Phosphorus deficiency?

papa canna

papa canna

Well-Known Member
I noticed this about 3 days ago. I've been vegging for about 5 weeks, so they are a nice good size, I've only had to feed them 2 or 3 times thus far. But this is affecting the lower fan leaves quickly.

Grown in 2 parts sunshine adv. #4
1 part perlite
1 part RO green lite (charged peat)
1 part EWC
Using 600w mh
Fed a light formula of dynagro FP and protect.
0601171615a.jpg 0601171615.jpg
 
Dr. Who

Dr. Who

Well-Known Member
God Poppa, I wana say check your in-going pH.....

Are you adding a Ca/Mg to that RO and Coco? Coco needs more ca anyway, but I hesitated answering, cause I felt you knew that...
FP at what concentration?
Si - That's ok with Coco......Could be that's whats wacking the pH out too. Strong pH up it is....

Anyway, no one's helping - thought I might ask those questions and see....
 
papa canna

papa canna

Well-Known Member
Dr. Who said:
God Poppa, I wana say check your in-going pH.....

Are you adding a Ca/Mg to that RO and Coco? Coco needs more ca anyway, but I hesitated answering, cause I felt you knew that...
FP at what concentration?
Si - That's ok with Coco......Could be that's whats wacking the pH out too. Strong pH up it is....

Anyway, no one's helping - thought I might ask those questions and see....
Click to expand...
I have only added calmag once. I hear contradicting info. Vets like homebrewer saying its unnecessary when running DG. others say its an absolute must. I water with Ph'd tap water. 5.8 - 6.2 always. Feeding 1 mL of Foliage pro per gallon. protekt also at 1 mL per gallon. But I have only fed FP about 3 times now and i probably vegged for about 6 weeks. Just flipped into flower on sunday. It wouldnt surprise me to be a def given that i've only fed them a few times.
 
G

goldberg71b

Well-Known Member
The soil looks really dry. Personally I would not flip until you got new healthy growth. Even if that means topping or training. Feeding 3 times over 6 weeks of veg doesn't seem like enough to me. If you only giving them RO water other than the 3 feedings. To much RO water could be the issue. I never give my plants RO water only until the last 2 watering at most. I prefer just to decrease ppm. Now I'm not familiar with your soil depending on what's in it RO water might not be that bad. I'm in soilless mix so RO water alone is a no go for me. If I don't want to add anything I'll let tap water sit out for 24 hour and use that over RO water.
 
papa canna

papa canna

Well-Known Member
goldberg71b said:
The soil looks really dry. Personally I would not flip until you got new healthy growth. Even if that means topping or training. Feeding 3 times over 6 weeks of veg doesn't seem like enough to me. If you only giving them RO water other than the 3 feedings. To much RO water could be the issue. I never give my plants RO water only until the last 2 watering at most. I prefer just to decrease ppm. Now I'm not familiar with your soil depending on what's in it RO water might not be that bad. I'm in soilless mix so RO water alone is a no go for me. If I don't want to add anything I'll let tap water sit out for 24 hour and use that over RO water.
Click to expand...
I dont use RO. I use tap water. The top growth looks fantastic. and overall health they are doing quite well. those pics are at the very bottom
 
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