30% (2017)
About what share of American households bought at least one houseplant in 2017?
Houseplant sales boomed in the late 2010s as younger buyers embraced indoor greenery.
Source: Greenhouse Management (2017) en.wikipedia.org
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About how many times a day was a plant mentioned on Instagram in July 2021?
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About how many times has the hashtag #plantmom been used on social media?
The 'plant parent' identity became a genuine online community during the houseplant boom.
Source: Vox (2021) en.wikipedia.org
10 to 1,000 per m²
About how many houseplants per square meter would you need indoors to match normal outdoor air exchange for cleaning the air?
A 2019 scientific review found you'd need far more houseplants than most homes have to meaningfully clean indoor air this way.
Source: Journal of Exposure Science & Environmental Epidemiology (2019) en.wikipedia.org
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Questions
How does PlantSurvey.com work?
Each question asks you to guess a real number about plants — houseplants and the plant kingdom. After you answer you see how everyone else guessed, then the real figure and where it comes from.
How is the daily round scored?
Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.
Where do the numbers come from?
Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.
Is it free?
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