Beginner Gardening: Hydrangea color? Help!!, 0 by 1840_yard

1840_yard wrote:
Haha :/ I was afraid of that. Since it turned a dark pink within a week of adding the acidifier (they were mostly blue to begin with) I was hoping I could reverse it quickly as well. I took a probe Ph tester and discovered that the soil in that area actually is a level 7. So much for knowing my soil. I went around various other places in the yard and found the Ph level to be anywhere between 5 & 7. So. I guess the acidifier didn't actually turn the hydrangeas pink, rather the soil! So...what's the proper way to lower the Ph level to a "blue" level and how long until I should see results? I've attached a picture of the organic acidifier, if that tells you anything, ecrane3.
Thanks for any help you may be able to offer.