PURPLE LEAVES

[jojo]

does anyone know why Mj leaves turn PURPLE later in the cycle?these are outdoor plantstoo. Edited May 19, 2003 by jojo

[Guest bacchus]

hi jojo....

 

outdoor plants that are growing in the cooler months can produce purple stems and leaves due to the temperature.....

aslo i have heard that plants can also show a purple discolouration from mineral deficiency, can't remember if it is phosphorous or nitrogen, but if your plant is otherwise healthy, i would say it is the cold temperature....

 

cheers

 

bacchus

[Tom]

Here's a purple Bubblegum, the colour is soley due to the cold.

[Luke Skywalker]

It's a substance called anthrocyanin. Well, it's sort of like sunscreen for plants, they produce it when the temps drop low. When the sunlight shines on the plant in the morning, the cells are very, very cold, and the sunlight heats them too quickly and can cause scorching in susceptible strains. So many, many plants, (ever noticed new growth on rose bushes are red/purple? And ever seen a Japanese Maple in autumn? They're completely purple!) use this method of protection.

It wont hurt you, in fact, some think that anthrocyanin production is a good attribute to breed into weed, as it makes the stuff look fantastic! I don't think it affects potency though, unless the added protection the plant gains gives it more time to flower.... Anyone know about this? Show us a pic if you can, let's see this lady in the pixel!

[Guest weekprik]

potassium deficient plants go purple, infact if you purposely deprive them they will go all purple.