As previously stated it is not ideal to grow more than one plant in a single pot. You may be able to get away with it if you keep them small but why risk it? When plants compete for root space and nutrients, and they will, you may not see the effects until later in the plants life and you don't want to lose a plant in full flower when the other one strangles it to death with it's aggressive root system. If you are going to transplant definitely break them apart carefully and put each one in it's own pot. Don't risk keeping them together. My 2c.