She'll bend just fine, a little each day or two......had this problem with my present backyard grow, mine were 5' when I started, stiff as all hell, yet they bent over, it just took some time. Funny thing, once I got the main stems over, the branches took off, I tied those down, now the branches of the branches are topping the 6 & 7 foot marks, and I have the same fence issue.....since I'm all legal, and medical, I finally decided screw it.....when I broke a branch and had to effect a repair, which healed up just fine in a couple of days.
Just be nice to the stem where you attach the tie, don't choke it too tight!
Good luck, she looks good!