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How to identify deficiencies in container plants
Check for poorly defined green shoots, yellowing older leaves and premature leaf drop.
If these are present, this indicates that the pot plant has magnesium deficiency. Remedy by spraying a mixture of water and some dissolved epsom salts to the soil and on the plant's leaves.

OPTIONS: -- Soak the leaves in the mixture, pressing them through a damp cloth to remove as much of the magnesium oxide as possible. Search for bags with lack of moisture. -- Check for leaf drop if water seeps through only 1 third or less of the stalk and leaves. If the leaf drop is not visible near the top of the stem, however, the foliage does not look fully developed. -- Try to spray under the leaves for better absorption. Look for spindly growth and dropping leaves that turn red or purple. -- This type of contamination will warrant a special fertilizer. Try planting the plant in a garden that receives direct sunlight.
Try to spray under the leaves for better absorption. Look for spindly growth and dropping leaves that turn red or purple.