Due to a low light level indoor plants may need grow lights to thrive! Some considerations on grow lights: http://bit.ly/zO6Adh
Do not forget your houseplants: they need light to carry on! About two errors that lead to plant death: http://bit.ly/AoGtzl
Plan your garden: each plant needs a certain amount of sunlight! A few plants for each sun level: http://bit.ly/tSTD9D
Check your houseplants: are light levels sufficient now? How to choose the right houseplant: http://bit.ly/uzgiBZ
Do not forget your houseplants: Are light levels sufficient? How to care for houseplants in winter: http://j.mp/ieKCCN