Snow and average night-time temperatures of around minus 10 degsC have brought Cumbria-based Weasdale Nurseries to a halt, with no stock being lifted or planted.
Partner Andrew Forsyth said: "This season we have had a cracking start but we are snowbound. It's like a mini ice age here. The bare-root business is one of a few that relies on the weather."
He said he will now add container-grown stock to the offer in 2012: "Container-grown stock is really an inevitability - we have just sunk a borehole. We are not in a situation where we have a suitable site for a garden centre and we just want to extend the season. Container stock will allow us to do that."