Day 55, Yellow leafs with red rusty spots. Dinafem CBD.

[Sirro]

Hi AFN,

I need your help.

Problem: light green, yellow leafs with rusty and red spots.

Medium/grow method: Soil, Plagron lightmix with a little bit extra perlite.

Feed: and supplements used: 2ml AN Sensi Bloom A+B (A=3-0-0, B=2-4-8), 1-2ml AN CalMag (4-0-0), 1-2 ml AN Overdrive (1-5-4), 1ml AN Carboload, 2ml Microbe Photosynthesis Plus, and Sometimes: Molasses, BioBizz Topmax, Biobizz Alg a Mic.

water source: Tab Water (chlorine free PH 7,6), After Nutriens its between 6,3 and 6,7 PH.

Strain/age: Dinafem CBD Haze at day 55 have die bigger problems with the braun red spots

light used: Diy citzizen cob, at 120 Watt (this is the lowest i can set). 30cm (11 inch) from the highest Bud.

Climate: Temp is between 28C and 33C , rh is between 34rh and 40rh,

Additional info: i have topped the girls at day 18, and try to lst them.



Thank you.

 

[Yeatster]

Imo, raise your light. 11" is super strong, not good for an infirmary girl. I would suggest 20". Clear signs of over feeding.

Raise the light, lighten the feed. That's my 3 cents

 

[Sirro]

Thanks, i cant go higher with the light, my room is just 1 meter (3,2feet) high

 

[puggle6]

I think PH is your major issue, light intensity also, RH is ok, temp about max


thus ends my observations!

f6

 

[puggle6]

Make sure fresh air, 4"/100mm inline

Low speed inline, need fresh!


f6

 

[Sirro]

Thank you. What PH is good for soil? I gave between 6,3 and 6,7.

 

[namvet25]

6.5 is the the best number to shoot for but your close enough so that shouldn't be any problem.Is that cal/mag that is 4-0-0?Looks like a cal/mag def and maybe a phosphorous problem also.Are your nute doses per gal or litre?

 

[Sirro]

Hi,
yes the AN CalMag has 4-0-0 , sorry forgot to say, the dose is per Litre.

 

[Padawan1972]

Your leaves look almost like mine when I forgot to do final PH adjustment for 6.5. I feed them 7.2ph...48 hrs later they really showed signs that I screwed something up..flushed with PH'ed water with addition calmag included..damaged leaves remained but new growth unaffected. Went back to normal feeding schedule without additional probs.

 

[Waira]

Sirro -- I think there might be an in-pot pH problem, causing a lock out of micronutes,... this looks a lot like Mn deficiency, pretty rare,...

------- lockout can happen if the pH gets too high in-pot, (about 6.8+).. your input pH's should be in the low 6's, 6.7 is too high,.. might be then tap water is fairly hard, and the cumulative inputs of minerals (CaCO3) is starting to rise it,... only way to tell is to test it with a quality pH probe, or do the run-off test and calculation... this is not a very good method for accuracy, but we do have an improved method here in the highlighted section above this one; testing straight run-off is very questionable and crude in accuracy, but it can give a hint at if it's really far off in there... We need to determine if this is a simple lack-of Mn, or if the pH is off enough to lock it out (changes in chemistry make it unabsorbable),... the fix depends on this too! Adding more nutes to off-pH mediums can make matters worse, not better,... if it's a lack of, you may need a specialized supplement to deal with it,... if off pH, then the medium needs to be corrected to make what's there available again,... that may mean a flush with pH adjusted water, preferably low mineral content like distilled or RO water,...