Snake plant Sansevieria 'Straight'It requires very little, but gives so much in return! The 'Straight' Mother in law's tongue. This house plant has strong, round, green branches. The branches store lots of humidity, so the plant does not need a lot of watering. Besides looking stunning, the 'Straight' also purifies the air! The Mother in law's tongue is very easy to care for. The house plant only needs watering once every three weeks. The Sansevieria doesn't need much water. It is