It's not entirely clear to me what their license permits at the moment... it sounds like it is more than 4,500 kg, but less than 45,000 kg? Perhaps it will slide upwards, as the build out of infrastructure is completed in keeping with HC criteria?
"The entire facility is expected to have the potential to produce up to 45,000,000 grams per year of marijuana based upon expanding our licensing to the full square footage of the greenhouse."
and
"The license has enabled Tweed to commence growing activities in approximately 10% of the entire 350,000 square foot facility. Tweed Farms will produce the initial crop while concurrently working to expand its growing area and other permitted activities under the MMPR license as issued on August 8, 2014."