- Author: Ed Perry
Symptoms of Blossom-End Rot
The first symptom is usually the appearance of a small spot at or near the blossom scar of green fruits. As the spot enlarges, the affected tissues dry out and become light brown to dark brown. The area then develops into a well defined sunken spot, with the tissues collapsed and leathery. The spot can grow large enough to cover the entire bottom half of the fruit. The skin remains unbroken because it is the tissues beneath that have dried out and collapsed. The disorder not only affects tomatoes, but can also occur on peppers and squash. While the fruit looks unappetizing, you can still eat it - just cut out the affected part.
Causes of Blossom-End Rot
Tips for Preventing Blossom-End Rot
There are several things you can do to prevent the calcium deficiency, and blossom end rot. First, water deeply, and on a regular schedule, especially during hot weather. Use a soil-covering mulch around your plants to conserve moisture, especially if your soil is sandy. If you are growing tomatoes in containers filled with a porous potting soil, you may need to water the plants every day during hot periods. When cultivation is necessary, it should not be too near
the plants nor too deep, so that valuable water absorbing roots remain uninjured and viable. The best way of preventing the disorder is to maintain adequate and uniform soil moisture in the root zone throughout the growing season.
More Questions about Vegetables?
Stay tuned for an announcement about an upcoming in person class in August! In the meantime, fill out our Ask a Master Gardener survey http://ucanr.edu/ask/ucmgstanislaus and attach any applicable photos.
Ed Perry is the emeritus Environmental Horticultural Advisor for University of California Cooperative Extension (UCCE) in Stanislaus County where he worked for over 30 years./h3>/h3>/h3>/h3>/h3>