Hi, are these good placements for my king Palm in zone 9a they are triple King Palms and I will offer some protection in the winter, but I was hoping if my microclimate  can offer the most protection we get low 20s here in Lancaster, California this winter we got to 24° the lowest

I think cunninghamiana gives a few degrees of cold hardiness better than alexandrae.

11 minutes ago, SeanK said:

I think cunninghamiana gives a few degrees of cold hardiness better than alexandrae.

Is it cunninghamiana 

It is Cuninghamiana, no silver underside on the leaves. The cool hardiness is better but 24f is quite cold for Archontophoenix. Harry

I have two solitary cunninghamiana on the east side of my house.  Last winter was there first winter in the ground and I wrapped them in mini Christmas lights.  No damage at 27°F and I don't plan on wrapping them this winter though since I have a few new plantings that I might need to protect.

58 minutes ago, Fusca said:

I have two solitary cunninghamiana on the east side of my house.  Last winter was there first winter in the ground and I wrapped them in mini Christmas lights.  No damage at 27°F and I don't plan on wrapping them this winter though since I have a few new plantings that I might need to protect.

Okay I’ll do the same and if I gets under 24 this year I’ll put a blanket

1 hour ago, Harry’s Palms said:

It is Cuninghamiana, no silver underside on the leaves. The cool hardiness is better but 24f is quite cold for Archontophoenix. Harry

Yeah I’ll most likely protect it with a frost blanket 

A heavy frost at 32°F to 37°F will often do quite a bit of damage to the fronds so these palms are best situated under taller trees which act as a “roof” preventing frost from forming on the leaves in colder climates such as yours. 24° with frost is a death sentence. A dryer 24°F is survivable with more mature King palms.