Why would the bottom of my tomatoes turn black and how to I make it stop?

Question

They're being homegrown

Answer 1

Blossom end rot is a really problem caused by not only too much water, but uneven watering, followed by calcium leaching from the plant. In our area, the problem is most common in plum type tomatoes like Roma. Controls include mulching under tomato vines to help the soil retain moisture, a deep watering/dry days cycle and possibly using a calcium supplement in the soil at planting. Many folks here use Epsom Salts. Some use finely crushed eggshells. There are also some varieties of tomato which seem less susceptible to BER. Comparing Roma to another Italian plum tomato last year, my parents found the San Marzano to be more productive of larger fruits and free of BER. My garden has experienced some end rot already this year, but only with Romas.

Answer 2

This is one answer to your question, that another person has asked:

"My Tomatoes turn Black on the Bottom!"

Richard at Bolling Air Force Base writes that this is his first time planting tomatoes in our area; and since he's on a base and can't dig a real garden he has to use containers ("Earthboxes" to be exact).Last year he says he had prolific yields using the boxes in Texas, but every fruit had blossom end rot.He says he bought some "rot-stop liquid" but is not sure it's organic after looking at the label.Well, good for you for looking, Rich!

Blossom end rot—where the bottom of the fruits turn black—is caused by over-watering; a real problem in those boxes. But if tomatoes get lots of calcium, they can regulate their water use so well it prevents any rot. I give my tomatoes calcium by putting the crushed shells of a dozen eggs in each planting hole.

You mentioned that yours are already planted, you season-rusher you—so dissolve some calcium supplements in water and give it to the plants that way.

Answer 3

your not getting the water deep down what i do is use a coffee can i dig a hole next to each plant cut both sides of the large can and push it down in the ground and just make sure you fill it with water every day and try not to wet the plants late at night use mulch around the plants you should get real nice tomatoes i have been growing them for over 20 yrs hope this will help a good gardener(smile)

Answer 4

I had that last year, as a result of too much rain, NOT immediately followed by warm sunshine. Water stays on the bottom of the fruit, and allows a fungus to grow rapidly.

Answer 5

It's a fungis, and overwatering can cause it to grow. Ask someone at your local plant nursury for ways to prevent the fungis.

Answer 6

try this yahoo group tomatomessenger they will answer all tomatoes questions very good - they also have a web-site on
http://www.gardenmessenger.net/

Answer 7

did you leave them in a plastic bag? when you come home from the supermarket put them on the counter

Answer 8

Too much water.