Hosta Eyes not Unfurling?

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Hi Everyone

Would someone know why I have a few hostas that have eyes/pips (still not sure what to call them) that broke ground , grew an inch or 2, and stopped?  They're not growing any more, aren't unfurling, just sitting there!  I had a large 'Sagae' in a pot, half the plant grew normally , the other did what I described above.  I poked about and the eyes are firm, and looks like new buds are growing from the eyes that aren't. 

Any ideas what happened?  Is it cold damage?

Thanks

Smile
Barbara

 

mail to:  "t*@acbm.qc.ca"