Every conventional house recommends planting of medicinal plants or herbs, or flowers to perform pooja. These plants with their fragrance and healing power add positive energies to the ambiance.
Tulsi plant releases Ozone(O3) 4 hours in early morning along with Oxygen(O2), which is very essential for ecological balance.
According to Vastu, it is considered to be auspicious to have a Tulasi plant in front of your house. It wards off negative influences from your house. The Tulasi plant should be located in the front of the house (not directly) to the main entrance. The ideal place is East. Keeping this plant in your home can invite good luck and prosperity. This plant reduces all negativity and vastu dosh.