Wounded beast

I received it on a Christmas and kept in warm room (22-23 degrees C(73 F)all day and night) but with a little sunshine, till march when I planted it in this location on a photo. Unfortunately few days after planting I had -7 C (19 F)
and despite that "protection" 
the plant has some burned leaves (that one outside plastic folio).
The last 3 spears are weak and are not stunning but are falling down(they are alive and green now, when planted were yellow, I feed it with Fe so they changed in green), just weak. Hope next weeks it will go better with the cooling and the sun...
My last frost was on a 15 march(or maybe 17th, have to take a look at the station archive). Till 10th of april have another 3 days with a 0.7, 0.9 degrees C (33.2 - 33.3 F)but still no air frost. In lower parts of plains of course, there were some light frosts. But that's all, now we have may temperatures allready, few degrees above april norma.
This is my favorite palm, Jubaea Chillensis
Very beautiful plant)
Purchased some dozens of mini-coco-nuts and planted in pots. Now I'm waiting them to sprout

Course, I know that have to be very patient