Assuming the con thinks the female jd is female, no. lol.
Keep an eye on the 6 smaller cons you added. If you see a few specks of orange, expect a pairing and more aggression. Sounds silly, but I've had sub 1" cons spawn. They move very quickly when ready.
I've got jd's and cons attempting to coexist atm. The jd's outweigh the convicts substantially, but don't do too too well with the constant rush by the smaller cons. They grew up in a convict dominated tank, so they're still submissive. They've just recently started to realize showing the smaller convicts they almost fit in their mouths is a half decent deterrent. lol
Best bet with your dithers is keeping the tank well fed. They'll be dithers much longer.
Thought I'd add... I had anacharis in the con tank, it survived for a year or so without help. There's currently a very healthy grove of corkscrew val in the center of the tank. It seems to deal with being uprooted very well. (The bunches are connected by runners that re-bury easily in sand) My jd's do occasionally nibble on it, and the pleco takes after the broken off blades. You might want to grow your plants out first in your 20, and once established, add the overgrowths into your 55. That way you'll have plenty of plants to fall back on.