I think I may have been the one to post the original.

I still believe that when first coming out of the soil, the red stems are going to be female. Later they will just get green but as the plant gets a little older just the leaf stems will get a dusting of red on the upper surface of the stem. To the best of my feeble recollection I have never had a male that had the red discoloration.

This is not an every time thing, just mostly. Currently I found one that looked male on sprouting. It is a female. It does not have any red at all in the leaf stems. So, my theory is not perfect just something that is more common in females.

Yes the purple can also mean deficiency.....but not at the itty bitty first stage of life when it is living off the cotlydon (sp?).

I am not fool enough to stick my neck out and say that this is perfect, just a theory and observations of growing over 30 years.
WashougalWonder Reviewed by WashougalWonder on . Sexing Method; Fact or Fiction? This post is in regards to a post I found a while back that I cannot find anymore. I believe it was about sexing from unknown seeds and not clones. The post indicated that "sex" could be determined well befor pre-flowers. It was said that a "male" will not produce any purple in the stem system, or any sort of purple veins. It was also said that a "female" will always produce purple in the vein system. The purple may appear in the whole plant, just the stem, just the the leaf shoots, or a Rating: 5