How do you make a calcium-rich foliar spray to spray on a zucchini plant? My zucchini plant is beautiful and healthy, but my zucchini gets about 4-5 inches long then develops blossom end rot. We try to keep it watered evenly and have watered with water that has had eggshells soaking in it. But we still haven't been able to harvest any zucchini.
Make a Calcium-Rich Foliar Spray
Certified GKH Gardening Expert
Try spraying them with chamomile tea. This helps add some calcium to the plants. People also have luck using epsom salt spray (https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/epsom-salt-gardening.htm), which adds magnesium which helps the plant use all of its other nutrients, like calcium, more efficiently.