Some identifying factors of house plants are that they grow well indoors and are usually ornamentals. Houseplants help clear away indoor pollution, improve the mood of those who live with them and even improve cognitive functions such as memory and learning.
A great variety of houseplants exists. They range from succulents, such as cacti, to palm trees, orchids, begonias and coleus. These plants have different needs for temperature, fertilizer, watering and sunlight, but all can grow indoors.
Even herbs are grown as houseplants if they receive enough sunlight. These plants, which include basil, rosemary, cilantro and thyme, are used in cooking. Annuals are easy to start from seed while perennials are best grown as transplants.