Nirvana's females are sourced directly from the breeders, ensuring healthy, vigorous, heavy-yielding plants. As long as you're doing a good job at taking care of your babies, they will grow into gorgeous female plants.
To understand why feminized seeds are so popular, you should know that only female marijuana plants can help you to get high. When buying female seeds, you won't have to spend your time removing the male plants, which is an advantage for inexperienced and professional marijuana growers alike.
Besides, feminized seeds are the best choice for stealth grows and growing marijuana in tight places, as you'll only need to grow half of the plants in order to produce the same amount of weed.