Her husband, Bryan, is also looking forward to the show - when it is over he will get the glasshouse back to plant his annual crop of tomatoes.
Despite apparent conflict over valuable glasshouse space, in fact husband and wife are both orchid fans.
It was through their interest in orchids that they met and married.
Mrs Harper is president of the orchid society, in which she has been involved for 26 years - from the third meeting after it was founded.
His first orchid was "a little cymbidium" which she bought as a pot plant.
To learn more about orchids, she went to a meeting where an expert was giving lessons on repotting.
The expert was selling orchids, so she bought some more.
And it grew from there.
Now, she has a dedicated orchid house and takes over the tomato house to bring plants in under shelter during the winter.
In her collection are all varieties, including some of the more unusual.
One she will be taking to the show, not as an entry, but to let people see it, is the miniature epidendrum polybulbum, grown on bark in a frame.
The ones that are serious entries have been carefully selected from her collection, brought on to top condition and of the highest quality.
