Frost damage?

[BrockD]

Hello, I have a well rooted 15g Baileyana planted in ground about 6-7 months ago. It’s been doing great aside from the discoloration of the leaves so I added sulpomag right around the same time as we got a morning of hail and two mornings of frost two weeks ago. I’m unsure if this is entirely due to frost or sulpomag.  I’m wondering if this dying off will continue on the new emerging spears or not. 
 

I live in North San Bernardino CA - 
 

pictures below 

 

 

help would be much appreciated as I’m trying to save this palm !

[BrockD]

I wanted to add that the lower leaves of the plant smell like sulfur / eggs 

[Merlyn]

I have a similarly-sized Baileyana and Fallaensis, and they both took frost with no problems.  I had 28F with medium frost on Christmas night, and 30-31F with heavy frost on Thursday morning.  What kind of temperatures did you get there?

The palm looks like it is buried pretty deep.  I know Copernicia have "contractile roots" and mine have seemed to suck themselves down into the ground.  So the planting depth may not be an issue.  See more info here: 

If the older fronds smell like rotten eggs there's a good chance it has a fungal infection that needs treatment.  I use Banrot systemic on my palms, and other treatments like Fosetyl-Al, Hydrogen Peroxide pours, and Agri-Fos might help also.  I'm not sure if sulpomag would cause problems, I have never used it.

[BrockD]

Thank you Merlyn, 

 

I think I got around the same temperatures with a mild frost.  I might of watered too much because I’ve been trying to green up my lawn? 
 

I poured hydrogen peroxide around the palm in the soil and it was bubbling quit a bit. I also removed the dead fronds. This is its current state. 

[Merlyn]

Does it smell like rotten eggs/sulfur down near the base or near the new spear?  Did hydrogen peroxide bubble up when you poured some into the crown around the spear? 

Hopefully some other people can chime in here with additional suggestions!

[BrockD]

It smells like rotten eggs closer to the old fronds. When I’m down wind it just smells like it from 2 feet away. I poured Hperoxide ion the ground around it and it definitely bubbled. More so on on side. Figured it couldn’t get much worse if I tried that. I removed 2-3 inches of mulch and left the remaining mulch there. It got up to 80 degrees today so I’m hoping the heat will pull it through. 
 

in any case I’m hoping to save the palm. It looks like I have two good emerging spears growing. 
 

- I may need to order banrot and more hydrogen peroxide.