Update on the soil rug indoors dormancy bug:
Here is what it looks like when you replant after a prior plant went barren, on soil rugs indoors in the winter.
http://i564.photobucket.com/albums/ss84/amjoie/dormant_zpsc1cbb621.jpg
But, if you go to the main menu and back again (or quit and restart your game), this happens.
http://i564.photobucket.com/albums/ss84/amjoie/aftermainmenuplanted_zps0744d006.jpg
However, these crystal plants stay dormant no matter what you do. (In the same room, I have grape vines of several types all growing normally after going to the main menu and back again. So the crystal plants should have started growing again, too, in this location.)
http://i564.photobucket.com/albums/ss84/amjoie/crystalsdormant_zpsae358965.jpg
From seeing how this operates, the soil rugs are definitely bugged. It is obvious that they intended to make things grow on the soil rugs indoors in the winter, but it is malfunctioning.
On the build plants at night, this is what happens.
What it should look like:
http://i564.photobucket.com/albums/ss84/amjoie/dayinfallcopy_zps05fbd297.jpg
In winter during the day (note the fountain is now frozen)
http://i564.photobucket.com/albums/ss84/amjoie/daynotefrozenfountain_zpsf075f4eb.jpg
At night (note build plants are almost black, but you can see the faerie house light is on, and all the plants should be lit up like the fern on the left):
http://i564.photobucket.com/albums/ss84/amjoie/night_zps7b965015.jpg