Perhaps someone who knows the numbers better can answer for sure...but I think your hosta would be happier sleeping for a while. They need a certain length of "sleep"....which is one of the reasons they don't grow well in South Texas but grow very well in Canada. Trying to cut back on the dormant period is a little like forcing a horse to work without enough sleep. Sure you will get more work for a while, but eventually something's got to give.
Linda C

How much trouble do you want to go to?

I have bought several Tissue cultures and have alway's planted them outside and have never had a problem with them coming back in our harsh Iowa winter's.The one thing I noticed is they are a little late coming back and seem slower to increase. Maybe it's just the type of hosta, I will see how this year goes.

i have bought hosta 'forced' for sale in march at hosta college ....

frankly .. though i tortured them by not having a greenhouse to bring them home too ... i felt they went dormant earlier than normal.. and were actually stunted the following year ... go figure...

BUTthe biggest problem i defined was that the furnace sucks all humidity out of the house ...and i felt that hosta .. being a water loving plant... transpired too much and just couldn't keep up ...

good luck

ken

I think it may depend on the age of your TCs. I believe that growers normally grow TCs in greenhouse conditions for two years before they go to market. Nurseries will sometimes grow them on for another year either in a greenhouse or hoop house that provides protection from the cold.

I personally have grown a few second year TCs indoors over the winter and then put them out the next year. They do fine, particularly the ones that have have weak root systems.

There is no problem growing any hosta indoors for the winter for one year. But they do weaken if you don't give them dormant period the following year. I remember testing this some years ago.