Tweezeranswered grow question a year ago Hey now, you can absolutely grow an auto flower in an 11 liter container. I would put the strongest seedling in the biggest container. I would not recommend placing two plants in the same container though, some people do it for fun, but it will hurt your final yield. The reason is that both plants will be competing for root space, nutrients, and light. Their roots will grow tangled together, they will each rob the other of nutrients and neither plant will even come close to their full potential. Good luck brother!