garden over winter and? tilling under in the ground in the spring? To break up clay soil and hopefully improve it? Or on top of grass and mowed over as a sort of mulch/fertilizer? I have been finding a lot of it thrown away in dumpsters and "rescuing it"...I don't know if it is expensive to buy, but free is the cheapest of all...guess I am becoming a hoarder...hard to quit dumpster diving when you find usable stuff...and lots of pumpkins for the seeds...also addicted to craigslist "free " stuff and curb alerts...LOL..Help! I can't stop!!

yes a good insulater,& next spring turn it over when spading thr garden ,it keeps the soil loose