The Hampshire-based company has been growing the super semi-mature trees, which are between 40-80cm girth, for over 20 years on its 500 acre site in Petersfield and many of these trees are now ready for sale.
Hillier Nurseries marketing manager Caroline Swann said the trees are unique for the UK market, because they are the only commercially grown trees of this size produced from seed in Britain.
Hillier Nurseries director Hossein Arshadi, in charge of the amenity side of the business, said: We started growing them twenty years ago when we realised there was a gap in production.
He added: Hillier used to grow big trees during the war but afterwards reverted to producing young standards. Lots of firms went to Germany for their mature trees but during the boom in the 1980s developers wanted instant impact, so we decided to grow bigger trees again. Some of our trees have girth over 80cm.
We can say they are truly British grown and therefore have local provenance and a low carbon footprint.
The trees are dug up using a bepoke rootballing machine, which was specially designed for Hillier last year for the purpose. The company use a local transport firm to deliver the trees, which can weigh over a tonne, on arctic lorries.