Source: MMOWTS
In ACNH, it takes a lot of work to get hybrid flowers. Especially if you are looking for flowers that require multiple different breeding sessions.
Green Mum is a kind of flower that is difficult to create. You need to do three steps to create them. But don't worry, MMOWTS will introduce the specific steps to let you get them easier.
How to get Green Mums?
In ACNH, the flower has its own DNA code in the game, which means there is a lot of chances to get the incorrect flower when breeding.
The Mums on your island will have random cross-pollination DNA. If you want to start over, the flowers must be purchased from Leif or Nook’s Cranny.
Step 1: Get 2 White Mums
Some islands will automatically start with White Mums, but if you haven't encountered them, you can use Nook Miles Tickets to go to random islands and collect the flowers you need.
Step 2: Cross-pollinate the 2 White Mums to create 2 Purple Mums
Once you have the White Mums, you need to place them in the diagonal position and water them every day. Fortunately, if you use Nintendo Switch Online, you can invite your friends to visit and water the flowers.
Step 3: Cross-pollinate the 2 Purple Mums to create Green Mums
Once you get the Purple Mums, you need to place them diagonally from each other, and water them every day, you will get green Mums then.
MMOWTS will provide ACNH-related tips and tricks from time to time, you can always check them out here. And you can buy ACNH 2.0 Items you need here, because the 2.0 update brings a lot of new items and content, so this brings freshness to the players. Coming to MMOWTS to buy ACNH Items can make you jump into the game faster.