Gardol Epsom salt is a magnesium fertilizer to prevent damage caused by magnesium deficiency symptoms such as needle browning on conifers and evergreens. The salt can also be used to ensure the magnesium supply of deciduous trees, bushes and other woody plants. The effect of Gardol Epsom salt can be accelerated by dissolving it in water, whereby the concentration of the solution should not exceed 5% (equivalent to 50 g/liter of water). In this case, application in overcast weather is advisable.