No noticeable effect in San Jose, Ca. , famous for sticky clay soil.
Suggest instead brown granular gypsum for lawns and flower beds and general soil tilth, which is about $8 for 50# at most professional turf supply stores, like the one in Campbell, Ca. Brown neutral color vs old white gypsum powder that is not very disolveable,,, quickly dissolves in watering, quick results tho moderate with infamously extreme clay soil in San Jose, Ca.
Also suggest alfalfa pellets, mixed and buried below topsoil. Nowadays about $16 for 40-50# at most pet and feed stores. Twenty years ago was $6 a large bag !! Lots of worms and worm casting fertilizer, quick results, usually mix and cover in late winter and again in mid-Summer.
