You can plant 100 of the same seeds. And half will grow much faster and bigger . The others no so much . Or a smaller plant could yield a shit ton more then a massive big plant. Nobody answer your questions for you . I Have to say nope . Its just how it wants to grow slow . Some strands just grow more slowly then others as well . More commonly they all grow just as fast if they all have the same amounts of sativa or indica in them.