Deficiency in Rhopalostylis sapida 'Pitt Island' seedlings, or normal?

[Phil Petersen]

I was hopeful anyone might have knowledge of the cause of length-wise stripes on sub-pinnate leaves, or know if this is normal? Not occurring on all of my ~30 seedlings of this size in a shade house, but maybe 1/3. Otherwise they do seem healthy. I do have palm-specific fertilizer and loads of worm castings so maybe I should apply as in summer now. Was holding off fert on the smaller palms as didnt want to burn in small pots. Any advice much appreciated. 

[Tyrone]

A bit low in nitrogen I reckon. Give them some fish and seaweed for a quick pick me up, and some slow release fert. They’re ready for it and will green right up. 

[Phil Petersen]

I Appreciate your advice Tyrone. I'll get this sorted 🌱