You have to be ruthless in trimming bunches when they are small. trim out most of the small grapes with scissors. Make sure they are in full sun and prevent shading of the bunches by too much foliage. If the vine is young you must limit the number of bunches to under 10 until it has developed a good deep root system. Also water copiously in hot weather.
no, there is no secret to growing large grapes, and plant hormons is not good for us to eat
You would need to start with a large breed of tomatoes, give them enough water, and use plenty of fertilizer.
the art of growing grapes
Grapes.
spain
Vineyard
Grapes are grown on vineyard.
Temperature over 50 degree should be maintained for growing of grapes.
in Peru and in Chile they grow grapes and apples for export.
They will be ready when the grapes turn red.
The most usual collective noun for grapes is a bunch.
Mormons
Must do - Chilean wine is growing in popularity
It's known as viniculture.