TYVM for the replies!
Those are 4 plants I wouldn't think would be able to get enough light inside, but always eager to learn more info & techniques for 'cheating' mother nature. I'd love to have some Costus!
Deebie, Syringa blooms in April/May up north. It's not cold enough during winter here for them to form buds, so for that reason also, IDK but I think this would make a poor house plant unless one has a freezer to store it for winter.
Brugmansias bloom at the end of summer here, usually frost gets them while they're in their prime. Then they grow back from the ground in the spring. I've taken cuttings to bring inside to get started growing over winter (to increase number of plants in the yard.) In a W window, they were pitiful. Although these would love to stay warm and sunny all winter, being directly adjacent to the best light I had to offer wasn't enough to keep them growing well (but the did stay alive, definitely.)
IDK the other 2 plants, other than that I've never heard of anyone growing Pittosporum as a house plant. IDK if that means nobody tries, they tried & found it unsuitable, or I've just happened to miss conversations about it.
Plants that must go outside for summer to do well don't fit my personal idea of a house plant, saving for winter is different from a permanent house plant, but that is for each person to decide, based on their tastes & conditions, and personal definition of house plant. If I had a sunroom, or an east/south/west wall of floor-to-ceiling windows, I'm sure I could branch out quite a bit more. For better or worse, my perspective has so far been only in an ordinary house with ordinary windows. (C'mon lottery ticket!)
