Seedling purple stems :-)

[Kingrow1]

Trying to make observations on why seedlings can have purple stems over the last few years and following everyones seedlings here.

Above all else is it moisture stress, i see green/brown stemed seedlings turn purple as they approach the point we precieve they need water. Watering earlier seems to hold off the purpling.

Another recent factor is stem thickness, this correlates to non mj studies in that thicker stems are made by plants that have more water available.

This for those that have grown here a while now - any chance long term you can confirm this purpling and its reason maybe we can add some more info in the future. Im long suspecting that most of our problems aremoisture related.

 

[3rd Monkey]

Most of my seedlings start off purple stems for the first week or 2. As they grow, the fans start out purple, then turn to green/brown. I have some strains that the stalk will keep purple swirls and stripes their whole lives. Sometimes it's genetic. My outdoors have been battling cold. All the petioles turned purple. In a week when the weather is better, they'll go back to green/brown.

I've never seen any stems/stalks go from green/brown back to purple unless temps or P def.

I see no clear correlation between purple and water stress.

 

[Kingrow1]

Most of my seedlings start off purple stems for the first week or 2. As they grow, the fans start out purple, then turn to green/brown. I have some strains that the stalk will keep purple swirls and stripes their whole lives. Sometimes it's genetic. My outdoors have been battling cold. All the petioles turned purple. In a week when the weather is better, they'll go back to green/brown.

I've never seen any stems/stalks go from green/brown back to purple unless temps or P def.

I see no clear correlation between purple and water stress.

If my stems turn purple ive made an error, for a long time my stems are greeny/brown.

Many times peeps here have posted green seedlings they started on the window sill in a sunny spot but for the life of them under lights they purple and slow - is this the soil drying quicker leading to faster wet dry cycles defeating both underwatering and overwatering from the suns excess ir. Windowsill seedlings in small pots need water everyday and do very well - try it yourself if you got purple stems

 

[3rd Monkey]

If my stems turn purple ive made an error, for a long time my stems are greeny/brown.

Many times peeps here have posted green seedlings they started on the window sill in a sunny spot but for the life of them under lights they purple and slow - is this the soil drying quicker leading to faster wet dry cycles defeating both underwatering and overwatering from the suns excess ir. Windowsill seedlings in small pots need water everyday and do very well - try it yourself if you got purple stems

I'm 100% they aren't underwatered, or even overwatered lol.

I've just chalked it up to growing parts of the plant. As the new growth gets older, it turns green/brown.

Maybe you're on to something, but I've never experienced it in my growing. Usually when they have moisture stress, they wilt. I have coco pots that I can let dry almost bone dry, but they stay turgid right until they've had enough and wilt. No purple.

 

[3rd Monkey]

Fixing to go out in the garden soon. I'll grab some pics to show you what I mean later.

 

[Chunky Stool]

Trying to make observations on why seedlings can have purple stems over the last few years and following everyones seedlings here.

Above all else is it moisture stress, i see green/brown stemed seedlings turn purple as they approach the point we precieve they need water. Watering earlier seems to hold off the purpling.

Another recent factor is stem thickness, this correlates to non mj studies in that thicker stems are made by plants that have more water available.

This for those that have grown here a while now - any chance long term you can confirm this purpling and its reason maybe we can add some more info in the future. Im long suspecting that most of our problems aremoisture related.

Why are purple stems bad?

 

[Aqua Man]

I'm going to say root temp.

 

[Odin*]

Trying to make observations on why seedlings can have purple stems over the last few years and following everyones seedlings here.

Probably hermies.

Why are purple stems bad?

It’s a sign of imbalance/deficiency, brought on by “feedings”/temp/ph/medium/lighting/etc.

 

[Chunky Stool]

My gorilla wreck turned out decent -- purple stems and all...

 

[Chunky Stool]

Most of my seedlings start off purple stems for the first week or 2. As they grow, the fans start out purple, then turn to green/brown. I have some strains that the stalk will keep purple swirls and stripes their whole lives. Sometimes it's genetic. My outdoors have been battling cold. All the petioles turned purple. In a week when the weather is better, they'll go back to green/brown.

I've never seen any stems/stalks go from green/brown back to purple unless temps or P def.

I see no clear correlation between purple and water stress.

It's WAY better to have a little P deficiency than too much.
Excess phosphorous gives buds a chemical taste.
Been there, done that.

It does the same thing to tomatoes.
Don't believe me?
Give your tomatoes a heavy dose of bloom booster late in flower and they will taste like shit, guaranteed.