Tea is grown at elevations ranging from 1400 to 2000 metres above sea level.
Information from Wikipedia:
https://en.m.wikipedia.org/wiki/Temi_Tea_Garden
Also seeThe Temi Tea estate was established in 1969 covering an area of 177 hectares (440 acres). The lie of the land shows gentle slopes that originate from the Tendong hill range.
Tea production in this estate has been switched over from conventional method to 'Organic Method' according to the guidelines of the Institute of Marketecology (IMO) of Switzerland. This conversion initiated in 2005 is reported to have been completed. The change over has involved use of organic bio-fertilisers such as cattle manure, neem cakes and vermi-composte manure replacing the chemical fertilisers used in the past
http://www.sikkimtemitea.com/about.html
Based on my limited experience with teas from Temi, they appear similar to Darjeeling, with low oxidation first flush and higher oxidation second flush. Cultivars seem to be derived from cuttings sourced from Darjeeling. The cost, generally, appears to be more friendly than Darjeeling for essentially the same kind of tea in a very comparable environment.