Needle Palm Deficiency?

[OriolesRock100]

Hello, my needle palm new fronds are coming out yellowish/lighter green with only some spots that are the normal dark green color. The old fronds all look okay color-wise. It has grown a lot this summer and even looks to be trying to send out its first pup (see attached pictures), so it seems to be happy otherwise. I think it must be a deficiency - did I not fertilize it enough during the summer? Is it too late to fertilize it now that we could be seeing our first frost this weekend/next week? Looking for any advice because I think I might put this in the ground in the spring since it should be fully hardy here in Zone 7A, so I want it to be as healthy as possible until then.

Thanks for any advice/help!

[Palmerr]

 Too much water? Next yes maybe a deficiency in something like nitrogen, Magnesium, or manganese. Or could be a fungal or Pest problem.  I am just giving my opinion on this i think some of the skilled people need to get on this one.

[SeanK]

It's too late to plant out, so I would just mix some Miracle Grow for it. If you can find a rose fert with some iron, that may help. 

Generally, a palm fert will be slow release, approx 2:1:3 ratios. For now, give it a small kick +minors

[OriolesRock100]

1 hour ago, SeanK said:

It's too late to plant out, so I would just mix some Miracle Grow for it. If you can find a rose fert with some iron, that may help. 

Generally, a palm fert will be slow release, approx 2:1:3 ratios. For now, give it a small kick +minors

So are you saying that since winter is around the corner, I should not give it slow release palm fertilizer and should instead go with miracle grow or rose fertilizer? Just want to make sure I understand correctly. Thanks for your help

[SeanK]

I would just try to fix what's wrong short term. Don't fertilize for growth, b/c Rhapidophyllum needs heat.

[RFun]

I honestly don't think it looks too bad.