Issue with new growth turning purple

browntrout · Jul 28, 2018

Hello all,

I am wondering if you can help me with this issue, these strains are not purple.

The issue varies from branch to branch and almost every strain in the garden has this issue.

Thank you,

browntrout · Jul 28, 2018

troutman · Jul 28, 2018

Has it been very cold at night lately?

browntrout · Jul 28, 2018

troutman said:
Has it been very cold at night lately?

No, average of 19C nights, 27C days and 80% humidity.

I used to think it was light related when doing guerrilla in which this is, but I am thinking more a deficiency now.

troutman · Jul 28, 2018

Read this and I think you'll see what is going on.

https://mcgregor.com/home/news/purpling-in-wheat-seedlings/

browntrout · Jul 28, 2018

Maybe it's the temperature swings that are causing this?
http://gr0wing.blogspot.com/2012/05/marijuana-problems-symptoms-how-to.html

However my potted plants 500' away don't have this issue except for the one male I dug up from this guerrilla area and put with the potted plants.

troutman · Jul 28, 2018

If you read the link I posted above it indicates cooler nights causes less phosphorus to be available and purpling. :tiphat:

It's the joy of being in a Northern region without a greenhouse.

Dday391 · Jul 28, 2018

I read that mag deficiencies can turn them purple? Maybe try a feeding of calmag?

mack 10 · Jul 28, 2018

I'd say temps? Or a pH lockout causing something to fall out?
(from either too much or not enough P)
We get buds like that when grown outdoor in the UK.
Usually end of September though
When it starts to get really cold.

browntrout · Jul 28, 2018

mack 10 said:
I'd say temps? Or a pH lockout causing something to fall out?
(from either too much or not enough P)
We get buds like that when grown outdoor in the UK.
Usually end of September though
When it starts to get really cold.

I am more inclined with this logic in addition to temp swings etc., the plants that are affected more are the lighter plants. When I had done the soil report P was the most depleted and since have added amendments to try and resolve the issue. PH was also down, I am going to add even more lime (includes calcium magnesium) with a feeding of high P water soluble.

Lester Beans · Jul 28, 2018

I've seen that many times. Temp swing for sure. We had an early week in the high 80's followed by some cool nights and every plant looked like that. Even some tomatoes. Grew right out of it. No reason for concern.

browntrout · Aug 8, 2018

Lester Beans said:
I've seen that many times. Temp swing for sure. We had an early week in the high 80's followed by some cool nights and every plant looked like that. Even some tomatoes. Grew right out of it. No reason for concern.

Not so sure about this, I have seen it persist through flower in the past. Temperature has been stabilizing as of recent. Here is an update. The branches with more purple are of smaller size including stems/leaves.

zappa66 · Aug 17, 2018

Any update? I’m having the same issue, just started to add cal mag but it’s too early to tell what is any effect it’ll have.

browntrout · Aug 17, 2018

zappa66 said:
Any update? I’m having the same issue, just started to add cal mag but it’s too early to tell what is any effect it’ll have.

No solution yet, I've used a lot of Dolomite Lime which has calcium / magnesium. And my levels via lab report seem fine, my PH is down.

I've added ground oyster shells, Fish bone meal and 6-12-12 time release as a top dressing in order to raise PH and add P/K.

We have a large 30mm rain coming tomorrow I am told.

Iffy · Aug 17, 2018

Deffo low temps at night. It causes a build-up of pigments in the top half of new leaves and by your photos, I'd say it was a safe bet.
Regards,
Iffy

browntrout · Jul 23, 2019

Same issue again this year, growth slows the worse it gets, buds are 1/3 of the size and grow irregular.

It is not superficial and some majorly hindering the plants ability to grow/produce.

TychoMonolyth · Jul 23, 2019

I had a couple Autos go dark purple. Buds were almost black. Wish I could get a whole harvest like that. Awesome bag appeal.

browntrout · Jul 25, 2019

Not caused by temps or phos lock-out. Likely phytoplasma related or physiological response.

Plant's don't rarely ever grow out of it and creates twisted/retarded growth.

Buds are 1/3 of regular size usually, taste like shit and rarely make it too maturity.

https://www.rollitup.org/t/outdoor-problems-purple-or-mold-help.217458/page-2

T H C
https://www.*********.com/threads/dark-purple-disease-affecting-new-growth.98203/page-5
Farmer

Chemdawggy Dawg · Jul 25, 2019

What happens if you top that part? I wonder if it could be broad mites. It definitely doesn't look like any normal condition.

TheScorpion · Jul 28, 2019

Out of curiosity, what IS the pH of the soil and the water you are giving them?

I use rain water, and make sure it's not overly acidic. Adding fertilizer to that water WILL raise the pH somewhat, so it's a factor.

This doesn't look like pH lockout though... it looks like a temperature issue but I trust you when you say there haven't been swings in temps.

I'm following in the hopes to learn MOAR hahaha

Issue with new growth turning purple

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