Is it bad to smoke marijuana before spinal fusion back surgery?

I am having very serious spinal fusion back surgery in a little over a month. The surgery will fuse many vertebraes in my back, because I have progressive scoliosis. I am well aware that consuming tobbacco products are bad to use leading up to this surgery because it impedes the ability for a healthy recovery, because of nicotine. Does the same go for marijuana? Is it bad to smoke marijuana in the time leading up to this surgery?