needs in order to produce healthy fruit. If the plant gets too much moisture, the same thing can happen. Blossom end rot can also be the result of over-fertilization during early fruiting. Blossom end rot sometimes occurs inP which have very consistent supplies of water and just the right amount of and dolomite, which should provide all the calcium the plants need. In an Earthbox, blossom end rot might be the result of unusually rapid growththe plant can t take in enough calcium quickly enough. The good news is that if you growing indeterminate tomatoes (that set fruit all season) and you have a few tomatoes with blossom end rot, it doesn t mean that all your tomatoes will be affected.

Even without treatment, some of your later season tomatoes may be fine. P Don t plant tomatoes in cold soil, Don t over-fertilize, especially with high nitrogen fertilizer, Don t under-fertilize. Tomatoes are heavy feeders and potting soil, unless it is pre-fertilized, doesn t provide the nutrients tomatoes need. Use high-quality potting soil that drains well. Don t let your tomato plants dry out. Keep the soil moist, not wet Add dolomite or lime to potting soil when planting. Some people say that adding crushed egg shells and watering with diluted milk or yogurt can add calcium and prevent blossom end rot. If you experience blossom end rot in aP, mix 1/4 cup of lime with one gallon of water and pour it into the reservoir. Only do this once. This should fix the problem.

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