How much of this do I need to use? I applied a whole 6 pound bag and the PH didn't seem to change. It's still 7. I need to get it to 5

In my experience, purchase a ph meter and apply ph modifier every other week until the ph reaches your desired level. It's worked for me. Use the same measuring device so your application is controlled. I have blueberries that are not all that big and so only apply where the roots are actually growing - maybe a 16" diameter circle around the base.

How much of this product should I use to lower 100 square feet by 1 ph level?

the package instructions state: "apply 12 lbs per 100 square feet for each one point reduction in soil pH desired. For heavy clay soils increase rate to 15 lbs. Gradual reduction in soil pH is preferred as dramatic reduction can result in stress". I find that credible since the product does help considerably for alkali sensitive plants.

what does the side panel say?what is the amount of sulfur in this product % wise? whats the n-p-k of this product?

Analysis according to the label: Sulfur (S).................30% 18%............. Free Sulfur (S) 12%............. Combined Sulfur (S) Derived from: Elemental Sulfur and Gypsum There is no N-P-K in this (nitrogen, phosphorous and postassium). This is only 30% elemental sulfur, 18% of it being free/actual elemental sulfur that can lower pH and 12% locked up in gypsum (gypsum does not alter the pH of soil). That means you need to use about 5x more of this than pure elemental sulfur powder to achieve the same pH reduction. Gypsum is calcium and sulfate. This may work well if your soil needs sulfate or calcium which is very rare especially for hobby gardeners. Gypsum can help remove sodium and magnesium from the soil, but not lower pH as this product is labeled to do. If you're not buying this product to add calcium or sulfate to your soil, I would recommend buying pure 99-100% elemental sulfur powder instead as it will work faster (if ground to a fine powder) and is 5x more potent for acidifying soil whatever your purpose (e.g. turning hydrangeas blue or amending soil for acid-loving plants). You can buy a 5 lb bag of 100% elemental sulfur powder for about $20. You can also use iron sulfate or aluminum sulfate soil acidifiers instead which will work faster than sulfur, but you run the risk of iron or aluminum toxicity if you use too much, you need to use 6-8 times more than elemental sulfur and they are both more expensive. Hope that helps!

Can this be used for a lemon and lime tree?

Lemons prefer soil pH levels between 5.5 and 6.5. Lime trees enjoy slightly acidic soil. This product can increase the movement toward the acidic side, given you need it.

ASIN	B0063ZDQ66
Best Sellers Rank	#152,157 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,024 in Garden Soil
Brand	Espoma
Customer Reviews	4.6 4.6 out of 5 stars (1,935)
Is Discontinued By Manufacturer	No
Item Form	Granules
Item Weight	1 pounds
Item model number	GSUL6
Liquid Volume	6 Liters
Manufacturer	Espoma
Number of Items	1
Product Dimensions	4 x 7 x 12 inches
Specific Uses For Product	Gardening,Organic
UPC	050197030069
Unit Count	96.0 Ounce

EspomaGSUL6 Soil Acidifier, 6-Pound

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