There's a book called Heucheras and Heucherellas: Coral Bells and Foamy Bells by Dan Heims of Terra Nova Nurseries. Some regard it as something of a Bible on Heucheras. You may be able to get a copy of it at your library.

You could sink their pots in the ground. I've done that with my mini hostas, and they act just like in ground plants in terms of dormancy, cold tolerance, care, etc.

I started seedling heuchera this spring and would like to plant them out..but we're in a serious drought and it's not safe to plant out yet. I still plan on doing it, they're tough. I'm just waiting on rainfall to resume.

Agree with BlueberryBundtcake. Sink them at ground level at a bit of an angle so that snow/ice/water does not collect on the tops.

Thanks but I don't have a place to put them in the ground. I would need to do some serious editing to make room. That's on hold til spring.

I think what I'll do is sink the pots in boxes of styrofoam peanuts in the garage, leaving the foliage exposed. I've done that in the past for other plants. That should help control soil temp changes. There won't be freeze/thaw in the garage, but probably still good to keep soil temp somewhat even. I looked up the cultivars and they are both zone 4.

Fingers crossed.

I hope I saved a garbage bags worth of peanuts I used to have.... Shippers don't use styro peanuts anymore so I hope my old supply is around somewhere. Bubble wrap should be a good substitute.

p.s. Thanks Deb C for the Dan Helms reminder. I spent the morning drooling over their website heuchera pictures!

Regarding winter heaving of heucheras: Several years ago, I placed bricks around each of my in-ground heucheras, snuggled close to but not covering the crowns. It has worked beautifully here in Massachusetts, zone 5-6 (I cannot keep up with zone changes). Just a suggestion!

Several years ago, I placed bricks around each of my in-ground heucheras

Me too!

I’m not sure why but I’ve never had this ‘winter heave’ problem with heucheras... Certainly I’ve had lots die/disappear in their first winter but I’m not sure that ‘heave’ was the cause. They just didn’t come back. Maybe I should have looked closer...? If something can’t survive the winter conditions here without a lot of fuss, it’s not welcome in this garden! ‘Survival of the fittest’ and all that... :-)

'woody', it has been my experience that some varieties are more prone to heaving than others.

(My fave heuchera is RIO and even as an established healthy plant, with mulch all around in the Fall it still would 'heave' each spring. But I have a couple of others that stay in place just fine) .

On a warm winter day with little snow cover, I would go around and step on my heucheras (and anything else sticking up). Yup, right on the crown! Gentle but firm. The heaving seemed more prevalent in the areas of poor drainage.

My comments probably not the slightest bit helpful to anyone on the east coast but heucheras here are fully evergreen so no "coming back" involved :-) They overwinter perfectly well and since my soil never freezes, no frost heaving either.

Feel free to tell me just butt out. LOL!

But they do experience crown extension.........