50s are fine, Mine are just breaking dormancy outside, some days are in the 30s, some in the 70s, and we will probably still have a frost or two.
However, if the plant has been in side it will be very tender. Protect it from excess wind at first. Even though it wants a lot of sun, adjust it gradually to more sun over a period of a week or two, else it will sunburn. If you put it in a protected spot, like against a south wall of a house, it may actually be much warmer than the ambient air temperature.