Ornamental plants provide homeowners the means to improve their local environment in many ways. Generally, all you need is knowledge of appropriate plant varieties and how to utilize them in the landscape.Butterfly populations can be greatly enhanced by devoting a portion of the landscape to butterfly habitat. In addition to their natural beauty, butterflies serve as valuable plant pollinators. The three necessary ingredients to attract and maintain butterfly populations all summer are:

• nectar-producing plants
• larval food plants
• a shallow pool of water
• Nectar-producing plants provide food for adults (the butterfly). Characteristics of good butterfly-attracting plants include:

• sweet, pungent and highly fragrant flowers
• red, purple, orange, yellow or pink flower colors.
• Ornamental plants are grown for decorative  purposes in gardens and landscape design projects, as house plants, for cut flowers and specimen display. Besides, ornamental  plants play important  role in human health and psychology. ... Exposed to plant settings, people have more positive emotions.