Coffee in India is mostly produced in the south. Tea is produced both in the south and in the north in Darjeeling, Assam etc. The best way to travel is by train if you have the time. It is very inexpensive and you can see a lot of the country. Some of the temples and palaces are worth the time and effort.
I made a two-month back packing trip to south and north India visiting the coffee and tea farms and the wonderful architecture of palaces and temples.