The tag on a Kalanchoe given to me as a gift advised me to throw mine away after the
flowers died but it just keeps on flowering. I have been able to use cuttings to pot clones and give those as gifts.
I kept mine inside at first, but it started getting moldy on the soil, so I moved it outdoors. Maybe that is the difference. I am going to experiment and keep some inside to see the difference.
Indoor
flowers that have worked for me by my bedroom window which gets morning sun:
Morning glories (its a vine, makes an awesome "curtain" for your window.) It does take a couple of months to
flower inside.
Nasturitium (a bushy like vine, very bright
flowers)
Double-blossomed Balsam (Looks a little like
roses)
But my all time favorite indoor morning window
flowers are daisy-like
flowers. There are many varieties. Keep them by the morning lit window in a pretty pot, and when you have guests over you can place the pot in a place of honor on the dining room table. People are always impressed :)
I think if you try what you like and are not afraid of accidentally killing a few plants, you'll have fun experimenting.