Brown spots, yellowing and brown tips.

[R Wayne]

Do you have their ‘veg/grow’ bottle, also do you have their feeding chart

no ppm or ec.
View attachment 1393585

Good chance dis regarding everything ‘normal’, in regards to ppm/ec, I have no idea with this stuff.

If it were me and it’s all I had and had to use, I would only use the seablast and I would see if their suggested dosages line up with what would be expected for ec/ppm. It they did line up, I’d feed at 1.3 ec and that’s all

mix seablast at what they say is medium feed, if it’s near 1.6 ec (within 0.5) or so, make the mix 1.3 and feed. Otherwise just use something between medium and strong, closer to medium.

that what I would do, knowing nothing about the product

I think I will give this a try tomorrow, it's pretty damn close to the 2-1-2 you originally suggested. Do you think a flush is in order? Thank you for input btw, I really appreciate the help.

 

[Peacefulgarden]

I think I will give this a try tomorrow, it's pretty damn close to the 2-1-2 you originally suggested. Do you think a flush is in order? Thank you for input btw, I really appreciate the help.

maybe water with some run extra runoff, for the next few waterings. I don’t think you need to flush, it should be getting watered often enough that you ‘reset, the balance in the medium soon enough.

Only helpful if it helps, hope it does. I also hope you don’t buy their ‘grow’ per my suggestion. My suggestion would be to find really good info from people having success with them first or avoid all together. Unless the seablast works out well for you.

 

[R Wayne]

It's what I have so it's what I'll try. Not buying more bottles.... hopefully

 

[Bill.de.Cat]

Problem: large brown spots appearing on middle/newish growth. Burnt/deficient tips. Some yellowing as well.

Medium/grow method: FFOF on bottom 2/3 and FFHF on top 1/3. 20% perlite throughout.

Feed: and supplements used:
No grow, bloom or cal mag nutrients used until day 29

Stout MSA silica (5ml/gal every watering, started week 2 and stopped a couple weeks ago)

Earth Juice Seablast Grow 17-8-17(haven't used in a couple weeks now, used lightly from week 4 to week 6. I wouldn't be able to give you exact times)

Earth Juice Bloom 0-3-2 (started using 3ish weeks ago. Been feeding 5ml/gal once a week, 300ish ppm. Just fed 10ml/gal yesterday cause I thought possible phosphorus deficiency, 500ish ppm)

Earth Juice Assist a wetting agent (1ml/gal every other watering. The first application I used was 4ml/gal) was under watering for first month, soil became hydrophobic.

Earth Juice Cal N Mag 3-0-0 (5ml/gal used once a week sometimes twice a week) I'm now a little worried to use this because of the nitrogen in it.

Alaska PH down and up 0-0-47 (use down when using only water, use up when adding nutes, especially bloom)

Note: Amounts of EJ nutes have always been on the lighter side. Never fed heavy amounts of nutes. (That's why I'm leaning more towards a deficiency vs toxicity)

water source: tap that's been left out for at least 24 hours (80-90ppm) have always pH'd water to 6.3 - 6.5. At this point I water almost a Gal each every other day.

Strain/age: Larger plant with more brown spots is the Amnesia Haze Auto by ILGM, smaller girl is the Northern Lights Auto by ILGM. Both are starting their 8th week from germ. A week ago I super cropped the Amnesia Haze because she was growing to close to the light. But some life stuff came up and I wasn't able to buy more clothes pins to add weight (suggestion from a very respectful grower) so she grew right back up and is like 6in from light...or too close to the light.

light used: Mars Hydro TS 1000. 100% power.

Climate: Daytime temps range from 77-82. Nighttime from 72-77. Using a dehumidifier in my lung room (closet) so my RH stays between 45-55% throughout the day. One fan circulating air from floor and one just below the light. Also have 205cfm MH exhaust fan with carbon filter attached. All fans run 24/7.

Additional info: They are about 3ish weeks into flowering. The Amnesia Haze is a bit behind the Northern lights in bud and trichome development. I've only tested run off ppm once when adding grow nutes like 3 weeks ago and both came out 500-600ppm. I suck at taking pictures so please let me know if you need better ones. From what I've read and how little I've fed these girls in leaning towards possible phosphorus and cal mag deficiency. The brown tips confuse me. I thought nute burn at first, but like I said, I've fed these girls light nutes like once a week. ALSO I stuck my pH probe in the soil this morning and took pic of it after leaving it there for 15 minutes. I think my soil pH is ok. But I can't tell if it's 7.0 or 6.5

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PH meter looks to be reading 7.1-7.2, depending on accuracy could be in a range of high 6's to mid 7's. I use HF and ph my water to around 6, great for growth but when flowering starts it's a hot mess trying to keep em green. Good luck.

 

[Peacefulgarden]

PH meter looks to be reading 7.1-7.2, depending on accuracy could be in a range of high 6's to mid 7's. I use HF and ph my water to around 6, great for growth but when flowering starts it's a hot mess trying to keep em green. Good luck.

Kinda agree, 6 ph probably/possibly will help as well, depending your medium ph. Before I stopped growing a while back I was using , 5.7 just in FFOF because I had coco I was using the same (salt), nute mix for and it was really nice for me. Ty for helping me remember/motivating me to look into it myself more.

can't find anything on ground water ph the seems worth while, but most rain water stuff i see says it's 5.5ish. Not saying that means that cannabis wants that ph in soil, but I am going to be lowering my ph to 5.7, from 6.5 ish, in organic soil and see how the plants respond. Always makes me scratch my head thinking why it wants such a different ph in soil and hydro, doesn't really make sense to me and I haven't seen any testing, or side by sides on the topic either. I will do my own.

 

[R Wayne]

PH meter looks to be reading 7.1-7.2, depending on accuracy could be in a range of high 6's to mid 7's. I use HF and ph my water to around 6, great for growth but when flowering starts it's a hot mess trying to keep em green. Good luck.

Thank you and that's funny, I had a suspicion that my soil pH was too high. My recent feedings have been 6.0 to 6.3. I'll keep it closer to 6. I guess it'll be coco for my next grow, cheers

 

[Peacefulgarden]

Cannabis pH Chart & Guide - Autoflower Seed Shop

Because pH imbalance makes it difficult for the plant to absorb nutrients with its roots. pH levels need to be maintained to optimal levels.

autoflowerseedshop.com

This goes against pretty much everything I have seen up till now. But it does make sense to me, when comparing my hydro to my soil grows.

here is an interesting and maybe useful quote from it


Measuring pH
If you are reading this article, don’t use paper strips like in science class. You need to be more accurate than that. Any pool supply store and Amazon will sell you a pH meter for $10. Often times you can get a pH and ppm set (2 different meters) for $15 or less. This is a good purchase as ppm is another important factor in growing healthy cannabis plants.

To measure soil pH, water the plant thoroughly and measure the pH of the run off from the bottom of the pot. You want to measure the pH of the soil and then add water adjusted to the correct pH to balance the soil. For example, if you measure the run off water at 6.5, you will want to add water with a pH around 5.5 to bring the soil back into the perfect 5.8 – 6.3 range. The reverse would be measuring run off that measures 5.0. You would then need to add water at pH of around 6.5 or 7.0 to bring the pH of the soil back up.

end quote

 

[Peacefulgarden]

Thank you and that's funny, I had a suspicion that my soil pH was too high. My recent feedings have been 6.0 to 6.3. I'll keep it closer to 6. I guess it'll be coco for my next grow, cheers

If you can measure the soil of the ph is best, what you water with effects what the roots are sitting in but is not what the roots are sitting in.

According to the article I posted, measuring runoff will be good enough but I would suggest testing the medium itself, run off can be a little iffy imo.

 

[N/A-Greengo]

Add a little bone meal, and diatomaceous earth to the soil in the top 2-3 inches. Couple it with a Myco treatment, and it's a win, win.

 

[R Wayne]

So I tested my run off pH, the water going in was 6.0, the run off was 6.6. Does that make my soil 7.2? I have a cheap pH soil meter but I actually trust run off more.