Eden can be a very vigorous climber. it also can have thick unbending canes. So I think it would be wise to start training it now and then you would have it shaped the way you want it to grow.Just letting Eden do it's thing could make it into a Chinese puzzle.

Train it as horizontally as possible as soon as possible. Flexible and bendable young canes quickly become like rebar. In fact, young canes will give you a workout, too. Canes can snap when pushed to their limits. I've snapped my share of canes.

Moses

Thanks oldrosarian and Moses! Indeed the canes are not very pliable and are standing up by themselves. Since I plan to bring it indoor this winter I have to get a narrow trellis. It will be challenging to train it on a narrow trellis. I worry that I will snap the precious new growth:)

sb-----ny,

On a narrow, fan type trellis, horizontal canes are not needed. Minimal manhandling will be needed to get canes in place in your case. Probably 3 strong canes are all you need. Two will grow on the trellis's extreme edges, and one up the middle. You may have to fight your grafted Eden to keep it growing in such a confined space. Those fan trellis are often quickly overgrown by most climbers.

My earlier response was made regarding growing a climber on a wide, horizontal fencelike support, hence the need to bend canes horizontally. There's no need for such gymnastics on a relatively small, vertical fan trellis.

Moses

Thanks again Moses! I went ahead and tied a couple of the long branches up today, bending each once and leaving the shorter ones alone for now. So far no new main canes since I got it, but I’ll check it again from time to time. Hopefully it will survive the winter in our windowed basement this year. After we prune the trees a bit in the spring maybe I’ll have a sunnier spot to plant it in the ground!