OK, here are some thoughts:

1. Unless it's in the tropics, plumeria goes semi-dormant in winter; you're best off keeping it bright and on the dry side, and don't panic if it drops a few leaves. Come spring, as the day lengthens, increase water and fertilizer -- it'll bloom fastest with tons of sun, H2O and fert.

2. You don't say which jasmine -- if it's a sambac, it could very well bloom this winter if it's in a bright southern window. Warning! Spider mites love jasmine in winter, so wash off the leaves under the sink or shower, and try to place it near a fan or other cool, moving air (not near a heater!)

3. Same thing with the clerodendron; hard to say depending on the species -- some bloom nearly all year, some only in winter, some only in summer months.

Hope this helps!

Jim