There are soils which are deficient in magnesium. Testing of magnesium levels is simple and can be done by carrying out a simple soil test. Most of these soils are old and weathered and have low PH or PH above 7.
The magnesium levels have been used to up in the soil, which is important for keeping a green or dark green foliage.
Yellowing of formerly green leaves is very common in many plants, whether potted in the lawn, or the garden. Many people don’t know that the yellowing is brought about by the lack of magnesium.
Magnesium in the Epsom salt plays a very crucial role in photosynthesis which is used by the plants to convert sunlight into food. The photosynthesis process creates chlorophyll which is the pigment that gives green plants and algae their color.
Magnesium is also believed to bring more flowers and fruit thus creating more green or dark green leaves and increasing yields on crops of tomatoes.
Epsom salt is mostly applied as foliar feeding spray when growing roses, tomato production, peppers and many other flowering tree or plants. One reason for Epsom salts common use in the garden is because of its foliage greening properties.
Below are some tips for using Epsom salt foliar spray:
1. Spraying the foliage with a solution of 1 gallon of water mixed with one tablespoon of Epsom salt. Application of this solution is expected to be done during late spring whenever new leaves are almost opening.
2. Use one gallon of this solution for every 12 inches of plant height.
3. Spray the plants on days that are overcast. During sunny days of summer, spraying is preferably done in the morning or late in the evening.
4. Re-spray the plants with one tablespoon of Epsom salt and one gallon of water whenever the plants start flowering.
Commercially, we have long used Epsom salts at the above rate for greening up potted palms by spraying the foliage and drenching the soil.