Builders sand in the garden
Is it harmful to plants when used to lighten heavy clay soil?
builders sand often contains salt and sometimes toxins to stop weeds.
It also helps to bind the cement, so builders sand will worsen the situation.
I have personal experience from many yeas ago...
Best thing is lots of organic matter, failing that, horticultural grit or sharp sand
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
Scariff, County Clare, Ireland
Sharp sand is different from builders' sand and can be used (with lots of organic matter) to improve heavy soil. Organic matter is the most important thing to use for this purpose, though.
"The one who plants trees, knowing that he will never sit in their shade, has at least started to understand the meaning of life." Rabindranath Tagore