Maybe I was just lucky, but last fall I took some cuttings from a neighbor's Torenia, but I don't think it was the trailing type. I took four, 4-6 inch cuttings, stripped lower leaves and stuck them in ceramic pots with potting soil(two to a pot), set them next to a table lamp, and kept the soil moist, but not wet. I treated them like houseplants, basically. I lost two, and two rooted. Since then I've taken a couple of cuttings off of the two that rooted and grew. Once they had new growth, I fed them lightly like I do my African Violets. They started blooming quite small, so I've been pinching off the buds until they can go outside. They're not huge, but they're something to start the season with. I've just started setting them out in the shade on nice days(few and far between right now). I've never grown them before, but I couldn't stand the thought that my neighbor throws out her plants every year, so I thought I'd save some. I even overwintered a fibrous begonia in a hanging pot that she was going to toss. It's been pretty sad looking, but is starting to perk up. I've taken some cuttings off of it, too.

Thank you both so much for responding! I'm going to have another go at it and this time I'll use good potting soil almost up to the leaves, place the cuttings in bright, indirect light, and cover them in the rubbermaid container. Thanks again!

roselane, one more suggestion. Do not use the potting soils that have moisture control or moisture crystals in them. they will stay TOO wet.

AND when you drain your freshly watered pot, set it on an old towel 9 (that is relatively clean and dry) and let the excess water wick from the pot (takes 10 minutes). This way now your soil is moist but not soaking. I do this with most of my plants during the winter and spring and fall, I guess with summer heat it would use up the moisture quite quick. But if contained in the rubbermaid, I think my method would leave the soil damp enough.

I just bought a little fuschia cutting from the store, and they had watered them, the pot wasn't dripping, but I'd read fuschia's do not like wet, they prefer moist. So I wicked it on 2 paper towels (previously used from the kids at supper, they barely dirty them, so I use on the plants for wicking), I could not believe how much moisture I got from that little 2 1/2 inch pot.

Thanks so much! I now feel that one of my primary mistake on one of my tries was potting it in almost pure peat moss and then being sure to keep it really wet. I even had the pots on wicking fabric to make sure they stayed moist. What was I thinking??? :)

Trust me. We all learn from experience! For every success, I've probably had two (or ten) failures!

I am in the Dominican Republic and it is May 34c and humid. For the first time I found just one Torenia plant. Not knowing anything about it I put it into some gravel, sandy earth in the border, where it gets full afternoon sun for about 2 hours(this is hot tropical sun). It gets watered about every 3 days so it dries in between. Ive taken cuttings and stuck them in a pot around the edges and all have roots within a week. With so many cuttings ive tried them in shade and blistering sun. They grow just fine. Not tried growing the seed as yet but have taken pods off and thrown them on an unused pot of compost.
So.. its the heat they like no matter sun, shade or potting mix.
Possibly the humidity helps.