Here is the question: Does Epsom Salt STOP Tomato Blossom End Rot?
NO! Epsom Salts helps to promote or encourage Blossom End Rot.
Find Out WHY!
Epsom salt has been a favorite tool for a long time in the growers’ toolbox. Epsom salts have been touted as a secret cure-all for many plant ills.
Both professionals, master gardeners, and home growers use Epsom salts for:
In the case of tomatoes, adding Epsom salt does not stop blossom end rot but increases the potential for plants to experience the disease. Read on to learn WHY.
Most tomato growers are familiar with and experienced “blossom rot disease.”
Losses can be severe if steps are not taken to control its spread.
The disease is usually first seen when the fruit is ⅓ to ½ its full size. The disease appears as small water-soaked spots on the blossom end of the fruit.
As the fruit develops the “spot” grows and becomes dark.
The Tomato Blossom Rot Disease:
Blossom Rot disease is physiological and depends on several environmental conditions as fruit develops.
Now that you know What blossom rot is, how is the rot caused?
The disease is physiological, and the severity of the disease depends on several environmental conditions as fruit develops.
During the production of fruit tomato plants need calcium and water.
When plants grow rapidly and suddenly experience the lack of water or drought, the disease often shows up.
When cultivating occurs too close to plants, valuable water, and mineral absorbing roots are often destroyed.
The loss of roots reduces the plants’ ability to move the needed water and minerals to the fruit.
Tomato plants growing in poor soils without strong root systems or plants under stress are also suspect.
They too cannot move the needed nutrients and water the fruit requires.
Soils with high soluble salts reduce the availability of calcium to the plant.
If your tomatoes suffer from blossom rot will adding Epsom Salts to the soil, as a drench or a spray help stop, prevent or even control Blossom end rot?
The ANSWER is NO!
Epsom will not prevent blossom end rot on tomatoes, zucchini, peppers 2 etc.
It will promote or encourage it.
Many of us when planting peppers or tomatoes put a tablespoon of Epsom salts in the bottom of the hole when planting tomato seedlings.
We like the results of watching a healthy tomato plant grow, but when the plants get to the fruiting stage, the Epsom salts can increase the conditions for blossom-end rot.
Epsom salts contain magnesium sulfate – NOT Calcium.
Blossom rot is a calcium deficiency, not a magnesium deficiency!
The last sentence in the section above is vital to understand.
The Epsom salts (aka magnesium) in the soil the less calcium the plant can absorb.
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What Steps Can You Take To Reduce Blossom Rot?
NOTE: We like growing tomatoes in raised beds with soil designed for raised beds to maintain better control over the soil quality.
Below are some steps to help reduce blossom end rot.
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