Does anyone else find it totally ironic that hell raiser ASR has of all things - gardening - as a hobby? He doesn't come home and shadow box (although I would sooo love to see ASR in that get up and sweaty) or go hunting (the go to past time of all hard hearted men in Hindi tele and filmdom) - these activities also involve no other human interaction. But no - he gardens...like Benedictine monks.
This is what I think about this little hobby and Mr. Greenthumb.
Arnav has needs (no I am not talking about primal things here, I am talking emotional - we can all see that La is always ready to quench that need in ASR
). He needs to take care of something, he wants to nuture something, he wants to turn his attention at the end of a hard day to something gentle and to something that will appreciate his care. Because of whatever has happened in the past to harden him against people and their ulterior motives, he can not and has made it a point that he will not (yes, the man has trust issues) find a person to fill that role - so he turned to gardening. His garden grows because he takes the time to nuture it and attend to its needs. And this is also how his love will grow, when he finally allows that flower to bloom.
The other thing I thought of was that Khushi and Arnav process angst and tumult in their lives the same way. They do not turn to their close ones and discuss - one turns to plants and the other to making jalebis. It's during the pruning, watering, frying and pouring that they work out what's churning in their minds. They really are just different sides of the same coin. (Can you imagine after a couple's fight - Arnav with the tulips and Khushi in the kitchen with a mountain of jalebis...that deserves a split screen