Don't cut them like that. The only growing point on that palm is the top (terminal bud) of the trunk. The foliage appears in the center. Removing that foliage is not good and won't prevent upward growth as new leaves are produced from the center. Perhaps if they are too tall you can find a grower or landscaper who would dig and remove them and replace them with smaller ones as the larger ones are worth more!
Needle palm is smaller and more clump forming. It is also more hardy.
Thanks for the question. Please stop in again soon!
Q&A Library Searching Tips