CalMag deficiency???

[pure hemp]

 

[Granger2]

I would do a foliar w/ Epsom Salts, more for the sulfate than the magnesium. I say that because of pic 4. I think you've got more than one issue going on. Good luck. -granger

 

[GF-Z]

I would just flush it with RO water. For 48hours would look at them every hour and then would add 1/2 strength nutes if problems progress Because it looks Mg-, Ca- (lower sides probably show it (green veins)), so adding it more and more, can rapidly build up salts, as transpiration stops due to LOCKOUT...
Be carefull, i would reccomend to start using cal/mg additives only on late veg, if you running fast & fat budders / heavy drinkers.

Water EC - 0.5 <-- here can be your problem. Maybe that 0.5EC is calcium + nitrates or calcium nitrate, which creates disbalance (Mg def.) So adding more, can lockout.
Root aphids / fungus gnats / virus infection <--- had very very similar lower side with infected by fungus gnats, they showed overferting at low EC (below 1.4) & it was getting worse and worse. And same 5 strains was the same, lame stuff, no real high(all highs same...), just "puff" and thats it..
>Microscope is your best friend ever you could imagine while growing plants. <
Hope it helps.
Be careful,
Peace.

 

[jorgeXXL]

hey guys I have a similar problem, don't if it overfeeding, Ca def or P def...check it

https://www.icmag.com/ic/showthread.php?t=266931

thank you!

 

[resinryder]

You are using a very high nitrogen fert. 30-10-10. Mind if I ask why? Quite possible you are burning them up
Normally I'd say EC .7 isn't enough and that you were starving them but with that high of a nitrogen level I'm not sure.
Also, the pics you posted of the plants in bloom.. the "taco" effect shown on the leaves are a sign of to much nitrogen too.

 

[medicalmj]

I'm gonna jump in and say to get a complete hydro nute and do a foliar, flush and start using it as your base nute. There are some "cheap" and effective complete nutes avaliable. I use GH flora (3 part) but couple buddies use the one part flora nova. They add a P-K boost in flower and thats it w awesome results. I use coco and add a lil more stuff but i can't stress enough how well their crops turn out w just usimng flora nova.

 

[Granger2]

In my post #22, I said sulfates because of Pic #4. I meant Pic #3. Sry. -granger

 

[darkhorse]

too much phosphorus or potassium can show as a cal mag def , cant remember which one off hand though, but it,s worth checking out.

Basicly to much nutes, lock out.

 

[medicalmj]

Your EC is not too high at 0.7, it is rather low. And the nute you're using does not contain Ca. This does appear to be a good choice for growing cannabis, esp. during flower. I can't stress enough that you should save this for your lawn or other garden and get a nute balanced for your crop. Grab a quart of flora nova bloom for $25 USD. Do a foliar, flush and resume at about 1.2-1.5 EC. Bank on it.

Total Nitrogen (N).…………………………………………………………..30%
2.06% Ammoniacal Nitrogen
3.31% Nitrate Nitrogen
24.63% Urea Nitrogen
Available Phosphate (P2
O5)……………………………..…………………..10%
Soluble Potash (K2
O)………………………………………………..……... 10%
Magnesium (Mg) (Total)…………………………………………………. 0.05%
0.05% Water Soluble Magnesium (Mg)
Boron (B)……………………………………………………………......0.0068%
Copper (Cu)…………………………………………………………..…0.0036%
0.0036% Chelated Copper (Cu)
Iron (Fe)…………………………………………………………….…...…0.05%
0.05% Chelated Iron (Fe)
Manganese (Mn)…………………………………………..…………...…0.024%
0.024% Chelated Manganese (Mn)
Molybdenum (Mo)…………………………………………………..… 0.0009%
Zinc (Zn)…………………………………………………………...…... 0.0022%
0.0022% Chelated (Zn)
Derived from: Ammonium Phosphate, Potassium Nitrate, Urea, Magnesium Sulfate,
Boric Acid, Copper EDTA, Iron EDTA, Manganese EDTA,
Sodium Molybdate, Zinc EDTA.

 

[medicalmj]

Your EC is not too high at 0.7, it is rather low. And the nute you're using does not contain Ca. This does appear to be a good choice for growing cannabis, esp. during flower. I can't stress enough that you should save this for your lawn or other garden and get a nute balanced for your crop. Grab a quart of flora nova bloom for $25 USD. Do a foliar, flush and resume at about 1.2-1.5 EC. Bank on it.

Total Nitrogen (N).…………………………………………………………..30%
2.06% Ammoniacal Nitrogen
3.31% Nitrate Nitrogen
24.63% Urea Nitrogen
Available Phosphate (P2
O5)……………………………..…………………..10%
Soluble Potash (K2
O)………………………………………………..……... 10%
Magnesium (Mg) (Total)…………………………………………………. 0.05%
0.05% Water Soluble Magnesium (Mg)
Boron (B)……………………………………………………………......0.0068%
Copper (Cu)…………………………………………………………..…0.0036%
0.0036% Chelated Copper (Cu)
Iron (Fe)…………………………………………………………….…...…0.05%
0.05% Chelated Iron (Fe)
Manganese (Mn)…………………………………………..…………...…0.024%
0.024% Chelated Manganese (Mn)
Molybdenum (Mo)…………………………………………………..… 0.0009%
Zinc (Zn)…………………………………………………………...…... 0.0022%
0.0022% Chelated (Zn)
Derived from: Ammonium Phosphate, Potassium Nitrate, Urea, Magnesium Sulfate,
Boric Acid, Copper EDTA, Iron EDTA, Manganese EDTA,
Sodium Molybdate, Zinc EDTA.

Mg is a mere .05%!!! Compare that to the 2.0% Mg and 4.0% Ca found in flora nova! There's your problem. And get the EC up a little.

 

[pure hemp]

Let's give up the guerrilla homemade! hehe

I got a quarter of FN Bloom an VEG and start feeding with them! Also, I both a new CalMag!

Girls completing six weeks of flora and it seems that only now begun to unlock the problems that prowled the third week ...

The fries on the leaves seem to stop, as I will now yellowing decreasing nuts ... does not have much more to do then is wait and watering the mature trics.

Moreover, three clones Kandy Kush put to bloom.

Kandy Kush x Skunk #1

Clone #1

Clone #2

 

[pure hemp]

Lemon Skunk (DNA) #1

Lemon Skunk (DNA) #2

Is Lemon Skunk DNA long to bloom?

tks again!!!

 

[medicalmj]

Sounds like you're back on track! Yeah, ya really gotta be a commercial grower to buy in bulk and custom mix. You did good getting the FN bloom and grow, while I don't use it many I know do and they love the results and simplicity.