I bought a baby pine tree after christmas. It did not come with any instructions for care. I have watered it sparingly and it is wilting and a few of the needles are turning brown. It is obviously not doing well. I have it outside. It has been in the 40's and 50's. Help! How often do I water? Should it be outside right now in the winter?

There are many different pine trees. Some that are indoor plants only. First go net try to find tree that looks like yours. But to get it to survive until you find out type. Re-pot the tree in miracle grow potting soil. Only give water when soil is dry. Place indoors and don't let freeze.