Ghép bạch đào vào cây bích đào chủ.
https://hoacaycanhsapa.wordpress.com/2013/01/26/cay-dao-dac-biet-bach-bich-dao-sapa/
https://hoacaycanhsapa.wordpress.com/2013/01/26/cay-dao-dac-biet-bach-bich-dao-sapa/