Q.Stems Turning Purple
I would like to know why my bok choy and cilantro stems turn purple. It seem like they have hard time growing bigger. Is the soil too rich or too light? Is it too much or too little water? Thank you very much.

Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on February 18, 2014
It is caused by a phosphorous deficiency. Some bone meal will help correct it.
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