Chamaedorea cataractarum cat palm problems

[Beachpalm]

See attached pictures

They were moved outdoors from a sunroom that had 4 to 5 hours of filtered eastern light in northern maryland 2 months ago.  We had a mild April.

I moved them to the south facing property of the house and they received 8 hours of full sunlight and either from not fertilizing them this spring or the direct sunlight I lost several fronds that turned bleach white.  A month ago i moved them to the east of the house that only gets morning sun til 1pm then shade all day.  New growth is vibrant green and I have fertilized with palmgain 8-2-12 and Magnesium sulfate.  Still seeing subtle browning of fronds like in picture.  Is this still too much sun?

Now only a few fronds have black streaks in them.   I have since pruned the white fronds and some of the blackened fronds.   Good thing is that there are only a few black streaks on fronds, no more white fronds at all.  What might be the black fronds cause?

 

[oasis371]

Chamaedorea are understory palms, and don't need much direct sun if any.  The bleaching you saw was from the sun, not fertilizer.  Even in a northern exposure, you plant is getting MUCH more light than it got indoors. I get my own Cat Palm in an island planting of Hemlocks, so it gets only occasional dappled sun. It should recuperate once it acclimates to the outdoors, and it will. Remember too, this species LOVES WATER!

Good luck!

Edited June 7, 2020 by oasis371
grammar

[Jim in Los Altos]

Keep you C. cataractum in full shade and it will dramatically improve. 

[Beachpalm]

Thanks !!!!!