We’d love to see your houseplants: the biggest, the oldest and the most unusual: from the Swiss cheese plant that’s taking over your front room to the venus fly trap you’ve been nurturing for years.

We’ll print our favourites in the Do Something section of the Guardian, so please make sure you upload the highest resolution images you can. We’ll also publish a gallery on the Guardian website.

You can share your houseplant photos via GuardianWitness by clicking on the blue ‘Contribute’ button on this article. You can also use the GuardianWitness smartphone app or the new Guardian app and search for ‘GuardianWitness assignments’.

• GuardianWitness is the home of user-generated content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be reviewed prior to publication on GuardianWitness, and the best pieces will feature on the Guardian site