Trees of Bristol : Age Estimation

Table of age of maturity and width of ring in mm :

Common oak Turkey Oak Red Oak Beech Sweet Chestnut Walnut Black Mulbery Ash Common Lime Horse Chestnut London Plane Yew Robinia Monkey Puzzle Tree Black Pine Tulip Tree Deodar Cedar Cedar of Lebanon Holly Sycamore Silver Birch - Cardiff z-Model Calibration
Urban site 70/5.3 50/5 80/4.5 40/6.5 60/7
Champion 70/5 30/10 60/6 80/6 100/5 100/6 60/5 60/6 70/7 40/8 60/6
Good site 80/4 40/6 70/5 70/5 70/5 55/4 40/3 50/5 80/5 50/5 60/6 70/5 45/5 70/5 50/6 50/7 60/6 80/6 60/5
Average site 100/3.5 50/5 80/4 70/4 60/5 50/4 30/3 70/4 70/5 40/5 70/5 60/4 80/4 60/4 70/5 50/5 50/6 70/5 70/3.5 60/6 60/4
Churchyard 40/6 60/4 50/4 80/5 50/5 70/5 55/3 80/4 60/6 60/3
Poor site 120/3 60/4 40/5 50/3 40/3 50/3 60/3 60/5 50/4 80/4 80/3 60/5 60/2
Woodland 100/3.5 20/5
Inside Woodland 70/2.5 120/3 100/3 100/3 30/3 60/4

Calibration data obtained from Information Note FCIN12 "Estimating the Age of Large and Veteran Trees in Britain" by John White from the Forestry Commission.