Yellow leaves and curling, help a noob out :)

Here is a pic that shows 2 of the seedlings day 12 (left), 13 (middle) and 14 (right). The top row is all the same plant, and the bottom 3 are all the same plant. On day 10-11 I noticed the leaves were starting to turn yellow on all of my plants, some worse than others. By day 12 they were pretty yellow. I thought they needed some nutes it sounded like nitrogen def to me so I gave them 1/4 recommended dosage of fox farm grow big. Now on day 14 the leaves are starting to look burned.

I was watering once every other day, I would stick my finger in 3 inches and it would be completely dry. These are in jiffy pellet type things planted into 6 inch biodegradable pots. The soil is high quality from a local store with some perlite and vermiculite mixed in. I have a shitty 15$ ph meter that always registers between 6 and 7 on the soil. Im going to get something better soon because im not even sure if it is working right.

A couple of things I thought it could be are nute defeciency, bad ph (even though it looks good on my crappy meter i was thinking it could be the pellet things have a different ph), or possibly over watering. I was giving about 1/2 a cup on day 11 now up to 1 cup of water when i gave the 1/4 strength nutes on day 13. I only watered whenever it was dry which was about every other day.

Let me know what you guys think.

The soil is high quality from a local store with some perlite and vermiculite mixed in

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What is the brand of the soil? If it is a local mix, did they already add fertilizer to it?

I have a shitty 15$ ph meter that always registers between 6 and 7 on the soil.

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What is the pH of the water you are putting in the pots?

They said they did not add fertilizer it was just a high quality soil, I can double check this later today or tomorrow. The ph of the water was 7 and I left it out 24 hours to evaporate the chlorine.

are you adding nutes to every watering?
i would think about new, bigger pots also

i only added 1/4 dose of nutes one time on day 13. i have some 2.5 gal pots ready to transplant them into, you think I should go ahead and do that?

i would and you shouldn't need to nute alot yet, what are the nutes you are using?

fox farm grow big for now and i was going to switch to fox farm big bloom for flower

420x0245 said:

fox farm grow big for now and i was going to switch to fox farm big bloom for flower

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lol. i am buying the same stuff tom. morning!!LOL!!I never used it before but i hear it's good, so i can't help ya there with a dosage for that.
but i would def. go to the bigger pots asap. I think they will like it after a few days!!

they dont look that bad. looks like a nitrogen deficiency to me. i am a hydro grower myself. click through a few of these links. there are a ass load of pics of deficiency's and nute toxicity's and ph related problems. look through and identify the problem, the make a decision weather to flush (toxicity) or to add nute. (deficiency)

lots of people use the Fox Farms line, ask around, or search FF grows and see what they use, how much and when. i use a 2 part nutes system. seems so much easier than the 3,4 and 5 part nutes FF has. then again there tons of people who do use FF. so who knows, i may be sacrificing for simplicity.

do you use any micro nutes? zinc, iron, mang ect.

https://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html

http://www.ganjaguerrilla.net/

http://www.icmag.com/ic/showthread.php?t=11688

one more thing man. you can access the nutes that are already in the soil, by allowing a swing in the ph of the water. this is usually applied in hydro. before i flush or change the res, i may lower or raise the ph depending on what i think the problem is. then give it time to correct itself. here is a chart of the uptake of specific nutes at different PH levels. IE: so if you think its a zinc def you would lower the ph to uptake more zinc.does this make since?

http://www.avocadosource.com/tools/FertCalc_files/pH.htm

yelodrvr said:

they dont look that bad. looks like a nitrogen deficiency to me. i am a hydro grower myself. click through a few of these links. there are a ass load of pics of deficiency's and nute toxicity's and ph related problems. look through and identify the problem, the make a decision weather to flush (toxicity) or to add nute. (deficiency)

lots of people use the Fox Farms line, ask around, or search FF grows and see what they use, how much and when. i use a 2 part nutes system. seems so much easier than the 3,4 and 5 part nutes FF has. then again there tons of people who do use FF. so who knows, i may be sacrificing for simplicity.

do you use any micro nutes? zinc, iron, mang ect.

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I dont use micro nutes right now. Is tiger bloom micro nutes? I got the impression that tiger bloom wasnt really necessary, and i would only use it during flowering. I thought it was nitrogen def maybe caused by PH i guess ill get a better ph tester and see what's up before messing with any more nutes again.

the soil im using is a soiless mix called metro-mix 300 series growing medium. contains 30-40% horticultural grade vermiculite, bark, canadian sphagnum peat moss, horticultural grade perlite, bark ash, dolomitic limesteon (for ph adjustment of the materials in the soilless mix), and a wetting agent. I mixed 4 parts of that with 1 part vermiculite and 1 part perlite.

i got a fish water ph test kit it says it is for freshwater. it isnt really accurate because i have to compare the color to a chart but i can get a pretty good idea. tested my water and got:

Water going in
ph of 6.5-6.8
total alkalinity (KH) of 40ppm
total hardness (GH) 75ppm -1 00 ppm
nitrate (NO3+) 0ppm
nitrite (NO2-) 0ppm

Runoff
ph of 6.4-6.6
total alkalinity (KH) of 30ppm - 50ppm
total hardness (GH) of 75ppm
nitrate (NO3+) 20ppm
nitrite (NO2-) .2ppm - .3ppm

Most of the seedlings are a little yellow, just one looks pretty bad. The closeups are of the worst one, which is the top one in the original image. I am moving them to bigger pots now and will water with no nutes once i get them in. What do you think is going on? It looks like the PH was always fine, the plants are growing, but this one has a dying leaf and the others are still a bit yellow.

Theres also a pic of all of them so you can see what it looks like for each one.

420x0245 said:

They said they did not add fertilizer it was just a high quality soil, I can double check this later today or tomorrow. The ph of the water was 7 and I left it out 24 hours to evaporate the chlorine.

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If theyre saying that then there must be some slow release nutes in the soil. Your water going in and runoff show that your soil is getting nitrates from somewhere, which adds to the premise that it is pre nuted soil.

Are you letting them dry up or do you just water every day on schedule... It kinda look as if it is lacking some nutes or the ph of the water isn't letting it accept the nutes.....

Jonus said:

If theyre saying that then there must be some slow release nutes in the soil. Your water going in and runoff show that your soil is getting nitrates from somewhere, which adds to the premise that it is pre nuted soil.

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I gave them 1/4th strength nutes 3 days ago and the bag of soil doesnt say anything about slow release nutes.

Smot360 said:

Are you letting them dry up or do you just water every day on schedule... It kinda look as if it is lacking some nutes or the ph of the water isn't letting it accept the nutes.....

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I let them dry up before watering. In those small pots it was about every other day. With my water in and runoff PH's would you say there might be a PH problem? the PH looks perfect to me.

Ya its gotta have something to do with the ph of your soil when the nutes are added than.....