This is a Mephisto HBSS in a 3 gallon fabric pot with fox farms happy frog. I'm feeding 3.5g per gallon Mega Crop and 3ml per gallon CalMag. Its in a 2x4 tent with two other plants and one AutoCob per plant running 24/0. Any thoughts on the brown blotches on the leaves?
Brown Patches on Mephisto HBSS
- Thread starter rydin4life
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While you wait for more seasoned responses, I'll toss around an idea = phosphorus deficiency, possibly caused by excessive Cal-Mag application or just need a booster (maybe a tad low on the MC for early flower).
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Looks like P defc. to me as well, but the why is the question,... most likely it's a simple lack of, knowing MC and that dosage level, but your in-pot pH must be checked to see if that's off... Too acidic and P locks out,....
...do check pH going in? What's you water like for pH and ppm?....extra Ca-Mg isn't necessary all the time, and party depends on the water hardness,... hard water + too much Ca-Mg can indeed start to cause problems with uptake of other nutes if it builds up cumulatively,...
You'll need a decent pH probe made for in-pot measurements; run-off is bollocks for accurate pH,... a crude estimation can be had using RO/Di water, with a pint or so of run-off and sample collected at the end, not at the beginning.... the Accurate 8 is fine, or the equivalent, it's under a few brands now, same unit, different name and pricing.... just don't bother with the cheapo skinny probe or combo meters, next to useless!
I'd take her off 24/0, trust me, it's not worth it unless you have everything else DIALED in,.. more is not better even with light, they can utilize only so much per day,.... 20/4 or 18/6 is fine,....
...do check pH going in? What's you water like for pH and ppm?....extra Ca-Mg isn't necessary all the time, and party depends on the water hardness,... hard water + too much Ca-Mg can indeed start to cause problems with uptake of other nutes if it builds up cumulatively,...
You'll need a decent pH probe made for in-pot measurements; run-off is bollocks for accurate pH,... a crude estimation can be had using RO/Di water, with a pint or so of run-off and sample collected at the end, not at the beginning.... the Accurate 8 is fine, or the equivalent, it's under a few brands now, same unit, different name and pricing.... just don't bother with the cheapo skinny probe or combo meters, next to useless!
I'd take her off 24/0, trust me, it's not worth it unless you have everything else DIALED in,.. more is not better even with light, they can utilize only so much per day,.... 20/4 or 18/6 is fine,....
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Thanks guys. I checked my ph in and was at 6.6 and out was 6.2 so the soil ph may have been too low. I'll continue to check runoff to be sure of how things progress.
Side note..have either of you ever used Mammoth P? Picked up a free sample tonight and am curious about it.
Side note..have either of you ever used Mammoth P? Picked up a free sample tonight and am curious about it.
I have but can't say anything definitive, just used it where/how suggested for the positive-biome support. I believe the main differentiator claimed in that Mammoth P's work to make P more available. But currently I'm using Fish Sh!t and ReCharge (+Sweet Candy) and they seem to like those a lot too and that's about as much feedback as I'm able to get for this type of additive - healthy roots and happy plants.
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