Variegated Washingtonia Needs help!!

[PlantMami23]

Hiiii,

I have quite a large variegated washingtonia palm, 2 in fact. Both were repotted into 30 gal containers from 15 gal late last year with a soil mix that I put together myself. If i can recall correctly it was a blend of Pine Bark Nuggets, perlite, sand, fox farm ocean forest... 2:1:2:4 

One of the palms seems to be doing okay but could be doing better has only pushed about 4 leafs since winter and the other one has no longer put any new fronds out. It looks to be dead as there is no longer any green left anywhere.  They both receive full sun and get watered atleast once a week. I am located in Houston zone 9a. I am a renter so planting into the ground is NOT an option. 

I'm thinking of doing an entire new repot with a new soil mix, but there are so many different mixes that people create and use... So i'm a bit lost on what I should be doing to help these have a better chance. 

Here are the main questions:

- Soil Mix recs based off of my climate?

- Watering Frequency?

- Fertilizer or root stimulator recs?

- Proper trimming advice?

- Should I relocate to a shadier spot?

- Proper pot size? Depth?

- Proper way to pot?

- Preference in pot material such as terracotta? Plastic? Bags?

 

I could use all the help I can get!! I want to save my precious palms as they are the most important plants I have out of my 1000+ plant collection  TIA!!

 

 

[SeanK]

Water 3x per week April through November 

[wimmie]

Photo? Never seen a variegated Washy!