The HGP Staff have been fielding lots of questions about Salt Damage.
Below is an excerpt from the website “Lawn Care Academy” High Soil Salinity Problems and How to Correct Them

The salt damage from of the Tsunami can easily be seen on the turf by the harbor in Kahului Maui along Kaahumanu Ave. across from Whole Foods Market.
How Gypsum Works
The Calcium (Ca) in gypsum replaces the salt while the sulfate in gypsum reacts with the sodium forming sodium sulfate. Sodium sulfate is a highly water-soluble material that is easily leached below the root zone. This process also repairs soil structure so soil particles can bind with each other again. For severe cases the process may take several seasons.
The amount of gypsum applied will be determined by a soil test. Test results will often indicate applications of 1 ton to 10 tons per acre. On average, for moderate to severe damage, gypsum can be applied as much as 50 lbs per 1000 sq.ft. Gypsum doesn’t work well as a preventitive before damage occurs because the elements break down.”
Hawaii Grower Products Carries Fairway grade pelletized gypsum (calcium sulfate) by the 50 pound bag or by the ton and also Greens grade pelletized gypsum (calcium sulfate) by the 50 pound bag or by the ton
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Aqueduct is designed to provide rapid recovery from existing water management problems such as localized dry spots.
Aqueduct moves water deeply into problem areas, reducing water repellency and restoring the soil’s ability to regain optimum moisture levels. It can also be used as a pretreatment tool to correct problem areas before starting a regular preventative program. Use Aqueduct to:
Continue reading ‘Is the heat and dry of Summer hurting your plants?’
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