North American Fruit Explorers mailing list at ibiblio

["Jim Fruth" <jfruth@tds.net>]

   Every time I used a single sheet of anything for frost protection, I 
learned I wasted my time and the plant I tried to protect got fried by frost 
to the same degree as unprotected plants got frosted.  One sheet of 
anything, whether it be plastic or bed sheet or(?) is worthless.  TWO 
sheets, however, can trap an insulating layer of air between them affording 
some protection.

Jim Fruth
Brambleberry Farm
Pequot Lakes, MN  56472
www.bberryfarm.com
(218)568-8483 [Store]
(218)831-7018 [My Cell]

Another option is to cover them with visqueen (plastic).  Visqueen is clear 
and will let light through while protecting the blooms from frost.