Where do all the trees in our public forests come from?

Millions of trees are planted out in our public forests each year...but where do they come from?

We visit a specialist nursery where the timber trees of the future are being grown from seed. A new £5 million glasshouse is being used to grow a greater variety of species, to help make our forests more resilient and able to cope the changing climates.

Presented and produced by Heather Simons.