Many things are just not meant to grow in the tropics. Grapes being one of them. So...finding these grapes finally taking shape in the garden ( not mine obviously ) was a big thing. It was planted a year ago, maybe longer.
A quick internet search tells me...there are three steps to grape growing
1) For the first year and a bit, you're meant to be patient in tending it.
2)You then have to confine their growth. ( They apparently tend to dominate)
3) Find some where of securing / promoting pollination.
Our grapes are sour . Not a candidate for making table wine..plus the great growth ammounted to 4 measely grapes. We were down because the nasty birds got to them before we did. I hope the birds got a tummy ache for their trouble.