Huglekultur with palm fronds

I live in an urban part of LA and there aren't any readily available. However there are palm trees everywhere. is there any reason I shouldn't use palm fronds for the bed? I also have a ton of used forklift pallets. Should those be fine as well?

I had a quick google search and found these websites:
http://permaculturepathways.blogspot.com/2009_05_01_archive.html
http://backyardpermaculture.blogspot.com/2009/08/sheet-mulching-fruit-trees.html
http://www.palmtalk.org/forum/index.php?showtopic=17667

The last one is the most useful I believe, it says that in a arid climate it will be difficult for them to compost down. So you really need to either burry them slightly or keep them moist, perfect for huglekultur I'd say!

Good luck!