I agree to you, that its might be difficult to to topdressing , if you want to bend her like this.
But i would look from a different side
2 Points....as you are growing Outdoors, and sunreaches every small point of the Plant, your Lst, dont have to be so specific like growing under arificial Light
The Plant itself
You need the fitting strain to your Technic. how elastic is the strain you grow, because the " new Genetics" tend to be super Sturdy . I had afew cases and gave up in "big bending"
And another Point,,,,.. maybe alittle Zen...... follow the flow of the Plant,,, if you start binding her, intead of astiff plan. The Girls will be very grateful. aND SHE WILL GROW WAY BETTER