Repeat every two weeks during the growing season. Place your collected eggshells in a blender and blend until you have a dry powder. Calcium nitrate spray for tomatoes is applied at a rate of 1.59 kg. University of California Cooperative Extension, Placer and Nevada Counties: Managing Blossom-End Rot in Tomatoes and Peppers. An example of this is high-calcium limestone, applied to correct the soil pH at least two months prior to planting. What Is the Amount of Calcium to Add to Tomato Plants? Tomato plants require a balanced dose of nitrogen, phosphorus and calcium, but over-fertilizing and poor soil quality can cause imbalances. Plant your tomatoes as you normally would. Good garden soil should have a pH between 6.5-7.2. Water your tomato plants with it. If you forget to add the lime in fall, then add it in early spring, at least two months before you plant your tomatoes in the garden. For instance, it loosens soil to allow it to absorb more water, and it increases the strength of a plant's cells. The plants need at least 1 1/2 inches of water per week during the period when they are most vulnerable to calcium deficiency, which is from the time they begin to set fruits until the time those fruits are at least one-half their mature size. Eggshells contain such an abundance of calcium that they can be used almost like lime, though you would need a lot of eggshells to make a measurable impact. Sprinkle the powder around the tomato plant. Mix that fertilizer with the top 8 inches of soil - along with the lime - just before you put the plants in the ground. All Rights Reserved. 7. Then add calcium to prevent blossom end rot: a dozen crushed eggshells, a dozen crushed calcium carbonate tablets or a half- cup of a calcium-rich organic plant … It was going to be a beautiful tomato, that eagerly anticipated first of the year. Wait until your tomato plants begin to grow. If it is too acidic, adding calcium can help restore the balance. Also, when plants grow rapidly early in the season, they tend to channel most of the available calcium into their foliage rather than their fruits. A lack of calcium in the soil and in your plants can cause the growing tip to become pale and die or may lead to blossom end rot in your tomatoes. How Often Should You Add Calcium to Zucchini Plants? Step 2. The first thing you should do … Add Epsom salts to restore the calcium in the soil for your plants. Step 3. If you didn’t add lime in fall or early spring, then do so just before you plant the tomatoes, though the lime won't be as effective as it would have been if given more time to incorporate into the soil. If your tomatoes have already developed blossom-end rot, you can provide more balanced nutrition using a foliar spray of calcium nitrate mixed with water. per 100 feet of tomato plants or 340 grams per plant by tomato producers. Place your collected eggshells in a blender and blend until you have a dry powder. Commercial calcium sprays are available, but for an economical alternative, consider a milk spray. Soil that is not already rich in calcium will allow disease such as blossom end rot to infect your tomato plants. Bodine is passionate about gardening, travel, education and finance. If your soil's pH level is lower than that range, which means it is more acidic, then add garden lime, also known as calcium carbonate, to your vegetable bed's soil in fall. My tomato plants were … These help prevent or correct low calcium levels in tomato plants. Plan the perfect garden with our interactive tool →, Colorado State University: Improve Your Garden Soil This Fall, University of California Statewide Integrated Pest Management Program: Blossom End Rot, UC Davis Good Life Garden: Tomato Troubles, University of California Agriculture & Natural Resources: Growing Tomatoes in the Home Garden, North Carolina Cooperative Extension Service: Blossom-End Rot of Tomatoes in the Home Garden, Journal of Horticulture and Forestry: Uptake of Calcium Nitrate by Tomatoes, University of California Agriculture & Natural Resources: Fresh Market Tomato Production in California, University of Missouri Extension: Growing Home Garden Tomatoes. Sources of Calcium to Prevent Tomato Blossom Rot. Dig or till the lime into the top 1 foot of soil. Use soil additives to enhance its calcium content. Does Epsom Salt Water Keep Tomatoes From Rotting on the Vines? Most soils that have been cultivated for some time have enough calcium to meet the needs of plants. Adding Calcium Early. Late in the season use an Epsom salt spray to increase tomato and pepper yield and keep plants green and bushy; early in the season add Epsom salt to the soil to aid germination, early root and cell development, photosynthesis, plant growth, and to prevent blossom-end rot.