mikell, Howdy;
Here in New Mexico, the Southern part, temps rarely go below 10 deg.
The owners put plant pots (flimsey plastic), over to top (the risers are maybe 6 - 8 inches tall), and filled them with dirt.
Now, in Central Utah, where it can get down to - somethings and stick there for awhile. The risers are about 18 -20 inches tall, the owners place 24" pieces of 10" or 12" ID PVC pipe over the risers and fill with spun fiberglass insulation (think pink), then put a heavy rubber bucket over the top.
Just what I've seen. Each works for it's own enviroment....
hankaye
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Striving for a less complicated life since 1949 ...
Home: 2008 Cougar 278 RKS
T.V.: 2004 F-250 4X4, Level III BulletProofed , Detroit Tru-Track Differential (915A550)
Dog: 2006 Border Collie (Rascal) aka Maximum fur dispersal unit. (08/04/2006 - 12/16/2017) RIP.
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