If they are just rooted cuttings you should pot them up in a one gallon pot and don't plant into your gardens until it has roots going down to the bottom of the pot...I did that last year to two I bought that were small so they stayed in pots from May until two days ago..they had tons of roots..they are now planted in my gardens....Hope this helps...Jeanne
ps...put some nice bonemeal in before planting to aid in the roots growing.

Thanks for the info Jeanne. They are presently in 4" square pots, and roots have wound around the insides and are growing out the bottoms of the pots, but they never broke into regrowth last year despite the fantastic root growth. I'll take your advice, and up-pot them for this year.