Correction to: Nature Materials https://doi.org/10.1038/s41563-020-0615-x, published online 17 February 2020.

In the version of this Article originally published, the x-axis labels of Fig. 1b,d incorrectly read ‘Secondary column’ and ‘Tertiary column’; they should have read ‘Secondary colonies’ and ‘Tertiary colonies’. This has now been corrected.