In a message dated 98-06-01 08:46:00 EDT, HoroRL@AOL.COM writes: << Do perrenials grown in hypertufa containers need to be over wintered in a coldframe or buried in the ground or just be left out? >> I have heather in a container and I keep it in garage and keep waterered in the winter. It does not freeze there. Heather need lots of protection here. A few miles closer to the ocean it winters well.Otherwise I would bury container at ground level if I had hosta or really hardy plants in it. Barbara Jones Mass 4b/5