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More aluminum sulfate than this at any one time can result in aluminum toxicity, which can kill your plants. Do not apply aluminum sulfate in quantities greater than 5 pounds for every 100 square feet of garden area to avoid aluminum toxicity and injury to plants.
Accordingly, how do you add aluminum to soil?
Work the aluminum sulfate into the soil with a shovel and then water the soil thoroughly until it is evenly moist to activate the product. The aluminum in the soil raises the acidity instantly, while the sulfur breaks down more slowly, depending on the soil temperature and the bacteria in the soil.
Additionally, is aluminum sulfate a fertilizer?
In acidic soils -- pH 5.0 to 5.5 -- aluminum becomes available. Aluminum sulfate adds aluminum, but more significantly, it lowers pH. Blue, pink or whatever color your soil produces -- the choice is yours. The addition of an all-purpose fertilizer twice a year keeps your hydrangea well fed.
Aluminium sulfate is used in water purification and as a mordant in dyeing and printing textiles. Aluminium sulfate is sometimes used to reduce the pH of garden soil, as it hydrolyzes to form the aluminium hydroxide precipitate and a dilute sulfuric acid solution.