First off you MUST separate those into their own cups, you can't grow them together, they will grow, but if 1 is male you will have nothing but seeds to show, and if you try to get rid of males then you will have to leave all the roots in the ground and that could be bad as they will continue to steal resources from the others.
Second, soil needs perlite, lots of it 25%-50% of the volume should be perlite mixed in with the soil.
Looks good so far, but anyone can drop seeds in dirt and start a plant growing.