odd

[Paul Barton]

:Duh! They are Holm Oaks!

[greengrafter]

Thats weird!!!

 

The only thing green around hear is the grass and leylandi.

 

although I saw thorny hedge with small sprouts on it the other day as I drove by it.

I thought I was going mad!...... it appears not.

 

Does any one know why this is especially as it's been so cold?

[Andy Collins]

We were commenting on the oak leaf retention the other day. The 1st half of Nov was unusually warm for the time of year, the 2nd half exceptionally cold. Perhaps the extreme quick change caught the trees out?

[armchairarborist]

shot this lastweek whilst in a traffic jam on the m6

[Xerxses]

We were commenting on the oak leaf retention the other day. The 1st half of Nov was unusually warm for the time of year, the 2nd half exceptionally cold. Perhaps the extreme quick change caught the trees out?

 

This happens every few years in Sweden. Absecion is due to light and temperature apparently so when we get an unusually warm winter and sudden snow and cold. The trees recover and old leafs drop as the newones form.

[Graham]

Can not abscission be affected by particularly high numbers of pests eg aphid? Rather than shut down and form an abcsissional layer the tree continues to produce food to compensate for its loss to aphid? I'm quite probably way off the mark but I'm sure I recall something like this from many years ago:confused1:

 

Maybe, given oaks propensity for hybridisation, some are not true robur or petrea but have a little suber in them from the popularity of planting Lucombe oak on the great estates in the 18th century. I now think I'm getting even further from the mark:001_smile: