The south-west corner of your house is of the ‘earth’ element and is connected to relationship and marriage aspirations. Green plants are of the wood element, and in the destructive cycle of elements, wood destroys earth. The presence of green plants here hence is harmful to the earth energy of this area and can affect relationship badly. It will also reduce marital prospects, If you have already kept green plants in this area of your house, please get rid of them immediately.