Its gonna be tricky. I lost one two yrs ago in a pot cause I let it dry out. And being a zone 9b palm they will require more heat than your trachys. Youll probably need to keep it on a thermocube and really watch it. I planted one last week and I really hope I can keep it happy this winter.

I came across my first one , a 5 gallon, friday at a wonderful greenhouse. I was blown away but restrained myself since I don't think it would make it here..this is a zone 7 but still I doubt I would make it. this one they said they would sell me whole sale for 85 dollars but I just couldnt do it. They had a nice trinalge palms 2 but I doubt it would make it either

Personally, I wouldn't try it.
If I wanted that look, and was willing to go all-in with soil heating, heat tape, lights on thermocube, insulated cover etc., I'd go with Brahea, or a silver Chamearops. Much bigger margin of error. Just my $0.02.

I'll Try it... it may fail but hey Am carzy as it is.

teebee, agree with Erik's comments that it's too risky in 5B.
Unless you get some dirt cheap specimens for a trial.

Plus their light requirements are substantial, as can be seen by any in the south that are inadvertently planted in half shade.
Would be near impossible to provide enough heat to the root zone/above ground AND sufficient light in a 5-month winter area.

It'd be my dream to have one planted too.
😕

Barb

Hmmm perhaps I stlll get it and leave it as a deck plant. I my over wintering spot would keep it quite happy. 2x600w MH Lamps running on a 14/10 schedule.

You may be able to pull it off if:

Your protection is flawless,no high moisture inside,you insulate 2' down(at least) with 2"
thick styrofoam and build you protection out to the edge of it and you start protecting
it from moisture(rainfall)in late August....otherwise,the leaves will mold and turn black if there is any moisture
over winter inside the protection-you will also need to leave it covered until mid May and it will need to be kept dry.

So,basically put all your energy into growing one palm...you will also need to amend the soil out and down as far as
the root system you are planning on having can go.

If you fail in any of these it will not make it....one last thing,you will have to plan on success from the beginning
because if the roots are ever damaged or killed back from cold wet soil it will fall into decline(best case)and die.

On a positive note,if there is any palm worthy of all this,it's a Bizzy!

I'd really love to see someone succeed with this in Zone 5.

What an accomplishment that would be...

Barb

I think in a very large glass house is the only way

Yeah, I don't think even Kew has one in theirs.

It's the old story...IF it works, how in blazes are we going to continue as it gets larger?
I'd slit my wrists (kidding) if a big palm finally dies because I can't continue increasing the protection size.
(which reminds me of my Trachy...oh well).

Barb

Tim, so I agree with Jim. That equates to a palm in your yard June July and august. And a thermally protected box in your yard the other NINE months.

I already feel bad about my Brahea armata being in its box the better half of six months. It has been reboxed a half dozen times since early March to protect from any frost. I hope last night will be the last frost until October or November so I can tuck my boxes away. I have also been covering my Washingtonia filifera and pindo and Musa basjoo for these instances of frost. The sabal minor, the needle palm, the silver chammy and the trachycarpus fortunei have been out since mid February.

I suggest this abovementioned work will only be tougher with a bizzy. It really should be potted and moved in to optimal sun.

I found this its sort of interesting.

http://www.thepondoutlet.com/home/tpo/page_2828_286/thermoplanter.html

Its too bad the dont build various sizes of this take a 20 gallon pot and bury it.

Perhaps I build something similar on my own a sheet of copper and and attach heat cable to that and bury it vertically around the root system.

In cold soil heating devices can be overwhelmed....

The thing about Bizzy's is,they get absolutely huge,wide and tall and have very stiff leaves.

Protecting one would be a mission-as I said though,if any palm is worth doing all this for a Bizzy is it.

If you kept the bizzy potted and burried the pot, then heating the soil would become easier. Plus having it potted will slow its growth. I definitely agree a bismarkia is the only palm I would go through this trouble with. Luckily for me I am much warmer and may have better chances.

Barb, how long you got before your standing on top of your house installing protection for your washy.lol