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Sabal Palmetto Help


MAPalms

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It would be great if you could help with this Palmtalk. During the winter, I pulled in my palmetto into the house on the coldest nights, when it got below 15 degrees. The rest of the winter it spent on the screened in porch which has a roof. I kept it right up against the house. I placed it outside around 5 days ago. I just came back from a trip and the fronds seemed to have yellowed. It was in the 60s every day and didn’t go below 40. The spear is still very secure and the smaller spear is still green. What is wrong and what can I do to help? All help is well appreciated.
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Root damage?? probably from too cold.  Roots much more sensitive than fronds.

Edited by Allen
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This damage did not appear until this warm spell, maybe because damage doesn’t show until later sometimes? How would I know if the roots were damaged and what could I do to remedy the issue?

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1 hour ago, Allen said:

Root damage?? probably from too cold.  Roots much more sensitive than fronds.

I agree with @Allen that cold damage to the roots > fronds showing up with warm weather is likely. Do I see roots growing out of the bottom of the pot? This could be a quite vulnerable specimen. The advice I see most commonly for cold damage is to provide good supportive care and observe. Watch very closely for fungal damage at the spear area. Avoid overwatering. Protect from any further cold   When the conditions can support root growth ( > 65 degrees soil temp), it could be planted or up-potted.

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Zone 6b maritime climate

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How long prior to you putting it outside has it been since it has been in direct sun?

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Was it dry? You mentioned you were gone for a period of time and it looks like this palm is still in the nursery pot and may need to be repotted into a larger pot . Harry

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Too cold. Potted plants are much less cold tolerant. If it were me I would’ve brought it in under 32F. It’s in a pot so it’s easy to move. No point in stressing it out. 
 

Not too much you can do now but wait. 

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I never leave plants in pots outside when it will freeze because the pot can easily freeze through solid , being so exposed . I just keep my outdoor plants as house plants until I plant them outside . I hate to say it but I have palms and plants  that I planned to plant 5 or so years ago ,  but I never got  around to it so  I just keep them as houseplants . I plan on remedying that situation  this spring .

Will

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It only happened after I moved it outside. There was some damage before that but it was limited and not spreading. Did I shock it by moving it into full sun? It has had five days since I moved it. It did not react like this to other warm ups we have had in this rollercoaster of a winter and spring. Thank you for all the help.

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I would treat it like you would treat spear pull.  Much of the cold damage to palms comes from the rot that occurs after they warm up.  At a minimum pour some hydrogen peroxide down the central spear area and then tug it from time-to-time.  It may pull yet.

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Posted (edited)

Ok. I will add that the fronds are staring to curl up….. anyone know what that means? Also, how do I apply the hydrogen peroxide? 

Edited by MAPalms
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