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 foliage green.
Yellowing of 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 foliage and yields.
Below are some tips for using Epsom salt as a foliar:
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 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, 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.