Hans,

The problem seems to be the other way around for me.. Sequaoiadendron does very well here... it is Sequoia what I keep killing every winter... I've killed 3 so far.
It's not the minimum lowest, but rather a combination of factors what ultimately kills them...

Hi Hans Olav,

I live near Flensburg. So - I think - not so far from you. The same losses in my garden. 4 hard winters, last year a 3m Sequoiadendron gig.'Glaucum'. This year some more cultivars. March and the beginning of April too much cold, dry wind. Also damage at Cunninghamia and Sequoia.Most Sequoias I lost the years before.
Most of the Sequoiadendron look very ugly. Too much brown needles.
We need more than one mild winter to regenerate.Some with damage from last winter - I think - are dead now.Taxodium is too early to say more.

Wolfgang

Taxodium is usually very hardy. That would be strange for it to be damaged by cold there. Are you sure it is dead? They can leaf out late, even where native.

Sequoiadendron and Taxodium dead in Denmark!? Just how cold did it get?

The coldest nights were down to around -20C I think, but more usual night lows around -10C to -15C. But thats not the main problem. Main problem I think was that March was unusually cold (but not very cold), very, very dry and still with long periods of high sun.

Some areas in Denmark had dust storms which is extremely unusual.

Hans Olav

Interesting. My 3 Taxodium ascendens had some winter-kill the first few seasons. Regular bald cypress had none. I don't think Taxodium ascendens is as cold-tolerant as BC, but I wouldn't think it would have issues in Denmark. Something else was prb'ly in play also -- the very small, shallow root system of a seedling perhaps.

I agree with Hans Olav. This winter it was not the deep temperature. We had only -11,5ðC the deepest. But over nearly 6 weeks storm or very strong wind from East or North-East ,which dried out all the thinner needles of Sequoiadendron,( Also Sequoia and Cunninghamia and the tips of Cryptomeria )).Most damage I had on Sequoiadendron. They cannot survive with cold wind and storm over a longer period when they are younger in age.

I also lost some Taxodiums during winter some years ago
, but I'm not sure what were the reasons.

Wolfgang

Taxodium does not leaf out here until the end of May or early June, and the leaf buds are very small, almost invisible.

Highly unlikely that yours have been killed. Don't give up on them yet!

Resin