3 weeks from seed, deficiency already?

Powertech · Nov 17, 2019

So I have 8 plants from seed, started with 10 seeds, 9 germinated, 8 made it (only my first grow from seed so I’ll take 80%). One is showing what looks like a deficiency.

Blue Cookies
Black Gold Soil
Only second feeding with nutes at low strength so deficiency likely
GrowMore 30-10-10
Botanicare CalMag
DynaGro Pro-TeKt silica
Great White

Temp constant 72, RH 50-65% depending on when last water was, which has never been less than 4 days apart.

Herb & Suds · Nov 17, 2019

Not all pheno's of plants eat the same
You are over zealous in your concerns at this point
I don't feed every plant the same even from the same seed stock

Powertech · Nov 22, 2019

I have been using CalMag, but it seems the deficiency signs are continuing. Do I have the wrong diagnosis of Cal and Mag deficiency?

Powertech · Nov 22, 2019

Well now that I think about it more I guess it probably hasn’t had time to recover yet lol. Only third feeding yesterday......so yeah my last batch is pretty stellar except the harshness. Great flavor and fantastic high though.

danielbae · Nov 23, 2019

Powertech said:
Well now that I think about it more I guess it probably hasn’t had time to recover yet lol. Only third feeding yesterday......so yeah my last batch is pretty stellar except the harshness. Great flavor and fantastic high though.

How close are your lights?

Powertech · Nov 23, 2019

danielbae said:
How close are your lights?

2 100W QB’s about 3 feet from plants. Need 4 to get the coverage, think it’s still too much?

Merlin1147 · Nov 23, 2019

What’s your ph?

NastyNug · Nov 23, 2019

Looks like your over watering and too many Nutes. Back of the watering and Nutes. Add microbes like great white. They’ll bounce back in a week.

Boatguy · Nov 23, 2019

Try to get your temp up a bit.
I have my controller set at 80, and the plants are much happier than when i had them in the low 70's.
In the same size pots, i was watering every 3 days.
Mine are under led as well.

NastyNug · Nov 23, 2019

Boatguy said:
Try to get your temp up a bit.
I have my controller set at 80, and the plants are much happier than when i had them in the low 70's.
In the same size pots, i was watering every 3 days.
Mine are under led as well.

If you’re comfortable, they’re comfortable

Powertech · Nov 23, 2019

Merlin1147 said:
What’s your ph?

Water has gone in 6.6-6.8 every time. I still need a soil probe.

NastyNug said:
Looks like your over watering and too many Nutes. Back of the watering and Nutes. Add microbes like great white. They’ll bounce back in a week.

They were actually under watered a bit. I am using great white, less than full dose though

Boatguy said:
Try to get your temp up a bit.
I have my controller set at 80, and the plants are much happier than when i had them in the low 70's.
In the same size pots, i was watering every 3 days.
Mine are under led as well.

every 3 days is about right for me too. Never more often on these yet

Thanks for the input, much appreciated everybody

Merlin1147 · Nov 23, 2019

Bring your temperature up. 72 is a bit low especially with LEDs. Try 78-80. That should help with transpiration and Ca mobility.

Powertech · Nov 23, 2019

Merlin1147 said:
Bring your temperature up. 72 is a bit low especially with LEDs. Try 78-80. That should help with transpiration and Ca mobility.

Ok, that’s extremely easy to do! I was under the impression low 70’s was what cannabis likes, but if that was true nobody in Here in CA could grow outdoors

Powertech · Nov 25, 2019

Well they are peeking up, and I know the pics may not look it but they are getting better. I am foliar feeding CalMag (although fairly weak) just before my 4 hour lights off (didnt even have lights off, but I will from now on for 4 hours). Also turned the temp up to 78, which the plants seemed to thoroughly enjoy. I have a lot to learn. Thanks for the help everybody!

Powertech · Nov 25, 2019

I have not set the RH yet since temp increase. What should it be at for this stage?

danielbae · Nov 26, 2019

I'd aim for 55-60%

Powertech · Nov 28, 2019

The mag deficiency doesn’t seem to be going away, although the new growth doesn’t have it yet. Does it not get better, just stop getting worse? I thought mag was mobile

Nutty sKunK · Nov 28, 2019

Powertech said:
The mag deficiency doesn’t seem to be going away, although the new growth doesn’t have it yet. Does it not get better, just stop getting worse? I thought mag was mobile

Looks like copper deficiency to me in that pic. Note the interveinal chlorosis in the newer not older leaves, they have a bluish hue to them too..

How to fix Cannabis Copper Deficiency (Cu) Pics & Symptoms

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Powertech · Nov 28, 2019

So the article only says correct the ph. I am religious about calibrating the pen before each watering, checking again after. I guess I still need a soil tester. When I transplanted the roots looked healthy

Nutty sKunK · Nov 29, 2019

Powertech said:
So the article only says correct the ph. I am religious about calibrating the pen before each watering, checking again after. I guess I still need a soil tester. When I transplanted the roots looked healthy

Id say if the PH is correct you either have very little chopper (doubt it) or its being antagonised by P and N.

3 weeks from seed, deficiency already?

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