Por que mis flores no crecen?? puede ser por la temperatura o algún otro factor?

Hello friend in my opinion it is due to the genetic. I looked your diary and your plant is nice and the buds too but maybe the temperature is too low. The cold can block the flowering or slow it and i can see you just have 20°c during the day. Try to increase the temperature it will helps your plant. Finally with my experience with purple genetics from sweet seeds the buds are smaller than normal green genetics. So don't worry too much increase the heat and see after. Good luck. Bye