Purple leaves, new in flower week 6

Chester da Horse

Chester da Horse

Well-Known Member
Hi RIU

One of my plants is throwing a purple hue to all new leaf growth in late flower.

Temps 16-23C (60-73F), 400W HPS at 8".

The yellow blotching i'm pretty sure is wind burn I'm not worried about.

Is the purple a problem?

I'm nearly at the end of first grow, and have nothing but gratitude to all of you for the help and laughs so far.

I've been harvesting a few sneaky colas here and there for 'airflow/canopy' management purposes. I love this shit!
 

Attachments

ebcrew

ebcrew

Well-Known Member
what strain?

could be nitrogen or phosphorus deficiency (cant remember which causes purple leaves) or genetics. (im no expert so anyone feel free to correct me)
 
Chester da Horse

Chester da Horse

Well-Known Member
@Farmer's Hat Only one of 3 plants is doing it,

Phos def is blotchy unhealthy purple patches right?


Taylor (G4, pictured) is showing more of a dull purple sheen in the centre/vein parts of the leaf.

The strain is Ganesh by mandalaseeds. They have expressed slightly different phenotypes. Candy (G1) is looking sharp and Miranda (G2) had some weird automatic fan leaf defoliation thing go on, yellowing older fan leaves about a week ago then dropped all the old fan leaves. But she's so frosty, way more sugar coated than the other two.

Each plant is showing quite different personalities under the same environment, but I love them all :weed:

@ebcrew, I will definitely up the guano (1-9-1) on her next feed
 
SPLFreak808

SPLFreak808

Well-Known Member
Chester da Horse said:
@Farmer's Hat Only one of 3 plants is doing it,

Phos def is blotchy unhealthy purple patches right?


Taylor (G4, pictured) is showing more of a dull purple sheen in the centre/vein parts of the leaf.

The strain is Ganesh by mandalaseeds. They have expressed slightly different phenotypes. Candy (G1) is looking sharp and Miranda (G2) had some weird automatic fan leaf defoliation thing go on, yellowing older fan leaves about a week ago then dropped all the old fan leaves. But she's so frosty, way more sugar coated than the other two.

Each plant is showing quite different personalities under the same environment, but I love them all :weed:

@ebcrew, I will definitely up the guano (1-9-1) on her next feed
Click to expand...
you are fine bro! i get the same thing late in flower with organic soil.
 
ebcrew

ebcrew

Well-Known Member
Good to know, for my own personal knowledge. Ive only achieved purple leaves from genetics (dark devil) and not from a deficiency, so off of personal experience i didnt know the correct advice to give.
 
707humboldt

707humboldt

Well-Known Member
A way to achieve purple in your plants is to drop the temps in the room in the last couple weeks of flower. Some strains will turn purple, others won't. Ive even had blue dream get a purple tint outdoors one time when we got abnormally cold weather one year at the end of the season. The year before and after it wasn't that cold and the same blue dream strain from the same genetic line didnt turn. Naturally purple strains will turn even more purple if the temps get dropped
 
Chester da Horse

Chester da Horse

Well-Known Member
@SPLFreak808 - thanks bro. ur input has helped us get this far, hope you enjoy the show

Guys, I'm not trying to make them go purple, but I like it! Its getting chilly round here... the outside air temps reach 4C/55F at dawn and Taylor is right infront of the fresh air intake fan. Must be the cold. Hopefully she's feeling perky.
 
SPLFreak808

SPLFreak808

Well-Known Member
you're welcome bro. happy growing. here is an afghan i had that purpled naturally towards end of flowering. Temps never left 70-80f20150427_083624.jpg
 
Last edited:
ebcrew

ebcrew

Well-Known Member
707humboldt said:
A way to achieve purple in your plants is to drop the temps in the room in the last couple weeks of flower. Some strains will turn purple, others won't. Ive even had blue dream get a purple tint outdoors one time when we got abnormally cold weather one year at the end of the season. The year before and after it wasn't that cold and the same blue dream strain from the same genetic line didnt turn. Naturally purple strains will turn even more purple if the temps get dropped
Click to expand...
I knew that, but forgot to mention it. I do have a question though, for people who live in extremely hot climates, where dropping the temp below 80 is impossible, can ice cubes be used while watering to drop soil temp?
 
SPLFreak808

SPLFreak808

Well-Known Member
ebcrew said:
I knew that, but forgot to mention it. I do have a question though, for people who live in extremely hot climates, where dropping the temp below 80 is impossible, can ice cubes be used while watering to drop soil temp?
Click to expand...
i dont think you want to give your roots cold or hot water regardless of ambient temp, especially since they will only be cold for 1/12th of the total time it was hot. it would more than likely shock the plant. im not sure though as i have never tried. i get away with 83f 60%RH with the 1000HPS. so far so good. *knocks on wood*. my temps are and always will be within 77-83f year around as our days can only get an hour longer or shorter.
 
ebcrew

ebcrew

Well-Known Member
SPLFreak808 said:
i dont think you want to give your roots cold or hot water regardless of ambient temp, especially since they will only be cold for 1/12th of the total time it was hot. it would more than likely shock the plant. im not sure though as i have never tried. i get away with 83f 60%RH with the 1000HPS. so far so good. *knocks on wood*. my temps are and always will be within 77-83f year around as our days can only get an hour longer or shorter.
Click to expand...
Makes sense that it would stress the plant out more then do any good. So theres no hope for people like me in hot climates where temps below 80F are rare. I mean as far as bringing out that purplish color from low temps instead of straight gentetics?
 
SPLFreak808

SPLFreak808

Well-Known Member
ebcrew said:
Makes sense that it would stress the plant out more then do any good. So theres no hope for people like me in hot climates where temps below 80F are rare. I mean as far as bringing out that purplish color from low temps instead of straight gentetics?
Click to expand...
I believe low temps is the least stressfull out of all color stress teqniques. is your plant outdoors? Or do you use lights at night?
 
mr sunshine

mr sunshine

Well-Known Member
707humboldt said:
A way to achieve purple in your plants is to drop the temps in the room in the last couple weeks of flower. Some strains will turn purple, others won't. Ive even had blue dream get a purple tint outdoors one time when we got abnormally cold weather one year at the end of the season. The year before and after it wasn't that cold and the same blue dream strain from the same genetic line didnt turn. Naturally purple strains will turn even more purple if the temps get dropped
Click to expand...
low temps turn plants purple because phosphorus is getting locked out....some strains can withstand colder temps then others.
 
mr sunshine

mr sunshine

Well-Known Member
ebcrew said:
Makes sense that it would stress the plant out more then do any good. So theres no hope for people like me in hot climates where temps below 80F are rare. I mean as far as bringing out that purplish color from low temps instead of straight gentetics?
Click to expand...
You can Deprive your plant of phosphorus. but i wouldn't recommend it
 
707humboldt

707humboldt

Well-Known Member
mr sunshine said:
low temps turn plants purple because phosphorus is getting locked out....some strains can withstand colder temps then others.
Click to expand...
It doesnt do that much damage, still gotten 2# per light dropping temps to 60 when lights off during the last two weeks. Just helps bring extra purple out, still AAA meds all day
 
O

old shol4evr

Well-Known Member
ebcrew said:
Makes sense that it would stress the plant out more then do any good. So theres no hope for people like me in hot climates where temps below 80F are rare. I mean as far as bringing out that purplish color from low temps instead of straight gentetics?
Click to expand...
keep straw on top of your medium brother it cool the soil like mulch
 
You must log in or register to reply here.
Top