seedlings with yellow leaves , overwatering?

prop · May 5, 2023

new to this. last year i had some plants a friend gave me and i had a good yield. while cleaning one of the plants during harvest a had some seeds falling out, so it must have been a herme. i germinated the seeds and transplanted them and got some multi spectrum grow lights off amazon. most of the plants are doing ok but i have a couple that are kinda yellow. i have been trying different times on the lighting 12-16 hrs a day. too much or too little water? too much or to little light? full spectrum or not?i`m in the suburbs of n.y. and it has been pretty cool and wet so far , so i guess it will be quite awhile until i can transplant outdoors. just wondering how long it takes to get to a safe height to transplant. this is one of the smaller ones. overwatered?

prop · May 5, 2023

here is my setup

mysticepipedon · May 5, 2023

Looks like they're getting fried by the light.

Watering: water when the soil is nearly completely dry. Water until all the soil is wet (ALL!), then don't water again until they're nearly completely dry.

No misting, no staring at them, wondering how you can help, no feeding in the first week to 10 days.

prop · May 5, 2023

yeah i figured i over watered but only a couple are like that. what about light, full spectrum or just white? 12 hours?

Eledin · May 5, 2023

mysticepipedon said:
Looks like they're getting fried by the light.

Watering: water when the soil is nearly completely dry. Water until all the soil is wet (ALL!), then don't water again until they're nearly completely dry.

No misting, no staring at them, wondering how you can help, no feeding in the first week to 10 days.

Are you sure the lights are doing damage? Those lights are very low Wattage and I have them on the sides of my tent, sometimes a leaf might be literally touching them without me realizing for a few days and the leaf is okay. Yes to everything else you said but Im not sure about the lights being a problem.

Eledin · May 5, 2023

prop said:
yeah i figured i over watered but only a couple are like that. what about light, full spectrum or just white? 12 hours?

Youre using only water right? No feeding. If youre using tap water, youre letting it rest for a day so it can evaporate the chlorine? How many Watts is that set of led bars? Id go full spectrum, if you put the veg mode only white will turn on and you will lack red which is still important in germination and veg, not only bloom.

alpha.ganjaguy · May 8, 2023

What soil are they in?

Eledin · May 8, 2023

About the hours, 18/6 is what I use for photos then 12/12 when you wanna switch to flower. For autos I use 20/4 all grow.

GNick55 · May 8, 2023

Eledin said:
Youre using only water right? No feeding. If youre using tap water, youre letting it rest for a day so it can evaporate the chlorine? How many Watts is that set of led bars? Id go full spectrum, if you put the veg mode only white will turn on and you will lack red which is still important in germination and veg, not only bloom.

most cities don’t use chlorine anymore they use chloramine.. also letting it sit out a day will not evaporate the chlorine, needs a week for a 5 gallon pail..
no need to let it sit out anymore..

Eledin · May 8, 2023

GNick55 said:
most cities don’t use chlorine anymore they use chloramine.. also letting it sit out a day will not evaporate the chlorine, needs a week for a 5 gallon pail..
no need to let it sit out anymore..

True, the bigger the container the more time it has to sit open but the minium recommended is 1 day and a big part of it should be gone by that point, even if the water is cold, but the warmer it is the sooner it happens. I wait til the water comes hot and then I usually wait 3 days at least because even tho most of it evaporates in 1 day I dont wanna mess with my microbes. In Spain we still use chlorine everywhere, I didnt know that in some places in the US theyre not.

Eledin · May 8, 2023

I was just reading about chloramine cause is the first time I hear of it, I guess they changed it cause its less harmful to humans and the enviroment? Bad thing is it doesnt evaporate so your plants are gonna drink it and your microbes are gonna get hurt no matter what you do x_x

alpha.ganjaguy · May 8, 2023

IKIK, tldr but..

""
Q: There's been talk about local water suppliers treating water with chloramine instead of chlorine. The proponents of this process seem to say there is little detrimental effect. But I read on one web site that chloramine "does nasty things to microbes in soil." Do you have any information on what this will mean to gardeners?

A: Excellent question. The point of using chloramines (a combination of chlorine and ammonia) is to kill harmful bacteria in drinking water, so it's logical to assume that irrigating plants with chloraminated water will do some damage to bacteria in the soil - including bacteria helpful to plant growth.

The question is whether it's going to do enough damage to cause plant problems. My gut feeling is no - with a couple of caveats and possible exceptions. Some thoughts that struck me while wading through the research...

1.) Chloraminated water has been used for at least 90 years in the U.S. and abroad. If it was going to cause trouble in the garden, someone should have noticed by now. Here's what one study from Australia's Urban Water Research Association concluded: "It seems unlikely that the use of chloraminated water for irrigation of soil-grown plants would have adverse effects on growth, whether the water is applied directly to the soil or as an aerial spray."

2.) Soil-borne bacteria are pretty resilient and plentiful. The chloramine levels used in treated water shouldn't make more than a dent in the soil bacteria population. And I suspect the bacteria would quickly bounce back.

3.) Any ill effects would depend on how much chloraminated water you applied and how often you applied it. Rain would dilute and leach the chloramine out of the root zone, so plant damage (if any) would be more likely in droughty weather. I'd be more concerned about container plants, which would get daily and focused doses of chloramine throughout the growing season. Symptoms would be browning around the leaf edges and possibly yellowing of the leaves.

4.) The other area of concern is in water gardens. Fish are sensitive to chloramine as well as chlorine. But unlike chlorine that dissipates in a day or two, chloramine persists longer (a trait that also makes it more attractive in treating drinking water). If you're lightly topping a pond with chloraminated water - say, by less than 5 percent of volume - you're unlikely to harm fish. But if you're replacing the water or adding more than 5 percent, you should go to the pet store or pond supplier and buy a product that neutralizes chloramine. Carbon and biological filters also gradually remove the ammonia that's a component of chloramine.

5.) If you're making compost tea with chloraminated water, that's likely to destroy some of the bacteria, which is one of the main benefits of this fertilizer in the first place. You can neutralize the chloramine by mixing 1 teaspoon of humic acid per 100 gallons of compost tea, according to one company that makes compost-tea brewers.

A good way to sidestep this whole issue is to collect your own rain water and use that as much as possible. Also helpful would be adding compost regularly to your soil, which is loaded with beneficial microorganisms.""

alpha.ganjaguy · May 8, 2023

Eledin said:
True, the bigger the container the more time it has to sit open but the minium recommended is 1 day and a big part of it should be gone by that point, even if the water is cold, but the warmer it is the sooner it happens. I wait til the water comes hot and then I usually wait 3 days at least because even tho most of it evaporates in 1 day I dont wanna mess with my microbes. In Spain we still use chlorine everywhere, I didnt know that in some places in the US theyre not.

A quick search shows that Spain uses Chlorine, Chlorine dioxide, Chloramines and Ozone for water purification

Brotofsky · May 8, 2023

Get rid of the burple and use fluorescent lights with seedlings, then you can put them right over the sprout!! The photo is 2.5 weeks from germination under cheap dual fluorescent grow bulbs. Good luck!!

Eledin · May 8, 2023

alpha.ganjaguy said:
IKIK, tldr but..

""
Q: There's been talk about local water suppliers treating water with chloramine instead of chlorine. The proponents of this process seem to say there is little detrimental effect. But I read on one web site that chloramine "does nasty things to microbes in soil." Do you have any information on what this will mean to gardeners?

A: Excellent question. The point of using chloramines (a combination of chlorine and ammonia) is to kill harmful bacteria in drinking water, so it's logical to assume that irrigating plants with chloraminated water will do some damage to bacteria in the soil - including bacteria helpful to plant growth.

The question is whether it's going to do enough damage to cause plant problems. My gut feeling is no - with a couple of caveats and possible exceptions. Some thoughts that struck me while wading through the research...

1.) Chloraminated water has been used for at least 90 years in the U.S. and abroad. If it was going to cause trouble in the garden, someone should have noticed by now. Here's what one study from Australia's Urban Water Research Association concluded: "It seems unlikely that the use of chloraminated water for irrigation of soil-grown plants would have adverse effects on growth, whether the water is applied directly to the soil or as an aerial spray."

2.) Soil-borne bacteria are pretty resilient and plentiful. The chloramine levels used in treated water shouldn't make more than a dent in the soil bacteria population. And I suspect the bacteria would quickly bounce back.

3.) Any ill effects would depend on how much chloraminated water you applied and how often you applied it. Rain would dilute and leach the chloramine out of the root zone, so plant damage (if any) would be more likely in droughty weather. I'd be more concerned about container plants, which would get daily and focused doses of chloramine throughout the growing season. Symptoms would be browning around the leaf edges and possibly yellowing of the leaves.

4.) The other area of concern is in water gardens. Fish are sensitive to chloramine as well as chlorine. But unlike chlorine that dissipates in a day or two, chloramine persists longer (a trait that also makes it more attractive in treating drinking water). If you're lightly topping a pond with chloraminated water - say, by less than 5 percent of volume - you're unlikely to harm fish. But if you're replacing the water or adding more than 5 percent, you should go to the pet store or pond supplier and buy a product that neutralizes chloramine. Carbon and biological filters also gradually remove the ammonia that's a component of chloramine.

5.) If you're making compost tea with chloraminated water, that's likely to destroy some of the bacteria, which is one of the main benefits of this fertilizer in the first place. You can neutralize the chloramine by mixing 1 teaspoon of humic acid per 100 gallons of compost tea, according to one company that makes compost-tea brewers.

A good way to sidestep this whole issue is to collect your own rain water and use that as much as possible. Also helpful would be adding compost regularly to your soil, which is loaded with beneficial microorganisms.""

Thanks! Thats a lot of good info. Im still worried tho because I grow indoors in pots and I assume the soil bacteria is not that plentiful, specially since I use tarantula and piranha which comes with microbes that are not already in the soil. It seems to focus more on gardens and big plantations rather than individual pots not connected to the ground. It also mentions rainwater which I dont get and cant collect but I usually use bottled water mixed with the tap water because depending on where you live they add more, and where I live tap water is really bad, tastes awful, too many farms around so Im very paranoid about hurting my microbes or plant with "dirty" water, specially when I recently applied them, I dont care as much at the end of the grow but I still let it evaporate, I just use less bottled water or none.
EDIT: Yes, I know that bottled water has microplastics in it, but is still way less ppm than tap water with a lot of undesired stuff.

Eledin · May 8, 2023

alpha.ganjaguy said:
A quick search shows that Spain uses Chlorine, Chlorine dioxide, Chloramines and Ozone for water purification

Must be somewhat new, it was only used in swimming pools. I did search now and it seems that at least 1 out of 17 autonomous communities (Madrid in this case) uses both. Catalonia, where I live, unless its outdated info, only uses chlorine, I did a google search now to know for certain cause I use that water. I would do it even if I lived in Madrid cause at least I can get rid of the chlorine which is also present in tap water.

alpha.ganjaguy · May 8, 2023

You should be able to (I am assuming here as we can in the US) reach out to your local water supplier for a water report.

There's never anything wrong with being extra careful but generally speaking it won't effect plants in a major way

Eledin · May 8, 2023

alpha.ganjaguy said:
You should be able to (I am assuming here as we can in the US) reach out to your local water supplier for a water report.

There's never anything wrong with being extra careful but generally speaking it won't effect plants in a major way

Oh god I think Id rather not know hahaha. People in the city I live avoid tap water at all costs, just by the taste you can tell its awful. Thats also why I mix it with bottled water, its not just the higher ammount of chlorine, Im pretty sure theres way more stuff in there because I know how chlorine tastes and ith as that flavor plus others that I cant identify.
EDIT: In some cities tap water is very drinkable but usually in heavy farm zones is awful.

The_word · May 8, 2023

Eledin said:
Must be somewhat new, it was only used in swimming pools. I did search now and it seems that at least 1 out of 17 autonomous communities (Madrid in this case) uses both. Catalonia, where I live, unless its outdated info, only uses chlorine, I did a google search now to know for certain cause I use that water. I would do it even if I lived in Madrid cause at least I can get rid of the chlorine which is also present in tap water.

I live in La Rioja (in a city) and tested my water before this grow. Was absolutely fine. Almost 0 chlorine and soft water

Eledin · May 8, 2023

The_word said:
I live in La Rioja (in a city) and tested my water before this grow. Was absolutely fine. Almost 0 chlorine and soft water

Yes I used to live in a city near Barcelona (Rubi) and tap water was drinkable but since I moved north to the rural areas the water is awful. I think that just by tasting it you can tell when tap water is drinkable, unless youre used to drink heavy treated tap water only. I should ask for a report but I know its not gonna be good...

seedlings with yellow leaves , overwatering?

seedlings with yellow leaves , overwatering?

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