Brown Crunchy Spreading

jpknowmad

jpknowmad

Member
I have 2 northern lights from Nirvana. They are 24 days into flower. There is some rusty colored stuff that is spreading on the leaves of one of the two. I got a few pics, hope they help. They are under 2 600hps bulbs in 7 gal smart pots, and I'm using Jacks 15-5-15 4Ca2Mg. I am almost positive they aren't overfed. I don't think it could be a cal problem either with the high amount in the jacks. What do you guys think? I have flushed with 15 gals after first notice, and a week later after no improvement I gave them 2tbsp per gallon of jacks. Just went back to 1tbsp per gallon today. Ocean Forest soil. Temps stay between 69-76, ph is 6.5
 

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riddleme

riddleme

Well-Known Member
2 tablespoons? really???

most I have ever fed was 1.5 teaspoons to a gallon, and that is STRONG
 
withoutAchance

withoutAchance

Active Member
whats the ppm of the nute solution? prally should be 800-1300 24 days into flower. and the n-p-k should be 1-2-3 like 5-10-15 yours is 3-1-3(15-5-15) not that good for flowering prally should use something else, need more betails to help any further.
 
jpknowmad

jpknowmad

Member
yea, i usually stick with one, but was seeing if the extra cal or phos in the 2 tbsp would help. Any ideas?
 
riddleme

riddleme

Well-Known Member
there is no problem with a 15-5-15, I just finished a grow using only 20-10-20 all the way thru

but a table spoon is too much, flush again, wait 4 or 5 days feed with 1 TEA SPOON to a gallon and watch new growth for signs of improvement, the damage will not get better but should stop

FFOF is a hot soil, adding 2 tablespoons of chem nutes to it is way overkill,,,,remember always less is more
 
brownbearclan

brownbearclan

Active Member
I'd agree with the comments so far, nutes are too strong and are a funky blend for flowering. Imo a better ratio for flowering would be a low number, highest, then a middle, so something like 5-15-10. =)
 
jpknowmad

jpknowmad

Member
im not worried about ratios but thanks for the help anyway. I'm using 15-5-15 full cycle. I'm gonna be following riddleme's recs and flush then reduce to 1 tsp per gallon
 
Lord Dangly Bits

Lord Dangly Bits

Well-Known Member
Hey there JPK,
I just need to ask. Do you own Stock in the electric company? Why are you using two 600 watters on just 2 plants? When the lights go out, do your plants glow in the dark for a while? :shock:
You could put a dozen plants under those lights easy.
 
jpknowmad

jpknowmad

Member
Thats not all that is under there, i have some others that are about 10 days from harvest, these were just two late arrivals that joined the others
 
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