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Product Overview
Hi-Yield Aluminum Sulfate is used as a soil acidifier to correct undesirable alkaline soil and to make Hydrangea blooms blue. Before using Hi-Yield Aluminum Sulfate test your soil pH and if the pH is above 7.0 then this product will be effective in bringing the pH down towards 5.5 which is desirable for plants that require more acidic soils. Plants such as Hydrangeas (blue), Azaleas, Camellias, Rhododendrons, Gardenias, and Holly thrive in more acidic soils.
With Hydrangeas remeber that Hi-Yield Aluminum Sulfate can turn white or pink blossoms to blue.
Do not use Phosphate fertilizers with this product as the phosphate will make the Aluminum less available to plants.
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Details
Active Ingredient Aluminum Sulfate 17.09% Target pests Alkaline Soil conditions For use in Acid-loving plants such as: Azaleas, Rhododendrons, Camellias, Gardenias, Hydrangeas (Blue), Junipers, Yews, Cypress, Caneberry, Huckleberry, Magnolia, Oak, Pine and certain others
* See label for complete listApplication Shrubs: 1 lb. per 3 ft. ht. per 5 gallons of water
Trees: 1 lb. per inch of diameter per 5 gallons of water
* See label for complete application instructionsPet safe Yes, if used as directed on Label Special Features Maintains or Changes color of White or Pink Hydrangeas to Blue
Helps create an Acid Soil ConditionShipping Weight 4.00 lbs Manufacturer VPG (Mfg. Number: 32175) UPC 732221321755 HI-YIELD ALUMINUM SULFATE is used primarily to acidify soils. Determine current pH level with a soil test. If pH is above 7.0, an application of Aluminum Sulfate will be effective in lowering soil pH to the 5.5 range which is desirable for growing acid-loving plants. Recheck the soil pH two weeks after application. If needed, reapply only to those areas where the desirable pH is required to maintain vigorous plants.
HI-YIELD ALUMINUM SULFATE helps create an acid soil condition (corrects excess alkalinity) which is desirable to the growth of certain type plants, such as Azaleas, Rhododendrons, Camellias, Gardenias, Hydrangeas (blue), Junipers, Yews, Cypress, Magnolia, Oak, Pine and certain others.
By acidifying the soil, HI-YIELD ALUMINUM SULFATE can maintain or change the color of Hydrangea flowers. Blue Hydrangeas require Aluminum as an acidifier, to retain their blue color. They should not be fed a Phosphate fertilizer due to the fact that it has a tendency to “tie-up” Aluminum. Do not use HI-YIELD ALUMINUM SULFATE on white or pink varieties unless a color to blue is desired
DIRECTIONS FOR USE
SHRUBS
Use 1 lb. per 3 ft. of height. Mix 1 lb. in 5 gallons of water and apply at the drip line of the shrub. HI-YIELD ALUMINUM SULFATE can also be spread dry around the drip line and watered in.
TREES
Use 1 lb. per inch of diameter. Mix in 5 gallons of water or apply dry at the drip line of the tree and water in thoroughly.
SOIL
To help correct alkaline soil, use 5 lbs. per 100 square feet. Wash off foliage and water in well after application.
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Product Documents
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3 Customer Reviews
Top Reviews
Worked Great!
By Caterina on 04/20/2020
Bought this to reduce the pH level for our Gardenias and we now have no more yellow leaves.
Hi Yield
By Darren on 10/31/2020
Good stuff for your garden certain plants, and tanning rabbit hides
Works Quick
By Bert on 08/03/2025
This bought my ph down within about a week's time. I was extremely pleased with the results.
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11 Questions & Answers
Helpful Q&A'sQHow often do I apply this Hi-Yield Aluminum Sulfate to my hydrangea to keep it blue?APer the product label: Recheck the pH two weeks after application. If needed, reapply only to those areas where the desirable pH is required to maintain vigorous plants. Hi-Yield Aluminum Sulfate hel…
Read Full Answer »Per the product label: Recheck the pH two weeks after application. If needed, reapply only to those areas where the desirable pH is required to maintain vigorous plants. Hi-Yield Aluminum Sulfate helps create an acid soil condition which is desirable for hydrangeas (blue). By acidifying the soil, Hi-Yield Aluminum Sulfate can maintain or change the color of Hydrangea flowers. Blue Hydrangeas require Aluminum as an acidifier, to retain their blue color. They should not be fed a Phosphate fertilizer due to the fact that it has a tendency to “tie-up” Aluminum.QHow much Hi-Yield Aluminum Sulfate do I use on a strawberry plant?AHi-Yield Aluminum Sulfate is not labeled for use on anything edible. It is only labeled for use on trees and shrubs.
QCan I use Hi- Yield Aluminum Sulphate to tan animal hides?AHi-Yield Aluminum Sulfate is labeled to be used as a soil acidifier not animal hides. We recommend that you contact the manufacturer of the product for more information on the usages of their p…
Read Full Answer »Hi-Yield Aluminum Sulfate is labeled to be used as a soil acidifier not animal hides. We recommend that you contact the manufacturer of the product for more information on the usages of their product. VPG can be reached at 888.583.5296.
