Let It Grow may refer to:
- A song by Eric Clapton recorded on 461 Ocean Boulevard
- A song by John Perry Barlow and Bob Weir, Part II of the "Weather Report Suite", first recorded by the Grateful Dead on Wake of the Flood
- A song by Renaissance on the album Ashes Are Burning
- A song featured in the movie The Lorax which became an Internet meme in late 2016.
- A joint campaign by BCGI, EAZA and ECSITE on biodiversity loss
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