yes, you’re right. trees are simply incapable of self-seeding.
i’ll be late home tonight, as i’ll be stopping to cut back the young oak, sycamore, ash, beech, birch, lime, rowan, trees that are now growing so fast they need regular, almost weekly, ‘training’ to stop the cycle path getting blocked.
it’s on the old orgreave site btw, as far as i can tell it’s all self-seeded. When i started it was mostly brambles, but after a few more years, the trees are a bit bigger, and the brambles a bit smaller…
(it’s really quite nice to ‘watch’, and i’m quite proud of my developing tree-tunnel)