It only says in the web the earliest you can apply which is 3 months before travel. How about the latest time i can apply? Would they grant me a Sept 2019 visa if I applied on July 2019???
You can find out typical processing times for visa applications here. Fifteen days is typical for many centres, but you should check your nearest.
Allow extra time for unexpected delays, and work back from your intended travel date.
For best peace of mind you should apply as early as possible, but no more than three months ahead of time. For a 1st September travel date you should apply now.