I am growing three willows from cuttings and the growth is coming along very well. I am wondering what are some great indicators (color, height, length) that it is time to wire for form if anyone can lend some of their own experience with wiring. I am a beginner but I love growing and my plants are healthy and I'd like to keep it this way. Thank you!

are you growing an actual; weeping willow? Or a regular willow that you want to wire in a weeping form?

In any case, one can wire branches as soon as they are there. I wire my deciduous trees in early spring before the new branches turn woody, and unwire a few weeks later. Then I let them grow, trim back at the end of spring and do the same thing once more. That I let grow till fall. In fall at leaf drop I normally try to trim and wire once more.

All dependent on how the individual tree responds.

Do not wire trees that are still rooting. Only wire established plants (Repotted is fine)

Very informative. I truly appreciate your response. They are actual Weepers. Here's what they currently look like.

That looks great. I hope you get the answers that you need.

I have 4 just like yours that are doing great. I'm new to this so I have no advice but Update when you can and we'll watch our bonsai grow up. Best of lu ck!

I am surprised noone has said this, but the trees belong outside. They will do much better there in the summer and when winter comes they will get the dormant period they need.