About what share of all known plant species are flowering plants?
Answerabout 85–90%
Flowering plants (angiosperms) dominate the plant kingdom, vastly outnumbering ferns, mosses and conifers.
Source: World Flora Online (2023) en.wikipedia.org
Nature · Facts & sources
Plant facts & stats
4 sourced facts about plants — houseplants and the plant kingdom, each with the context behind the number. 4 more are in today's round and appear here after it closes.
The basics
Going deeper
About how many times a day was a plant mentioned on Instagram in July 2021?
Answerabout 3,000/day (Jul 2021)
Plant content surged on social media during the pandemic as more people took up indoor gardening.
Source: Vox (2021) en.wikipedia.org
Expert level
About how many times has the hashtag #plantmom been used on social media?
Answerover 2.6 million uses
The 'plant parent' identity became a genuine online community during the houseplant boom.
Source: Vox (2021) en.wikipedia.org
About how many houseplants per square meter would you need indoors to match normal outdoor air exchange for cleaning the air?
Answer10 to 1,000 per m²
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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