Dawn redwood at Longwood Gardens PA
bengz6westmd
14 days ago
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Bald Cypress vs. Dawn Redwood??
Comments (51)I've planted two Dawn Redwoods. One at my house ('Ogon') and a species type at my parents' house. This was the first year the 'Ogon' began making some strides w/ regard to height. The first growing year after I planted the species, it almost doubled in height; and the second growing season it did much of the same. They both responded well to the wet growing season we had. I had concerns about competing branches with my species type, but it worked itself out on its own. The 'Ogon' is quite flimsy still and requires staking. The species type is very sturdy, growing quickly both in height and caliper....See MoreCoast Redwoods and Giant Sequoias in the Southeast
Comments (55)" There is also a very large, and interesting plantation of them in Maui, not the southeast, but still a really warm humid climate" Nope! Wrong again! The redwoods there are mostly planted above 5000', a climate where dewpoints are always << 60F, thus nights are going to be in the 50s at worse, and even 30s and 40s in winter. Highs probably never hit 80f, even during the worst heatwaves. Not at all a "really warm humid climate". A few are a bit lower, down to 3000', but their growth seems to become abnormal. Even there, summer are as cool or cooler than Boston's!...See MoreWould a Redwood tree grow in Michigan?
Comments (25)"' "There has been quite a bit of discussion of Sequoiadendron in the East on here in the past, blight problems seemed to be a factor even when trees had survived cold winters for years. Even here we may see dead leaders some years on ones that have been in place a long time. I assume this to be cold related but do not know for sure. Might have something to do with our cool summers, the leaders not hardening off fully before cold comes' "Not cold, nor cool summers; this doesn't happen in e.g. Scotland where summers are even cooler". I've had some experience growing Sequoias in northern Indiana and have had blight issues that can actually be fatal. I believe it's the long, hot and very humid summers that do this. I have had good luck spraying the foliage with a systemic fungicide. That has generally taken care of it. However, it has been the combination of extreme cold and high winds that killed my trees. I have now planted a strain of Sequoia known as "Hazel Smith" that is credited with being hardy to zone 5 so we'll see. The Hazel Smiths now have only one season under their belt. Regards, Fred M. Cain, Topeka, IN...See MoreIs it possible to grow a Coastal Redwood in New York City?
Comments (30)Thanks for getting the joke, gardengal. It was a pleasure to demonstrate that I can troll my own response better than anyone else can. Of course Sequoiadendron is much hardier. But the problem is it is also much more suspectible to disease caused by our muggy summer conditions. If you were to blend the Mason-Dixon line with the new USDA zn 6/zn 7 line, you would get an approximation of the east coast boundary between areas where Sequoia (coastal redwood) and Sequoiadendron could be grown on the east coast. Sequoia south of it, obviously, and Sequoiadendron north of it. Even north of the Mason-Dixon line, the several Sequoiadendron at zn 7 Planting Fields arboretum looked pretty bad. OTOH I'm pretty sure I saw one at a garden in Carlisle, PA, zn 6, that looked reasonably well. Nights there are probably a wee bit cooler, and I suspect you could grow them all the way down to Georgia on the highest mountain tops that stay in the 50s at night. Go too far north though, even zn 7 is still going to be too cold for Sequoias. One supposes that the Polly Hill arboretum, for example, has tried them and they aren't on the plant list for a reason. (still meaning to email them about strange tales of a monkey puzzle that dies back in some years yet persists)...See Morebengz6westmd
13 days ago41 North (Zone 7a/b, NE, coastal)
10 days agolast modified: 10 days agobengz6westmd thanked 41 North (Zone 7a/b, NE, coastal)
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