Cam, my advice is that they overstating their use, 3 is too much for what they would call a tomato.. if you are going to try it with regulars instead on minis I would steer you off Jap Black tr. Hearts toms often have very sparse wispy foliage that lookls like there is something wrong with it, this may be a problem as you may think it is the pouch.
Of course having said that an experiment is always worth it.
Blondkopfchen..stunning little yellow fruit would look great with your sweet Million
but you choose, I would love to see how it goes.
Good Luck
XX Jeannine