GA3 is a plant hormone that can be used to force a female marijuana plant into a hermaphrodite to make your own feminized seeds! Now you can easily cross any strain that you want to.
Be sure not to smoke anything from plants treated with plant hormones like GA3, as it may lead to cancer. Those plants are used for breeding only, and the seeds are safe to use!
GA3 is available at https://www.powergrown.com/products/all-products/gibberellic-acid-90-10-gram-kit/