What is super phosphate used for and where can it be obtained? Is it the same thing as tri-sodium phosphate that can be bought at the home store?
Certified GKH Gardening Expert
Superphosphate is used for adding nitrogen to the soil. It is not the same as tri-sodium phosphate. Whether it will be available from your local home store is not certain. Some areas of the country carry it while others do not. I am not certain why.