Do not use any fertilizer yet. They get all the nutrients they need from the seedcap still attached. No need to give additional fertilizer until they have two or three strap leave and even then a very weak feeding is recommended.

They don't need much direct sun either. Most palms sprout and grow underneath protective shade of parent tree or other shrubs. Filtered or indirect light is best for now. And in your climate I'd probably keep them inside until the spring, especially if you're seeing temps in 40 s.

Thanks good to know, however I am growing them inside and thed to keep them inside until the mature enought for me to transplant outside my yard. Because the winters here are harsh so when It comes to that time I will definitaly Ask for advice and help for winter protection. until then ill keep posted on the progress of the palm seedlings. thank