STOP THINNING mature DOUGLAS FIR trees, look at the research

If you often thin, or recommend thinning on isolated Douglas Fir trees (not a large stand of trees) then please watch this video.

00:00:01 Intro
00:01:45 Example of a Douglas Fir tree that requires pruning
00:04:34 Hazard mitigation pruning of long, heavy limbs
00:05:19 Douglas Fir tree we pruned for to reduce risk of limb failure in strong wind or snow load
00:06:14 Julian Dunster's thoughts of thinning or 'Spiral pruning'
00:08:22 Nick Dankers paper titled 'Pacific NorthWest Conifer Care Guidelines'
00:11:04 Example of more risk mitigation pruning of long heavy limbs over a house with glass skylights
00:12:13 Final thoughts

#DouglasFir #Arborist #TreeWork