It’s the official guidebook released from Nintendo so very reliableHow reliable is this guide is it official? Because it’s impossible to get a blue rose short of a generation 4 flower and green mums are at least a generation 3 flower (seed bag flowers are generation one a orange from red and yellow would be a generation 2 etc)
source: https://docs.google.com/document/u/...Am4fOpNvCs/mobilebasic#heading=h.jf6m8ytck64a