Question
I have a Meyer lemon in a container (zone 5).  I have been spraying the foliage with a Epsom salt/water solution about twice a month since May.  I am not sure it has helped, but the tree has three large lemons and numerous flowers.  I am most excited since it is only a three foot tree.

I do not remember where I read about using Epsom salt as a folar feeder, and did not write down the ratio of salt to water.  Do you have any suggestions for a "recipe"?  Thank you.

Answer
Hello Sheryl,

Epsom salts (magnesium sulfate) supplies magnesium which is vital micronutrient. It is called a mirconutrient because it is needed in lesser quantities than macronutrients like nitrogen, potassium and phosphorous, however it is no less critical to plant growth. Magnesium acts as carrier of chlorophyll and so it helps to keep the leaves green and healthy.  

There are many recipes for the application of epsom salts, a common one is 1 tablespoon per gallon of water or 1.5 teaspoons per half gallon.

I will caution you that although magnesium is an important nutrient it is not the only one and excessive application of magnesium can lead to magnesium toxicity. You should be applying a balanced fertilizer like a 15-30-15 or similar. Most balanced fertilizers contain magnesium (read the label)as well as other micronutrients which makes the application of epsom salts unnecessary, although an occasional epsom salts drink generally does no harm.

I hope this information was of help to you.


Vito Nettis