Solution to growing next year...
This is what I would do, Veg your girls indoors until March 1st., get some nice 2-3 footers. Your going to need to make a greenhouse, (PVC & plastic, or buy a cheapo edition greenhouse) then put your girls outdoors into the greenhouse. Use an 8 weeks flowering indica strain to deal with the cold better and to be done by May 1st. That gives you all summer to deal with the wedding stuff, and you'll have a harvest under your belt.
My Mad purps was was WONDERFUL this past May, and was a deep dark purple in color.
https://www.rollitup.org/outdoor-growing/427417-my-nine-monster-story-written-6.html ---post 52, hard to say no after seeing those pictures.
TMB-