It’s time for an intervention.
A mint-ervention, if you will.
Look. The Moroccan mint is just a mess, and it’s all my fault. It’s just not mint tea weather, so I haven’t been picking as much as I should. (Never got the hang of iced tea I’m afraid)
The Chocolate peppermint’s problems are not my fault.
Oh boy it’s scale! One of my least favorite pests.
The only solution is to cut it back, and drench it in horticultural oil. And then keep doing that until it springs back.
The Moroccan mint got a drench too, and I’m fertilizing it and babying it and hopefully it will have some new growth I can take cuttings from so I can refresh the plant.
The constabulary is over-interested in my roman mint. This is a sign of white-fly. The other sign of white fly is, all the white flies. Ick. I’m loath to spray it down while the ladies are visiting though, so I’m hoping they’ll take care of business so I don’t have to.
I think my pineapple mint has gone past needing rehab into needing a hearse. Well. It served me well and gave me many cuttings and much tea, so I suppose it was bound to happen.
Luckily I still have one of it’s clones. And this guy is super duper robust and healthy.
Tada, meet pineapple mint, son of pineapple mint!
They grow up so fast.
Now my strawberry mint looks like it needs an exorcist, but it’s fairly healthy, just needs a trim. It’s interesting which mints tend towards the buggy and which tend to repel them. Peppermints seem more vulnerable than spearmints and pineapple mint (a sub variety of apple mint) seems to be the most resistant of all.
Anyways, the mint-ervention is ongoing, and I have high hopes for them all.
I will never apologize for a pun.
The Neanderthal Gardens 
Wait; what? Scale? It is unclear in the picture. They look like whitefly to me. Well, the cures are the same. I cut them back to the ground and remove all the debris. The debris might have cooties. However, I probably would have done the chocolate peppermint just like you did it, to leave some of the good foliage to help it recover. It may need to be cut back more later, but it will let you know.
yeah the chocolate peppermint was a gift so I’m pretty determined to save it. The only reason I’m sure it’s scale is that I brought in a sample to work and our CCNPs diagnosed it for me!
So, it doesn’t move? They are disgusting creatures if you get acquainted with them. They are like whitefly or aphid that live under their own poop.