Actually, I grew up on a tobacco farm. It takes the plant 3.5 to 4 months to reach maturity. I’m not exactly what tinkering they do with the plant beforehand, but I can see problems with growing a 5-6 ft. tall, 4 ft. diameter (at the bright leaf) plant in hothouses. What part of the plant are they using? (Leaf, stem, root, all?)
[Tobacco can’t be the main bottleneck since it will be spring for next batch.]
They grow trees inside of some hot houses. So no problems there. As for the part that’s harvested, no idea. Found this:
ZMapp Ebola Drug Production Set for Texas, Possibly North Carolina
http://www.xconomy.com/raleigh-durham/2014/09/30/zmapp-ebola-drug-production-set-for-texas-possibly-north-carolina/
” ... A Kentucky subsidiary of Reynolds American grew the tobacco plants that made the monoclonal antibodies in ZMapp. Robinson says BARDA ...”