Blossom End Rot on Tomatoes
What’s with the name?
A common issue, when growing your own tomatoes in Florida, is blossom end rot (BER). The blossom end of the tomato is opposite of where the stem is connected to the fruit and where blossom was once attached. This is where blossom end rot developes. This end of the tomato, at some point in its development, starts to become discolored and finally rots. Unfortunately, blossom end rot often happens to your tomato within weeks or even days of the harvest. Peppers, squash, cucmbers and melons can also suffer from BER.
Why are they rotting?
The culprit is calcium deficiency. Because the fruit is deficient in calcium, it weakens the cells within the fruit, which is followed by secondary fungus or bacterial rot. To little available calcium in the soil, over fertilization with nitrogen and not keeping the plant evenly watered are common reasons for this condition.
Is there a solution?
First you want to make sure your plant has plenty of available calcium. This needs to happen throughout the growth of the plant not when you see a problem. Once the problem has manifested itself, fixing this condition with soil or even foliar calcium applications is generally not effective. There are some products for homeowners that contain liquid forms of calcium that can be sprayed regularly on your plants. The condition is easier to prevent than to cure. If your problem comes in April you won’t be able to correct it before the tomato season ends in the middle of May. By then, night temperatures above 70 degress hamper pollination, warm daytime temperatures cause excessive growth and insects and disease become unmanageable.
Watering plays a crucial role
It’s important that watering is kept at an even level. Altermating wet and dry irrigation aplications and letting plants dry out by the evening make them very susceptible to BER. Over fertilization can cause excessive growth and a redirection of water resources to the leaves and away from the fruit. When water doesnt make it to the fruit, the calcium it carries also fails to make it there. Paying attention to these cultural practices should help you avoid BER.
Learning Florida’s Lessons
Learn more about growing vegetables in Florida at my fall vegetable gardening workshop August 8th at the Bert J Harris Agricultural Civic Center’s Sam Polston Auditorium. You’ll receive a 100 page booklet and take part in our seed exchange. We provide the seeds. Learn more on Eventbrite or for more information call the UF/IFAS Extension office of Highlands County at 863 402-6540 or email me at firstname.lastname@example.org. That’s the news from the Hometown Gardener. You can find and “Like” my page on Facebook at Hometown Gardener.
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