[Arid_gardener] Question from Home-Hort WWW page

[sylvia.doerschel at cox.net]

Sylvia Doerschel
85383
sylvia.doerschel at cox.net

We have a pineapple palm (phoenix canariensis) which is developing yellowing on the tips of some of the bottom fonds. 
The new growth on the top looks very healthy and it is a deep green.  

The plant is about 16 months old. It has grown about a foot and half in one year. It is probably seven feet tall. It is in the front of the house so it gets sun all day long.

We water it twice a week for 2 hours.

I am wondering if it has a disease or if it is being overwatered.

Thank you for your assistance.

Sylvia Doerschel