When I one to plant in the area that is usually hard as rock, I was able to easily get a shovel in. I just put some down hoping for the same great results next spring.
Took a whole bottle of soundclay, but it broke up my soil that was as hard as cement!!! Lawn was suffering badly until I started using the product combined with the liquid humate. Recommend to everyone in a new home with the compacted clay dirt.
I used a combination of Restore Clay and Liquid Humate on a 600 sq ft area under a Japanese Snowball Tree. The soil was rock hard (North Carolina clay!) when I started applying the mixture. Even though it's a small area, I still used a hose applicator; so far I've applied the combo three times and am definitely seeing a difference. Directions suggested 3 or 4 applications a year, but this area was really like concrete so I figured more frequent applications couldn't hurt! I've been diligent about watering after each, and I'm thrilled with the overall results - to the point that I've been able to move the soil enough to plant some hosta, astilbe, and ferns. The plants seem to be flourishing - will give you an update in the spring!! I would say RestoreClay is a success!
Have not had a chance to dig new holes for trees yet; will reply in spring next year. Good product reviews and expect good results.
I don't know how effective as I don't have another untreated area to compare it too. I did notice that water did not pool as it did previously