Cinco
Well-Known Member
Well, it’s my first grow, and I have 2 of 3 plants showing what looks to me to be a potassium issue. However despite having been a member here for 12 years (holy shit) this is my first post and and grow. Pics, and then grow info below:
How it began, small spots on old growth
The worst of it, on the biggest plant.
The autoflower
I notice reddish stems? On affected fan leaves
Details:
2x bag seed photoperiod, 6 weeks into veg and about to be up-potted to 5gal and put to flower
1x white widow autoflower, 2.5 weeks from seed
All in 3 gallon pots with 70% coco coir 30% hydroton. Coir was rinsed to tap EC and then buffered with a calmag solution twice, and rinsed again. Fertigated by hand 2x daily to 30% or more runoff.
All plants getting 2ml/gal (half strength) GH CALiMAGic and FloraNova Grow. Bigger girls to 1.7 EC (0.3 water, 0.2 Cal/Mag, 1.2 FN Grow). Smaller girl is same, diluted to quarter and as a week ago half strength.
I usually pH to 5.6-5.7. I am wondering if I should sweep up. EC and pH are being read with a Bluelabs combo meter.
This showed up on both girls as of about a week ago, starting on the lowest true (three finger) leaves. Now has spread a bit Upward. I have dropped EC gradually to 1.4 but sure would like some eyes on this and help. What should my next steps be?
How it began, small spots on old growth
The worst of it, on the biggest plant.
The autoflower
I notice reddish stems? On affected fan leaves
Details:
2x bag seed photoperiod, 6 weeks into veg and about to be up-potted to 5gal and put to flower
1x white widow autoflower, 2.5 weeks from seed
All in 3 gallon pots with 70% coco coir 30% hydroton. Coir was rinsed to tap EC and then buffered with a calmag solution twice, and rinsed again. Fertigated by hand 2x daily to 30% or more runoff.
All plants getting 2ml/gal (half strength) GH CALiMAGic and FloraNova Grow. Bigger girls to 1.7 EC (0.3 water, 0.2 Cal/Mag, 1.2 FN Grow). Smaller girl is same, diluted to quarter and as a week ago half strength.
I usually pH to 5.6-5.7. I am wondering if I should sweep up. EC and pH are being read with a Bluelabs combo meter.
This showed up on both girls as of about a week ago, starting on the lowest true (three finger) leaves. Now has spread a bit Upward. I have dropped EC gradually to 1.4 but sure would like some eyes on this and help. What should my next steps be?
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