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Robusta absolute cold hardiness?


jwitt

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2/2011 Alamogordo NM 

Temperature history in February 2011 in Alamogordo 2x.png

alamo2.png

alamo2007.png

Edited by jwitt
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Did I get this right? Those W. robusta survived -23°C/-10°F in prolonged freeze?

2023 High 37.3°C Low -3.9°C

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That's amazing! Are these palms on the picture pure Robustas if so I'm very impressed.  I know they're cold hardy palms and it takes a lot to take them down.  Was it a dry freeze and how long ? 

Edited by MarcusH
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1 minute ago, MarcusH said:

That's amazing! Are these palms on the picture pure Robustas if so I'm very impressed.  I know they're cold hardy palms and it takes a lot to take them down.  Was it a dry freeze and how long ? 

Define "dry" freeze please.  

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3 minutes ago, jwitt said:

Define "dry" freeze please.  

No freezing rain 

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10 minutes ago, MarcusH said:

Or even snow 

Rain turned to snow. First night of ten below was abjective(wind), second was radiational.  Two consecutive nights of ten below.  Temperature data in chart above. 

 

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30 minutes ago, Hortulanus said:

Did I get this right? Those W. robusta survived -23°C/-10°F in prolonged freeze?

Consecutive nights of -10f(actually a bit colder!).

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6 minutes ago, jwitt said:

Consecutive nights of -10f(actually a bit colder!).

That's incredible! Even if they're a bit hybridised... 😨

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2023 High 37.3°C Low -3.9°C

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At some point, the rain froze, then 7" of snow fell. 

Screenshot_20230207-200931.png

Screenshot_20230207-200803.png

Edited by jwitt
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Some more Alamogordo robusta survivors.  Can they take colder temperatures without trunk scarring or constriction?  

 

Screenshot_20230207-212300.png

Screenshot_20230207-212457.png

Edited by jwitt
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