Red stem is often the first sign of a nitrogen defciency. This can be because you need to add Nitrogen or you need to adjust your PH so that your plant can actually absorb the Nitrogen.

Almost all clones have red stems.. this is not a problem at all.. But when you have a plant that has a green stalk and it is 3 weeks old and you still want to veg it for 3 more weeks and you notice that the stalk is starting to go red and spread to secondary growth, then you should take some action...

Eventually the plant will/can turn completly red and all the stems will become spindley and brittle...

ALWAYS check your PH first...

and now you KNOWM

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Garden Knowm Reviewed by Garden Knowm on . red stalk and stems I aquired some clones a while ago from a friend, they had a noticable nutrient decifiency of some sort which I could tell by the stalk and stems being very red. It started clearing up good on the new growth but there was still noticable red on the new stems, and the old ones were still as red as ever. I also aquired a couple more clones that were in good health from another friend, but they are starting to show some red on the stems as well. I use "Earth Juice" ferts. I have their whole line of Rating: 5