The Drug Enforcement Agency (DEA) usually wants to limit the amount of marijuana being grown since that's sort of their whole reason for existing. But apparently in 2019, the DEA wants more cannabis.
The DEA says they would like to quintuple the amount of marijuana the agency grows for research from 1,000 pounds in 2018 to 5,400 in 2019. The DEA says this amount "reflects the total amount of controlled substances necessary to meet the country’s medical, scientific, research, industrial, and export needs for the year and for the establishment and maintenance of reserve stocks."
There is a major issue though with increasing marijuana production to that level. Since 1968, the University of Mississippi has been the only facility authorized to grow legal marijuana for the federal government. However complaints about how long it took to receive cannabis from the university led the DEA to seek other universities and institutions to grow their weed. But Attorney General Jeff Sessions has refused to allow the agency to consider any applications.
So either the already slow University of Mississippi will need to quintuple it's production of marijuana, or Sessions will need to finally get off his high horse and allow the DEA to consider other places to grow it.
When it comes to other drugs, the DEA is actually decreasing the amount it will produce for research. Specifically, they will produce 10 percent less opioids for research in 2019 because they believe it's less likely those drugs could be diverted to public.
Now, someone would probably say, "Wait, people are actually selling the opioids made by the DEA to the public?" But apparently we're just going to ignore the fact that the DEA is worried about people getting high on their supply.