Yellowing on a Sprout

snowman4839

snowman4839

Well-Known Member
I started noticing this a day or two ago and I wanted to see if it was a problem and try to catch it early. I have two white widow sprouts and I just transplanted this one out of miracle grow moisture control to my soil mix which has much better drainage (vemiculite-like rock and perlite mixed in) and a bit of 5-3-3 nutes mixed in. I left the other one in the MG moist. control so I could compare their growth in the same environment.

ANYWAY... I started noticing some yellowing on the tips of the rounded first set of leaves and it also has a weird dark spot on the first set of fan leaves. I don't think it has to do with the soil because it was there before the transplant and the other one doesn't have any yellowing on it but it has a odd brown spot on the tip of one of its rounded leaves. I've been watering with around 7.4 pH straight water and it has no nutes in it. the runoff has been about 6.8 pH. Any ideas? I think it's either nute burn or N deficiency but I don't get why either would show up this early... or is this just normal?

Plant in my soil...
Yellowing on the tip

Weird dark spot


Plant in MG moisture control...
Odd brown spot (I had a hard time getting it to focus. it's on the leaf in the out of focus part near the center of the picture)
 
thexception

thexception

Well-Known Member
common nute burn for tiny sprouts in nutrient soil, should go away soon, if u r worrying about the slightest things now u r going to drive urself crazy with the grow
 
snowman4839

snowman4839

Well-Known Member
Well this is my second set of grows. Last grow, I got pretty far but one of my leaves starting getting necrotic and I just kinda ignored it and poured some epsom salt water in because it looked like Mg def. and then half of my plant starting getting necrotic. Then in a rush to revive it, I flushed it and my pH meter wasn't reading correctly so both plants in that pot died from overwatering and crazy pH wackness. It just sucks because my big one was coming up on 3 weeks old so the only thing I got out of that is dead plants a little bit of experience. I still don't know if it was from nute lock, pH lock, or actual deficiency. You have any tips on how to tell the difference between the three?

I just really don't want to have to go through that again... it wasn't fun at all...
 
grobofotwanky

grobofotwanky

Well-Known Member
If your control plant is just as bad as the plant in your soil, I'd say its an issue with drainage or over/underwatering. Somewhere in that area. Just a guess though.
 
snowman4839

snowman4839

Well-Known Member
Well the pH is fine in both, my soil has great drainage, and the miracle grow retains water well. I've gotten a plant to week 3 in the miracle grow fine without these symptoms.
 
thexception

thexception

Well-Known Member
yeh that must of sucked at week 3. Only way to figure these things out (deficiency vs lock out) is with experience & thinking clearly about what you did before the onset & after. Again these are just babes, cotelon eventually going to yellow & fall off anyway. Nute burn spot really doesnt look like it is getting bigger, just appears that way because leaf is growing bigger. And even if u r getting more nute burn which it doesnt appear to be, nothing u can do at this point short of removing the plant from this soil. u might do better watering with distilled water at this point. Water as little as possible at this stage, you can even simply stick to heavily spritzing top of soil when dried out for probably at least another several days before regular watering. Again, if you have any nutes in soil, water=release of them which little gal doesnt need right now. Do NOT add anymore nutes for awhile, honestly I would not even think about it before week 3, better week 4 as long as leaves are mainly green & everything else looks good.
 
Canibal

Canibal

Well-Known Member
Notice the pattern of green on the plant the top growth is dark green, middle light green and yellow on the bottom. Classic nitrogen deficiency, the plant is pulling nitrogen into the new growth.
 
snowman4839

snowman4839

Well-Known Member
can I dissolve some nitrate of soda into a spray bottle and foliar feed a minuscule amount to it to correct lacking N?
 
urgod

urgod

Well-Known Member
looks like ph lock out to me for some reason. i had the same problem with one of my seedlings growing in rockwool since i didnt soak it in 5.5 acid before dropping the seeds in. my seedlings had stunted growth and yellowing cotyledons until i figured out the problem and readjusted my PH.
 
urgod

urgod

Well-Known Member
your PH should be slightly acedic. if you are growing in soil it should be around 6.5ish
 
snowman4839

snowman4839

Well-Known Member
urgod said:
your PH should be slightly acedic. if you are growing in soil it should be around 6.5ish
Click to expand...
that's where I get lost with pH balance in soil. If you water it and you get the pH wrong, do you just let your plant grow in fucked pH til it time to water again? or do you just keep adding water til it corrects the pH?
 
urgod

urgod

Well-Known Member
you should premix the water you are going to use to water the plant. make it 6.0 pH. then you can flush your soil. collect the runoff and measure the PH. this way its harder to F it up. do this everytime you water. so your PH is relatively the same
 
urgod

urgod

Well-Known Member
i recommend u adjust the PH first, if it doesnt green up within a few days then add some quarter strength nutes
 
snowman4839

snowman4839

Well-Known Member
well I just made my water mix have a pH of 6.6 so should I just go ahead and water the already watered plants or should I wait and let them keep growing in the f*cked up soil until the soil is dry before I water.
 
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