Aubergines: how often to feed?
 

I've grown some aubergines, have a book (The Vegetable Expert D.G. Hessayon)
that says use liquid feed with each watering and pinch out growing point
once they're 12" tall - the packet doesn't say anything about pinching the
growing point, should I do this? and use feed so often? the variety is
MoneyMaker F1. know nothing about gardening, obviously, TIA