I managed to lose track of this question at the time.So how flexible in climate terms are various australian species of nicotiana used in ttl's pituri? Would it be possible for them to be used to create a plantation culture in various dryland/desert subtropics or tropical areas?
TTL's kunudri (pituri) doesn't use a species of Nicotiana, although Australia has plenty of them. They use Duboisia hopwoodii (common name corkwood). This plant can be used in dryland or near-desert conditions. It wouldn't cope too well with high rainfall (too much risk of rots and flooded soils). Somewhere like Egypt would actually be pretty much perfect, since there isn't rainfall and irrigation can be managed from the Nile. But subtropical, mid to low rainfall regions or arid regions with irrigation would probably be best.