indoor garden is characteristic of 1970s design. Leafy plants were popular, particularly ferns and spider plants, often in macramé hanging planters. Monstera deliciosa, ferns, aloes and snake plants (Dracaena sp., usually sold under their former genus of Sanseveria) were also popular. Terrariums and bottle gardens began to appear as well. In the 1980s, houseplants were often limited to large, lush statement pieces, particularly in bathrooms. The rise of shopping malls with large skylights created a new place for plants to be grown. In the 1990s, moth orchids became trendy. The 1990s also brought a wave of interest in artificial plants. 21st century Beginning in the mid to late 2010s, fashionable plants from earlier decades were revitalized and popularized by social media, especially Instagram, with "plantstagram" becoming a major driver of trendy plants. In 2015, 5 million Americans took up plant-related hobbies. In 2017, 30% of American households purchased at least one houseplant. Interest in houseplants exploded during the Covid-19 pandemic in 2020. With people forced to spend more time indoors, many sought to fill their homes with houseplants. Plants were mentioned on Instagram an average of more than 3,000 times a day in July 2021 and the hashtag #plantmom has been used more than 2.6 million times. Plant sales in 2020 were at an all-time high, which brought concerns about the environmental impact of the industry. Some of the most popular plants in the 2020s are the Monstera deliciosa and other aroids, as well as the fiddle-leaf fig. This era saw a larger interest in growing plants with interesting or attractive forms or foliage, rather than focusing solely on flowers. Care Houseplants have care requirements that differ from plants grown outdoors. Moisture, light, soil mixture, temperature, humidity, fertilizers, and potting are all important factors. Each plant species has different care requirements, and care requirements can vary based on the specific pot, location in a particular home and potting mix used. Most houseplants are species that have adapted to survive in a temperature range between 15 °C to 25 °C (60 °F to 80 °F) year-round, because those adapted for temperate environments require winter temperatures outside of normal indoor conditions. Within that limitation, there are houseplants which are native to many different types of habitats, from tropical rainforests to succulents and cacti native to deserts. Many houseplants are either epiphytes or live in seasonally dry ecosystems that help them adapt to