I don‘t have changed my enviroment. Last time I popped seeds, I got 8 males out of 10 plants. This time I got 10 females out of 11 plants...
I have not read any experiment, which was big enough, to proof such a statement, as plants wouldn‘t be determinated way before sexing, or even seedling stage.
It‘s also wrong, that all humans are female in the beginning. They are EMBRYOS! Universal Beings! Sexual appearance like dick and tits will express later, yes. Same for our plants! But the information is already inside, what will be expressed later.