Wyevale Nurseries has collected the nuts from Dymock, where mature oaks planted more than 100 years ago, and will be growing them on in the spring for people to re-plant.
Sales and marketing director Adam Dunnett said: "So far we have collected more than a tonne of acorns ready for storage overwinter and then spring sowing. The young trees will be ready for planting from autumn 2016 onwards.
"By collecting our own seeds, we are able to register their provenance, which is vitally important to the conservation of British varieties. Provenance certification is often requested on landscaping schemes for sound ecological reasons – sourcing native plants to fit in with native flora.
"Not only are we preserving traditional British trees but also providing landscapers and garden designers with local provenance trees which have not travelled hundreds of miles, will digest CO2 as well as roosting hundreds of mini bugs. These trees will enhance tomorrow’s world.
"We also had an excellent harvest of native seeds including Quercus, which are now tucked away in the cold store for stratification. When we get them out in the spring they should be primed ready for rapid germination."