Usually you need to plant it in the fall because it needs to be in the ground over winter. This video might have some helpful tips for you: https://www.youtube.com/watch?v=0O8jk3h5Jeg
Yes you can. Many people plant in fall. Here are some sites to help you out.
if you can dig the ground you can plant,rule of planting "not until after Mothers Day" this is not for frost,snow this is because this time is for sure no more ground freeze.
if you want to be successful, follow instructions and plant in fall. Spring plantings not give garlic enough time.