mommyhen..................any Marigold plant can be used....
I have 4 different kinds here by me and they all do a great job.....
No problem !

Edit : (after thought)
I don't know your varieties there in the States....but they should be the same...I think ! ? ? !
If not, maybe use it by seeping it for longer and possibly not diluting it.
Add, like the others have said.... chilly... ! ! ! Just try.... something has to work>
All the best.