Palms turning brown

[Arriettyborrower]

i have recently had some palms planted in high planters in the garden, they looked great to start and I have fed them palm food as per instructions, however they are now turning brown at the tips.

Having googled this is either over or under water? But I don’t feel like I’ve done either. I have one palm in a pot which is thriving so is it the soil?

Just bumping this post and hopefully adding some pictures

It's either the sun or the wind, or possibly both, and it's likely that they are underwatered rather than over.

If they are in new compost they won't need feeding as the compost will have all the nutrients they need for at least a couple of months. Giving too much feed is detrimental to plants. Think of plant food as a vitamin & mineral supplement. It isn't food - they make their own food by photosynthesis. Plants don't need food like we do.

Are you in the UK? The first two pictures look like indoor palms to me given our climate. I have a Kentia palm that looks exactly the same. It doesn't like direct sun and wouldn't cope well with the temperature variation we get outside - I nearly lost one indoor plant by leaving it out in June when the temperatures changed dramatically over a day or so.

If they are Kentia palms then they won't survive the winter outdoors.

The third one is definitely fine for outdoors in the UK.

Thanks for your replies - sorry I missed them til now.
The landscaper planted them, I was concerned that they wouldn’t be very happy and the spot is a bit windy too. He also planted them in the existing soil rather than using compost which again I wasn’t happy with.
I will try giving them some more water but fear they are not going to be v happy at all.