Check my posts on this link, i just recently went through LMG which is one of the only companies that do med grow insurance.
https://www.rollitup.org/t/house-insurance.1029386/page-2
Be prepared to be fucked in the ass excuse my language but thats what will happen, most likely 3-4x the cost of your current policy. Even tho weed is legal there is still a massive stigma with insurance companies. Most wont even insure you if you are growing 4 legal plants. I called my policy holder under another name and asked them and they just said we dont allow any cannabis plants with our policies. Too late now but you never ever mention cannabis to your insurer, its like a red flag that will go up and they will cancel your policy at the drop of a hat. So much for legalization