Ailing Phoenix roebelenii

[succlife]

One of my tri-Phoenix roebelenii is looking sad. It is drooping and new growth doesn't look good. If you compare to other 2, their new growth is reaching up, the one is front is drooping down. Doesn't look like it normally does. What does it need? Please help. Thank you.

[JohnStraz]

Make sure it get plenty of water, fertilizer and sometimes these things can be boron deficiencies

[Johnny Palmseed]

My first guess would be not enough water. From the picture, it looks pretty arid there but I’m not familiar. Roebeleniis prefer wetter conditions but can survive with less. Also, you can mulch to help with water retention. It looks like you don’t have anything but straight up dirt.

[Kim]

Agree with the above comments. Also examine the leaflets closely for any tiny sucking insects such as aphids, mealybugs, spider mites. 

[Merlyn]

I'd think a good dose of balanced palm fertilizer and some additional water would help fix it.  It's hard to say from the photo, but you could look over the descriptions of common nutrient deficiencies here: https://edis.ifas.ufl.edu/publication/EP273

In particular photo 30 looks a lot like your Roebellini, with several spears that won't open up.  Desert areas can have boron deficiencies if there isn't enough rain, irrigation, or decomposing plant matter like mulch or old leaves.  The other two palms in the triple look like they have browned tips and yellowing typical of a Potassium deficiency and Manganese deficiencies.  A common recommended fertilizer is PalmGain that should have a good balance for your Roebellini.

https://www.bgi-usa.com/palmgain/