MsDoe said:Perlite floats. When you water, or when it rains, it will wash away.
Yes,
it has the same pitfall as other light mulching materials.
To resolve this problem, i was planning to use a fine aluminum mesh like this one:
https://apfuhuawire.en.made-in...
over a rigid frame ( 2 feet by 2 feet, 1 or 2 inch thick) to enclose the perlite (using the biggest size of perlite available).
Then i would just lay it on the ground without fear of the perlite washing away.
Again, that's involved and costly, but it would probably last dozens of years and would be scalable in size.
