If you're meticulous and check every inch of it every day, it can be done. But it's a pain in the ass and if you miss one your whole crop gets pollinated.
Just curious, third week of flowering? I have one outside just like it Sent from my iPhone using Grasscity Forum
well if its the only plant you have growing pic them fuckers and let it finish, i grew a gorilla glue bag seed and picked over 200 dicks off her and finished with 300gs of killer smoke and to date have only found 3 seeds.