SM trailers can grow very large. You can pot them up to the size that looks good to the eye because they can be very different.

Some trailers are grown in 3 inch deep saucers, ten or twelve inches wide. Another of the same variety may be grown in a four or six inch pot. It depends on the size.

Nancy

Yeah, what Nancy said.

With trailers, size (such as standard or semi-mini) refers to the size of the leaves; the plants themselves, because they have multiple crowns, can grow as large or as small as you wish, depending on how many crowns it has; I have a standard, Sweet Cheri Trailer, that I just put into a 6" hanging pot; you can put them in shallow plastic saucers, the kind you put under pots, and grow them as a sort of ground cover (sounds like what you're doing) or in hanging pots and let them drape and just get bigger and bigger...

Korina

'The first sign of maturity is discovering that the volume knob also turns to the left.' ~Anon

Korina
How do you manage to repot hanging violets with out busting up the plant? Each time I repot them in the 3 and 4 inch pots they look rough for a while. Maybe I just need to get more gentle hands. I will try this but am afraid I will have to almost start over each time the soil mix needs renewed. How often do you repot your hanging plants, the same as the rest? Can you post some pics of your larger plants? And hanging?
Thanks

Dustin

Very carefully. I've only done it once; so far so good. It's only been a couple/three weeks, and with the change of location, it's still saying 'Aaaaah! Urg! Ick!' I mean, it's still adjusting. :-P

A hanging African violet is still an African violet, so it needs repotting the same as any other. It mostly depends on the size of your pot. My 6" pot will (I hope) last a year or so before it needs repotting. I hope. This is assuming it doesn't just decide to die.

Korina, soggy and pruny in Nor. Cal.