Calcium deficiency?

[Bongzilla]

Is this a calcium deficiency? She's been real healthy otherwise. Just starting to see more leaves like this! The plant is 40 days old today. Also an autoflower.Grown in hydro.Heres some pics of the leaf condition and the actual plants. There's two plants in one waterfarm! But like I said, they looked real healthy till I started noticing these leaves these rusty brown spots on them. Any help is appreciated!

 

[RivetGrrl]

I would say yes it is, pretty common in hydroponics. I had the same issue when I switched to hydroponics, using WaterFarms as well. I use CalMag with every nutrient run and no more issues.

 

[Bongzilla]

Should I use the recommended dosage for the cal mag? Tang says 1 ml per liter, but that's in soil. But I've been going exactly by his feeding schedule except im doing it in hydro. Worked well until now with these spots! I'm using advanced nutrients. Thanks for quick response. Much appreciated.

 

[RivetGrrl]

I'm using either General Hydroponics in my smaller units because they clog, or Grotek mixed with Si, Fulvic & Humic acid in the WaterFarms. I add the CalMag to both at the recommended dose on the bottle; I hit my plants with fairly high EC push about 2.2 flower 1.6-1.8 Veg, with plain water between (weekly res change).
Sorry I'm not familiar with the Tang formula? Or method? I'll do a search but if you get back to me before I edit the thread let me know what it is.
Edit once to add do you know the pH in your Farms? I see the leaves curling a bit too.
OH brainfart too I'm growing Photo's right now I realize Auto's don't need as heavy a feed.
Found the thread just now follow the formula as stated for the Calmag for your Auto, if you are following the same with the other nutrients and your plants are doing well other than the Ca Def.

 

[Bongzilla]

All you gotta do is Google " Tangs Easy Feeding Schedule" His schedule supposedly works for photos too. Just extend the OVERDRIVE phase! Thanks for your help!

 

[BII]

To avoid cal-mag further increasing your feed water EC/ppm's, consider foliar feeding.

Most would probably say avoid foliar feeding, spraying water on the plant, at your stage in bloom, but with my low humidity, spraying a fine film, and lots of ventilation I'd foliar feed the plant now. Consider using Transport from Optic Foliar for likely even more efficient top-of-leaves foliar feeding vs. the usual bottom-of-the-leaves with surfactant/detergent method.

 

[LittleMT]

To avoid cal-mag further increasing your feed water EC/ppm's, consider foliar feeding.

Most would probably say avoid foliar feeding, spraying water on the plant, at your stage in bloom, but with my low humidity, spraying a fine film, and lots of ventilation I'd foliar feed the plant now. Consider using Transport from Optic Foliar for likely even more efficient top-of-leaves foliar feeding vs. the usual bottom-of-the-leaves with surfactant/detergent method.

I'm with you, I love Overgrow by Optic Foliar it is one of my goto products. I would and do use it well into bloom, I do my best to avoid the flowers but will soak up whatever big fan leaves I can safely spray. This product can be used will the lights on which is a huge win.

 

[Bongzilla]

Just a couple of questions for you guys. My autoflowers look like they're not filling out like they should. The plant is pretty healthy except for a calmag deficiency I'm working on. It's pretty green and has a real thick trunk.Do these buds look alright being 45 days from seed? Any thoughts. If you need a specific pic of something ,just ask! Thanks!

 

[Bongzilla]

Here's a few better pics for ya! The flash on this phone is serious! Lol!

 

[SUNDOG]

Not trying to say it is, but if it keeps spreading and is not corrected by Cal/Mag you might want to look in to "Cannabis Leaf Septoira". It's commonly mistaken for cal/mag deficiency...kind of looks like it.