How do you pass level 5 in pvz 2 (mobile) for plants

[DeluxeLuigi]

Hi I just wanted to know how to pass level for plants in the new power plants update 5 in pvz 2

[KILLER_from_KIEV]

Plants, depending on the maximum level of their upgrade, are divided into 3 ranks: 20, 15 and 10. At the moment in the game it is possible to upgrade them appropriately, up to 12, 9 and 6 inclusive