Legalization opponents have appealed, but time is running out.
A delay by the state contractor hired to validate signatures may result in the legalization measure not appearing on the ballot.
Advocates came up 10,000 signatures short in their bid to put medical legalization before voters.
A measure that would legalize marijuana for adults and seal criminal records of certain cannabis crimes is set to appear on November's ballot.
Supporters of legalizing medical cannabis in Missouri have turned in signatures for two ballot initiatives that would let voters decide the issue.
One patient advocate said she applauds the state's recent move to regulate the sale of cannabis oils but that most of the legislation is hollow.
Voters would have another chance to weigh in on legalizing marijuana in Arizona under a proposal in the state House.
Proponents would need to gather and submit at least 13,452 valid signatures to get a proposed measure on the 2018 ballot.
Coalition members say they're done waiting for lawmakers who rejected proposals to pass a broad medical cannabis law three years in a row.