Purple Leaves

One of my plants is in flowering (five weeks) and the leaves have turned a very pale green and some are now starting to turn purple. Temp, pH, air are all good. I have them on a bloom formula with an additive of Cal/Mag. Can radiant heat cause leaves to turn purple? What other reasons causes a plant to turn purple?

cold, nutrients(or lack of), some strains are purple. but usually only cold affects the leaves.

Why are you adding cal-mag? Too much cal will lock out the P...and that will turn your fan leaves purple.

Give them a good shot of a well rounded nute, with all three NPK...leave out the additives for now...and see if the problems subside. I think they will. Providing the temps are OK like you stated.

Drink!

Father Jack said:

Why are you adding cal-mag? Too much cal will lock out the P...and that will turn your fan leaves purple.

Give them a good shot of a well rounded nute, with all three NPK...leave out the additives for now...and see if the problems subside. I think they will. Providing the temps are OK like you stated.

Drink!

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+rep
great advice

hello,
new to this forum,
growing from soil in a grow room, the last few days i have noticed the top leaves curling down and a few of the leaves turning purple, i am due to put them under the flowering bulb in 2 days, so many different reasons i have read for this, do i back off the feed?or lower the nutrient drinks as i did make it a touch sronger a few days ago, any help would be greatly appreciated - thankyou