Just Another New Guy

The way the leaves are clawing down and the darkness of the leaf I would have to guess over fertilizing. What was the npk ratio on the miracle grow?

MooseFarts said:

The way the leaves are clawing down and the darkness of the leaf I would have to guess over fertilizing. What was the npk ratio on the miracle grow?

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It’s 18-18-21

TheyHaveThc said:

this is a coco medium, ... quarter dose of MGrow

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Which MiracleGro fertilizer are you using?

EDIT: I see you said 18-18-21. That's "Tomato." That works with Cannabis. But, maybe not optimal with coco. See next paragraph.

If you're growing in coco (no soil), I think you should be using hydro nutrients. Soil nutrients may not work well. (But, it doesn't look like coco to me. Maybe it's just too wet and I don't recognize it. I've never grown in coco. What was the brand of the coco you used?).

TheyHaveThc said:

It’s 18-18-21

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You said you gave a quarter dose. What does the product say is a full dose?

I have grown cannabis from seedling to harvest using MiracleGro Tomato (18-18-21). I'm growing one right now, (<<link) in fact. However, I don't have the box anymore. (I put the fertilizer in an airtight plastic storage jar. So, I don't remember what the box said (how much t use). I do know 1/2 to 5/8tsp/gal is about the right amount. I fed as much as 1.2 teaspoon without burn, just N toxicity (which you show some too.).

It's hard for me to believe you've only fed once (quarter strength) and the plant looks that ovefed. I've got a feeling the medium your growing in isn't just coco. Maybe a coco-based potting mix which had nutrients already in it? (The 3rd photo shows a round something on the soil. Is that a time-release nutrient pellet? I was thinking it could be a seed shell. But, it doesn't entirely look like that.).

TheyHaveThc said:

And no I haven’t had an accurate way to adjust my ph. Don’t have a tester. But I’ve followed some guides on how to use slight amounts of vinegar to lower the ph.

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You're REALLY gonna want to find some way to test your pH, especially if you're not growing organically. Without knowing your water's starting pH, and exactly how your nutrients impact it, any guides you find will be kinda useless. I think you'd almost definitely need to know your actual pH to effectively buffer your medium with lime, but I've never really built soil so I may be wrong. When my last Amazon pH pen had me feeding battery acid to my Gorilla Glue autos, I said "never again!"

If money's an issue, you may wanna pick up some of this: https://www.amazon.com/General-Hydr...ph+test+drops&qid=1566187836&s=gateway&sr=8-5

That's what I use now. It's accurate, just not very precise. It will keep you in the right neighborhood, though.

az2000 said:

Which MiracleGro fertilizer are you using?

EDIT: I see you said 18-18-21. That's "Tomato." That works with Cannabis. But, maybe not optimal with coco. See next paragraph.

If you're growing in coco (no soil), I think you should be using hydro nutrients. Soil nutrients may not work well. (But, it doesn't look like coco to me. Maybe it's just too wet and I don't recognize it. I've never grown in coco. What was the brand of the coco you used?).

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its a coco soil mix

az2000 said:

You said you gave a quarter dose. What does the product say is a full dose?

I have grown cannabis from seedling to harvest using MiracleGro Tomato (18-18-21). I'm growing one right now, (<<link) in fact. However, I don't have the box anymore. (I put the fertilizer in an airtight plastic storage jar. So, I don't remember what the box said (how much t use). I do know 1/2 to 5/8tsp/gal is about the right amount. I fed as much as 1.2 teaspoon without burn, just N toxicity (which you show some too.).

It's hard for me to believe you've only fed once (quarter strength) and the plant looks that ovefed. I've got a feeling the medium your growing in isn't just coco. Maybe a coco-based potting mix which had nutrients already in it? (The 3rd photo shows a round something on the soil. Is that a time-release nutrient pellet? I was thinking it could be a seed shell. But, it doesn't entirely look like that.).

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you are correct with everything youve said, shouldi not feed it at all with the pre feed that is in the soil? How should i fix this?

Fangthane said:

You're REALLY gonna want to find some way to test your pH, especially if you're not growing organically. Without knowing your water's starting pH, and exactly how your nutrients impact it, any guides you find will be kinda useless. I think you'd almost definitely need to know your actual pH to effectively buffer your medium with lime, but I've never really built soil so I may be wrong. When my last Amazon pH pen had me feeding battery acid to my Gorilla Glue autos, I said "never again!"

If money's an issue, you may wanna pick up some of this: https://www.amazon.com/General-Hydr...ph+test+drops&qid=1566187836&s=gateway&sr=8-5

That's what I use now. It's accurate, just not very precise. It will keep you in the right neighborhood, though.

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i will buy a tester and some of that as a backup. Battery acid for these girts doesn't seem good.

If the soil is hot it will do this to your plants when they are young but they have potential to grow out of that stage and develop a root system that can handle that amount of nutrient uptake. So I’d wait and see if they get healthier.

TheyHaveThc said:

its a coco soil mix

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Without knowing what it said on the bag (the name; the selling points), it's hard to suggest what to do. If you had been overfeeding, the common suggestion is to cut the food in half, pour enough for 100% runoff (flush). But, if your soil has slow-release pellets (I think I see a couple laying on top), that could make it worse. You just have to ride it out. Don't overwater. Let the soil dry very well between waterings. Lift the container to judge how dry it is. It should feel very light when it's ready to water again.

MiracleGro Tomato (18-18-21) is good to use at 1/2 to 5/8 tsp/gal. It works fine. (I don't think cannabis is very particular about nutrients.). You can use it next time. Get some Black Gold organic potting mix (0.05-0.0-0.0) and perlite (be careful of MiracleGro's perlite. It has 0.07-0.07-0.07. You might have to rinse that before using it.). Mix Black Gold and perlite 50/50. The Miraclegro Tomato should work really well for you that way. The soil will have almost no nutrients. It will be fast drying.

TheyHaveThc said:

i will buy a tester and some of that as a backup. Battery acid for these girts doesn't seem good.

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Personally, I think testing ph in soil is pointless. If you don't overfeed, the soil ph seems to work itself out. (I haven't ph'ed my water/nutrients in 4-5 year years. Maybe it's specific to my soil and nutrients. But, I did have ph problems until I found the right strength to feed.).

The only reason I mention it is: the problem appears to be a nutrient-rich soil (probably time-release). I don't think ph'ing that will help. Most ph-up products contain nutrients. (They aren't labeled as such because they aren't sold as fertilizer.). So, if you try to control your ph, you'll be adding more salts to the soil.

Ph pens turn into a significant investment. You need calibration fluids, storage and cleaning fluids. If you're on a budget, that seems like an unnecessary expense when the soil is out of your control at this point. Next time, if you use a light soil, and feed lightly, ph shouln't matter. (Another thing you could do is soilless using hydro nutrients. You' need a ph pen for that. But, that's a good way to grow, removing the ambiguities of soil from the equation. It's just you, god and the roots. You supply nutrients directly to the roots without much dependence on the health of the soil. The medium just acts as a suspension for the roots. It dries fast. If you use Pro-Mix HP with 25% more perlite, you'd feed it every 2 days.).