[Kajazy]

A friend has given me 2 bags of 100 litres (yep, that's 200 litres!) of Perlite....! I have pretty heavy clay soil up at the allotment, but am hoping to set up a new asparagus bed this year and wondered if I could add the perlite to help with the drainage? What are your thoughts...?

[fatcat1955]

Sharp sand or Gypsum would be better.

[Trillium]

I'd recommend the sharp sand and gypsum as well. Eventually, as the perlite reaches the surface it can blow away and create another problem.