outdoor plant? This is a different dynamic. Even canopy isn't necessary as there is no difference in light intensity if the plant is 1' or 50' tall. All you have to do is spread it out as best you can. top it at various points to keep it bushing outward. But, even that may be irrelevant. If it increases surface area of canopy, it'll have a chance to be a benefit.
They do look deficient in nitrogen, fwiw.