Posted by David MD zn 7 on 3/14/2015, 6:14 am, in reply to "Update........
Thanks for the update Tim.
Nice to see your R. rex pulled through. (we discussed that plant at GOTE) In a wall-o-water like that, with extra heat, it would have been happy as a clam. Maybe even w/o the lights. I found that if I wind-protected rhodies, even if the wall-o-water froze, they did much better than expected. It "only" got down to 1F here, but that was colder than last year (3F).
It will be interesting to see if my damaged rhodies recover well. I'm about to give them a anti-fungal treatment, on the theory that cold damage makes them more susceptible to following-season root rot.
Of the various tender hybrids I have, the most promising survivor is 'Captain Jack' which only has minor leaf burning. It's got a gorgeous, huge, deep blood red flower. It puts other "hardy reds" commonly grown in the northeast to shame, even 'Taurus' which is a pretty good plant. Although it's a matter of preference, some rhododendronophiles would probably like Taurus better.
I'm also pleased the classic Hardgrove hybrids 'Glow Light' and 'Golden Star' look even better than they did after last winter, though they are probably not much hardier and would have been damaged if I'd gone below 0F.
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