How broke is broke? If it broke off then no amount of vaseline is going to help. If it's just bent and a little ripped then I'd let it be and see. I just over bent one of mine while weaving it through the "screen"...and it appeared bad... leaves wilted. I just let it be as the stalk was still resting on the screen to hold it up. Today I woke up...and the stalk and leaves were all perked up and back in the business of growing.
If you don't have a screen... prop it up with a stick and let mother nature do the healing.