Enough for washie/phoenix growth?

[CroToni]

Next 10 days max. temperatures  during the day 74 degrees ,min 39 degrees(one night)

[sonoranfans]

soil temps over 65 are best for growth.  with these two hotter is better.

 

[PalmatierMeg]

They will probably put on some growth when temps are above 50F (10C). They grow faster when days are hot and nights are warm.

[sonoranfans]

I would suggest a filibusta(filifera x robusta) for your region.  the filifera pretty much stops growing in winter in Phoenix.  this is a palm that grows to 30' overall from a 2' 15 gallon in ten years in the desert heat when it gets water and feed.  they are notably slower in more humid climates and/ or if the heat drops off.  Some think they are slow even, but that is not the case in the Phoenix AZ dry desert heat.  Filibustas can have impressive growth in florida heat and humidity and can have pretty thick trunks (2'+).  Continually wet roots in winter have killed off many filifera and will slow their growth substantially due to root die back.

Edited November 9, 2017 by sonoranfans