Indoor Auto White Widow deficiency

[BAMWW]

I'm at week 7 of my second grow. One of my AWW is slower to produce buds than the other plants and its leaves look a bit weird. They are dry and cupped upwards and slightly deformed with some brown patches on the fan leaves. I also notice some stems are purple. Would this be a phosphorus deficiency?

 

[BAMWW]

 

[namvet25]

Looks like a combo of cal/mag def and phos def. Have you been checking your PH? What are you feeding them?

 

[ripster]

Try a dose epsom salt. 1/3 tsp per 3 gallons of water. That will stop the problem but wont repair the damage that's done.

 

[ripster]

How's your humidity?

 

[BAMWW]

I added a little epsom salts to the feed last week. They are due a watering again tonight or tomorrow so I'll add a bit more. My ph is about 6.5. I've been keeping an eye on it this time round so I don't think that's the problem.

I'm using Plagron organic nutrients at 1/3 to 1/2 strength each watering. I also added green sensation last watering which I think is basically PK 13/14.

I underwatered this plant last week too. Just enough to wilt the lower leaves and it recovered within a few hours but this problem cropped up around then. I had a similar problem last grow with an AWW and it got to the stage where there was no saving it. I had put that down to the ph trouble I was having at the time.

 

[BAMWW]

My humidity is about 65-70% and a little high if anything