If your plant is growing, it could certainly use fertilizer... I am very leery of any non-liquid fertilizer for container palms, though... best and certainly safest to use a liquid formula (Miracle Gro works great actually)- some growers use a bit of it every singe time they water their container palms (daily in a greenhouse) and the growth they get is phenomenal. Most have a system where it is injected into the water line so they don't have to measure/guess or make it up daily. You probably don't have as many plants so could use a regular hose with the liquid fertilizer attachment.. I have yet to hurt a palm with liquid fertilizer, but killed dozens with solid forms, even the slow release 12 month type has killed palms when I was a bit too lax in how much I mixed in.

Thanks!

Today I added some to the king palm. And decided since i have two full containers of palm fertilzer 3 month release type I might has well use them so I added about less than half of a table spoon of that stuff for the coco.

Have you really killed container palms with it? How did they die?

I've used that quite often for my coco's. But I never really gave them near as much as they say. I always feed less for two reasons. I think that the smaller dosage you give the less likely you will burn your plants. And the second is I think they will do better if you add a little bit now and then the rest a while later. So its not like feeding one big meal at one time but more like smaller meals over time. But I dont know if it has any actual benefit though.

- US_Marine

over dosing fertilizer shows up as a plant with severe brown tipping, complete ceasation of growth, followed by root necrosis. Only a complete washing of the roots and repotting in soil with no fertilizer can save an overfertilized plant (worse if in the ground since these plants usually are harder to save). ONe year a very large collection of palms in southern California was badly damaged by over-aggressive fertilization with 12 month slow release fertilizer, to most of our amazement.