Queen Palms overgrown in container not doing well

I bought a number of 24" box queens but they were overgrown for the box to about 20-25 foot trunks. They were beautiful when they arrived from the nursery. We planted them with my landscaper with some jypson(sp) and palm planting mix. Since then every tree has lost at least 4 fronds turning brown and more stil going. No yellowing. Over the last two months I have put on some Vitamin B, and Super Thrive a couple times. And recently put on some palm fertilizer. Been watering them a few times per week. Any suggestions to help stop these fronds from turning brown and dying? Thank you very much.

This is an answer from Phil Bergman of Jungle Music Palms and Cycads:

I just saw this question about newly planted palms trees not doing well. Trunks that are twenty to twenty five feet in a 24 inch box would be enormous for that box size. Such a tree should be in a 48 inch box. So, I suspect they were heavily rooted into the ground to get this big in a small box. This means there was root pruning when you bought them (most likely). So, you might be seeing what you could have predicted would happen. That is, that lower leaves would die off because of transplant shock. Just water them heavily and they'll probably come out of it. But, there's a chance this could put a chronic stress on the trees. Sometimes, bigger is not better in the palm world. This might be an example of this. Queens are so fast and aggressive that even a 15g will be huge in five to ten years if given good care.
Phil
Jungle Music Palms and Cycads
450 Oceanview Ave, Encinitas, CA 92024
www.junglemusic.net
619 291 4605