Mephisto Grow - when to lower RH/is this calcium deficient?

[Ryno_nuggs]

Hey man. Like he said, fox farms is hot. You honestly shouldn't need any calmag with fox farms and now biotabs. That certainly seems like the issue. Certain nutrients in excess will lock out other nutrients.

I would stick to water only. You might not need to add much at all the rest of the way. Maybe mid flower depending on what size pots you are using.

Good luck!

 

[Proph]

Just keep in mind that what you checked was not the soil ph. Soil ph and feed/water ph are totally separate things. Ocean Forrest like all bagged soil, is buffered to stay at a ph of 7. A compost tea will not effect or change a soils ph. To check the ph of the soil you need a soil ph probe, like a Kelway. They start at around $80. Also, you do not need to ph water if you aren't adding npk nutrients. Mephisto doesn't grow in ocean forrest. You want to consider all of the variables when following a guide. The yellowing of the new growth is not light burn/stress. It's a symptom of the nutrient imbalances. Issues with immobile nutrients start with new growth and upper leaves and works it's way down the plant.. Issues with mobile nutrients start with older/bottom leaves and works it's way up the plant. With two bio tabs and ocean forrest you should definitely be using plain water. Bio tabs are a slow release product.. You don't know which nutrients are being released, or when they're released, or how much is being released.. So keep that in mind as the weeks pass. Lock out issues due to imbalances and/or excess nutrients, look exactly like deficiencies. But they aren't. The nutrients are still present in the soil, but they are not available to the plant. So adding more, only adds to the build up. I can only imagine all of the conflicting information out there.. Sheesh.. It's gotta be head spinning. But the beauty of gardening, is that it's science based, not opinion based. If You follow the science you'll be better off, trust me, lol. Personally, rarely ever post an opinion, unless asked. And even then I base it on science. Less is more when growing autos.. That's the best advice I can give.. You really don't need to do much at all.. The plant will be dead in 2 1/2 months or less. In a 5 gallon pot, Ocean Forrest has enough food to get at lest 4-6 weeks with water only.. So you may only need very light feeds here and there in the last month. Most new growers start adding extra stuff early and often and see issues soon after. A true deficiency is super easy to fix! Just add what's missing.. A true imbalance or lock out is super hard to fix. You can't simply remove extra calcium or potassium. Less really is more.

 

[Proph]

@Proph - do you generally suggest to people not to use tap water given that it has calcium and magnesium in it? Just straight RO?

It totally depends on their grow style, and if they are using a nutrient line. I would recommend RO if you are mixing nutrients. Tap water can be high in anything from calcium to metals so I wouldn't mix nutrients in tap water unless I had a local water report and new exactly what was in the water.

 

[StankOfMyDank]

All of y’all are awesome, thank you for all the wisdom! We’re going straight water from here on out. Appreciate you all

 

[StankOfMyDank]

@Proph i did check soil pH though! I have a water and soil pH pen from blue labs. That was how I got the 5.8 figure from the soil and the 6.8 from my Hygrozyme/distilled water mix. Definitely going to make sure I keep an eye on it moving forward.

 

[Proph]

@Proph i did check soil pH though! I have a water and soil pH pen from blue labs. That was how I got the 5.8 figure from the soil and the 6.8 from my Hygrozyme/distilled water mix. Definitely going to make sure I keep an eye on it moving forward.

Ok. But a compost tea will not raise the ph of soil. If it did, we'd have to ph compost teas every time before use. So even if the soil ph probe read 5.8. Adding a compost tea wouldn't raise the soil ph. The science is that using a tea won't raise the ph of soil.

 

[StankOfMyDank]

Ok. But a compost tea will not raise the ph of soil. If it did, we'd have to ph compost teas every time before use. So even if the soil ph probe read 5.8. Adding a compost tea wouldn't raise the soil ph. The science is that using a tea won't raise the ph of soil.

Understood. I just wanted to raise the point that pH could have been causing some of the nutrient lockout. I didn’t bother pH checking the tea for the reasons you mentioned, just the water/Hygrozyme mix. All info is good info! I’m an engineering technician by discipline so this sort of attention to detail is by design lol

 

[KodakB]

Root zone acidified could be caused by an excess of potassium but since its organic im not sure if that "rule" applies, so dont quote me on that. Excess K also causes Calmag lockout.

Anyways just leaving this here

 

[Djamiryo]

n abundance in plant causing calcium lockout.happens to me when I use sugar royal every feeding in coco,instead of following the bottle instructions,says use it once a week.but you are using a hot soil.looks like that strain is sensitive as it happened in such an early stage. I want full control on my feedings,coco is great for that.no nutes,you feed the plant but I'm going synthetic.sounds chemical I know but smokes good right now. this killer a5 haze,real killer,no joke