Soil Acidifier

SOil acidifier should be used the previous fall if possible. At least as early as you can. The process by which soil pH is raised or lowered takes a few months. Add lots of peat moss to your blueberry beds BC it has low pH to begin with and holds moisture..
As to applying fert, apply around drip line 6 in from base at the time of new growth in spring. Then every six weeks till mid summer.

1

Garden sulfur lowers soil pH over time, so it's best to follow the directions and then test the soil pH again. Repeat as needed. Planting in containers is always an option while you amend the native soil.

do not mix with water. Sprinkle the proper amount around the plant and mix it into the first couple of inches of soil. Be careful because the roots of the blueberry bush are very shallow.

Both; Our soil is clay, so we mixed lots peat moss and sand into the huge holes we dug, as well as lots acidifier, as our ph is 7.5 , . in ten years, our blueberry bushes have grown taller than us, and we cannot pick all the berries :) , also, we mulch them with pine , and pull all the weeds. We usually have a lot of rain too. Blue bushes are wetland plants, which is why they require these conditions to really produce .

The instructions refer to an actual cup. The utensil that comes in the package is just a scoop for your convenience.

The main purpose of the acidifier is to make your soil acidic. You would be best off filling your container with acidic soil, because blueberries can only grow in acidic soil. If you cannot find acidic soil, then "yes", this product is good for container grown blueberries. Put in healthy soil and acidify it with this product, and you do not need to worry about fertilizer at first, but if you need to fertilize, I suggest you get an additional product with nitrogen and potassium.

Blueberries like REALLY acid soil. If you could get the ph down to 5, it would be happy. In a 16” pot, I think I’d start it with about 1/4 cup of the acidifier. Then mix it up, hydrate it (slowly so the water doesn’t just run out and waste your acidifier, like in a bucket). Let it sit overnight, then test the ph the next day. If it hasn’t budged, add another tablespoon or so. The acidifier doesn’t work instantly, but if it’s heading downward, you’re probably fine. Just keep testing and testing. Dropping ph by more than 1 is a challenge.

The instructions say to use 1 cup of soil acidifier per square yard of planted area; sprinkle soil acidifier evenly beneath growing plants to be treated. Then work into soil with hoe.

If it has been a few yrs, there shouldn't be too much of an issue with the high nitrogen content from their manure and burning your bushes. It would probably be a good idea to take soil samples by the extension service in your county to have it tested just to be on the safe side and to determine what kind of additives you would need. My whole entire garden is located where we fed cattle for years. We've also hauled in well rotted cattle and horse manure to mix into the soil around rhubarb and aspargus and have had good results.