Here's my opinion, based on nothing more than intuition, but here goes: I would leave your Pia covered. The fluctuations could prove to be damaging to it and the protective cover will keep it at a more constant temperature. That's my two cents.

That would be my logic as well....The last thing you want to happen is to uncover it, have the buds swelling and then get hit with a frost/freeze which is more than likely to happen yet in NJ. Wait until you're sure Spring is really here or your entire bloom season may be lost....yg

ok--the burlap stays!

I followed some of the adivce from other members on this board, and covered up my hydrangeas.I wrapped them, filled the bag with leaves and placed several of them under a makeshift shelter behind my shed. I covered the whole set up with bags of leaves. I uncovered them yesterdat since the tem was in the 50s. I was disappointed them to see that they looked dead! Brownish and shriveled up. I wonder if it is too early to tell or I did something wrong. The plants were in 10 gallon containers and not in ground.

thanks

bcmouli, I had exactly the same thing happen to mine. Only mine was planted in the ground. I removed the covering same day you did, and I don't know if I waited too long to uncover or if I uncovered too soon. Anyway, if I lost it, I've learned a lesson and will stick to more-hardy varieties in the future.