I've been sprouting my beans for three days now; yesterday I noticed some had developed a slight purple coloration while rinsing them, photo attached. One of them even went blue-ish, but there is no brown or signs of mold. Is this normal or should I worry?

Here's a picture of the sprouts:

Here's a pic of the sprouts

1 Answer 1


The sprouts developing a purple tinge is fine, it's a sign that they were exposed to light - they will even start turning green if they recieve more light.

This is like with white asparagus: As long as the stalks remain completely covered in the soil, they stay white. If they start to break through the surface, they develop a purple tinge in a very short time.

See the picture below:
Some stalks are still white, some slighltly purple.


  • But there's nothing wrong with eating green-ed sprouts, or is there? Commented May 13, 2015 at 8:03
  • 1
    No, they are just fine. Give them another day or two, then enjoy them.
    – Stephie
    Commented May 13, 2015 at 8:04

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