parajubaea sunkha

[Brahea Axel 270]

5 days of freezing temps, one day all the way to 26.6F, several leaves on a 15 gallon double got 30% burn damage. This specimen was 10 feet away from a copernicia alba that was untouched by the cold. This palm isn't very hardy as a seedling. The reports that this palm is hardy to 20F cannot be right. People are probably protecting their palms through their freezes. My p. cocoides seedlings have fared much better.

[Rafael 424]

In my colder yard, the seedling i am growing withstood 27,5F untouched.

[JEFF IN MODESTO 368]

Perhaps it was a mismarked p. cocoides?

Jeff

[Stevetoad 1,883]

Since it's in a pot how long has it been grown unprotected? My sunkha saw 26 last year with 7 days in a row under 32 with no damage at all. Mine is in the ground so maybe that is part of the issue. Also a strap leaf has more surface area than a pinniate leaf and maybe that is also an issue.

[_Keith 757]

That was the only PJ I had trouble with. PJ TT was great. It almost made it, except for,,,,,,,,,,,,,,,not cold

[Brahea Axel 270]

It's a double sunkha, not a cocoides. Who knows why it fried. All i know is it got damaged, could be lack of acclimatization.

[ghar41 201]

Thanks for starting a thread here, Axel. We have been talking about it for many years but it's been lumped in the Parajubaea thread as well as many other places. When I get home I'll post some pictures and share some info.

http://www.palmtalk.org/forum/index.php?/topic/3108-parajubaea/

[Brahea Axel 270]

Perhaps this will clarify a few things:

[Mandrew968 1,607]

What kinda citrus is that?

[Brahea Axel 270]

What kinda citrus is that?

Navel orange, totally untouched, not even the fruit.

[ghar41 201]

Thanks for starting this- I have been growing a few plants of this species for many years. I have had much different results though.

Recently we experienced 10 days in the 20's:

No damage

This first plant has been through many 25F-32F degree nights over the last 5 or 6 years. It has never suffered any visible damage.

I have been so impressed with this that I wanted to test its resilience. I planted another in the least desirable position on my entire lot- an open position facing an open street facing due north- it is always frozen up there. It has never shown freeze damage although it does show some basketball damage. Heat- relentless 100F days, dry, perpetuated by extreme temperatures rising from asphalt. Picture taken today (see above temperatures.)

This palm didnt like having a block of ice that collected and froze in the mouth of the growing spear last year and did cause damage- but pushed right out of it in the Spring.

[Brahea Axel 270]

This is great news, hopefully mine will become hardier as it gets older. Why aren't any of these reports in the hardiness reports?

[Alicehunter2000 713]

A big difference could be that it is in the ground. I had 2 large Bismarkia bought at the same time. 1 I left in the nursery pot in a sheltered carport with blankets during a upper 20's freeze, the other was planted exposed to the sky. The protected one in the pot died deader than a door nail shortly after the freeze. The exposed planted one is a beautiful specimen...probably the nicest one growing in Panama City. I will never leave large potted, marginal plants out to get their roots froze again.

Root/pot or in-ground should be required information for any cold hardy test considerations....as well as plant size.

[Xhoniwaters1 83]

Hey Glenn

Thats some serious cold weather you had. How did your A. cunninghamiana's fair with such a prolonged freeze? I remember seeing that photoslide of your garden, anything surprise you after the cold?

[Xhoniwaters1 83]

3' Parajubaea sunkha newly planted 3 weeks ago. Most exposed part of the yard facing north. 2 nights @ 21 & 27- 30 hours of freezing temps. Covered palm with a grill cover on the first night. Palm has minimal to zero damage.

[Austinpalm 175]

I have a 5-gallon sized Pj sunkha planted between my neighbor and I (approx. 15-feet wide strip) in the spring of 2016 which survived this past winter with significant damage. Spear and youngest 2 fronds were fried. Older fronds survived with little damage. New spear began to emerge in early June. Generally this past winter was warm, but we did have a 36-hr  period below freezing with a low temp of 20f in January. 

This palm gets direct sun during the middle of the day in spring/summer and generally bright light for all other times.

[TexasColdHardyPalms 3,174]

I have three 15G and I am really wanting to pull the trigger and get one in the ground.  One of the 15G lost the spear this winter in the cold frame @ around 22F.

[Austinpalm 175]

On ‎7‎/‎21‎/‎2017‎ ‎2‎:‎28‎:‎32‎, Austinpalm said:

I have a 5-gallon sized Pj sunkha planted between my neighbor and I (approx. 15-feet wide strip) in the spring of 2016 which survived this past winter with significant damage. Spear and youngest 2 fronds were fried. Older fronds survived with little damage. New spear began to emerge in early June. Generally this past winter was warm, but we did have a 36-hr  period below freezing with a low temp of 20f in January. 

This palm gets direct sun during the middle of the day in spring/summer and generally bright light for all other times.

Here is a pic mine this morning.  Not as nice looking as some in the above pix, but I'm just glad it still hanging in there.  This summer has become very hot. I am impressed how with its toughness to this point. For some reason, I can only upload pdfs at this moment. 

IMG_2494.pdf

[TexasColdHardyPalms 3,174]

On 7/29/2017, 10:04:48, Austinpalm said:

Here is a pic mine this morning.  Not as nice looking as some in the above pix, but I'm just glad it still hanging in there.  This summer has become very hot. I am impressed how with its toughness to this point. For some reason, I can only upload pdfs at this moment. 

IMG_2494.pdf

These two will go in the ground this april

[Austinpalm 175]

On ‎7‎/‎29‎/‎2017‎ ‎10‎:‎04‎:‎48‎, Austinpalm said:

Here is a pic mine this morning.  Not as nice looking as some in the above pix, but I'm just glad it still hanging in there.  This summer has become very hot. I am impressed how with its toughness to this point. For some reason, I can only upload pdfs at this moment. 

IMG_2494.pdf

Threw a couple of paper sacks and a giant plastic trash bag over this palm back in December.  Seemed to do the trick as the plant is showing only minimal damage after approximately 24 hrs below freezing with an ultimate low of 20F.   This plant seems to still be growing. Fall/Winter/Spring seem to be the best growth periods for this palm here in Austin.  Have not noticed any damage from heat yet, but the palm just quits growing around the end of May.

[Fusca 1,942]

Here is my ~3-gal sized Parajubaea sunkha as of March 4 following consecutive lows of 9°F and 13°F on Feb. 15-16.  I covered it with a thin sleeping bag which kept it dry from snow but no supplemental heat source.  Roughly 60-70% leaf burn on outer leaves.  Newest leaf and spear are both still green and healthy.   

 

Edited March 5 by Fusca