depends on where you are living? If UK then yes as long as the ground is not frozen and you are able to dig a hole. It tends to be mild enough now to plant without too much problem.
Hi Chris, follow Hawkwalks good advice and I'm sure it will be fine! Larger plants take longer for the roots to establish, I think your better off planting smaller plant/s which will get established far quicker, add some leaf-mould or general compost for good root developement. All the Best Tbird+