I am interested in vegetatively propagating approximately 6-month-old open-pollinated Rhodiola rosea plants, and I was wondering if anyone knows of an effective way to do so with relatively fast results. In addition, I would love to hear any suggestions about achieving uniform plants size-wise, as this would also be very desirable for my project!

Suggestions about any other method of obtaining clonal Rhodiola rosea plants fast would be much appreciated. 

Thank you!