The continuing dry spell has devastated the region's Christmas tree stocks as the fledgling pines struggle to cope with the lack of moisture.

St Nicholas Christmas Trees proprietor Megan Cooper said an average Christmas tree could take three to five years to mature.

Like farmers across the country, Ms Cooper said the extended dry spell had prevented growers from producing enough trees to harvest for Christmas this year.

''The drought has knocked us around quite a lot and there's not the volume of trees around,'' MsCooper said.

''A lot of people didn't plant two or three years ago so they don't have that rotation coming through now. They haven't had the growth in the trees they've got, either.''

While stocks may be down, MsCooper said demand for the festive tradition was ever-increasing.

The family-run St Nicholas Christmas Trees is in its eighth year supplying trees to the Canberra community and Ms Cooper said it was a highlight of her year.

''I love it. I love selling the trees,'' she said. ''People get them and are just so excited ... selling them is just the loveliest thing to do at this time of year.

''People love the smell and they do look quite lovely, even despite the drought.

''If people follow the care instructions they'll easily last for three weeks.''