Vitis species

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Grapes_19062011DS_SN4: Attached is the image of grapes from my roof garden - Kolkata. The vine fruits after 6/7 years. Before that only 1/2 bunches appeared for 2 consecutive years- then last 6/7 years there was nothing. Suddenly this year I got 5 bunches.
Can any body suggest how to take care of this vine at this location - it is not native to this place.