On another note:

The size of the clone when it goes outside makes much less difference than you would think. What you do to it after it goes outside will make a FAR bigger difference than how big it was when it went outside. I' did some side-by-sides this year with clones that were 3" tall, 18" tall and one that was 36" tall when they went in. Within 6 weeks there was no difference in size. By the end of the year the 3" clones actually got bigger and yielded better than the 36" clone. I've seen this many times in other gardens too.

Also, if you are in clay soil make sure your holes drain out properly. The problem you can encounter doing what you are thinking of doing is that you can accidentally make a "bog" of sorts because the water will not drain out due to the heavy clay soil surrounding it. Thus the water can end up just sitting in the nice bag soil that you filled the hole with that has such great water retention ability and not drain properly. If you can do it an in ground drain or a raised bed this will help a lot.