The "new growth" part is because the trees are harvested from farms as soon as they're big enough. This is as opposed to "old growth" where the trees are more mature and stronger.

Think veal versus beef in terms of texture

[–] [email protected] 4 points 10 months ago

Also the density they're planted at. Tree farms have the spacing down to a science for maximum growth per year per acre.

[–] [email protected] 4 points 10 months ago

The maturity of a tree does not affect wood density. Density is determined by the stand density the year the ring is added along with factors such as soil moisture, temp etc. the inner rings will have the same density, whether the tree is harvested after a few years or after 200 years provided the tree stayed healthy.