let's play the game of one gots to go

choices og kush,sour diesel,chem 91 which one gotta go?

How close are the Sour Diesel to the Chemdog? Are they similar in taste or effect? Which one is better?

I'd probably keep the OG and better of the other 2.

kill the weakest one

I'd cull the OG.

OG IME grows viney with shit harvests.

kill the OG no need to keep that old gangster around

Unless you have a strong preference to a particular strain i say always cull the weakest looking plant.