Stalled seedlings and yellow tips

What’s going on? Seedling stalled starting to get yellow tips. Cotyledpns are yellow too.

All others are fine. Just a bad seedling?

We would need a bit more details to help out buddy.

How old are your plants, which strain, which medium, which lights and at what distance, watering schedule, feeding schedule (although this should not happen with a seedling if you growing in soil). I only start 1/2 feeding plants in soil at 4 weeks.

Outdoors, indoors?

Yellowing of leave could be a N deficiency, although at seedling stage i doubt it.

So my guess is likely a PH issue locking out nutrients or over feeding of nutes.

I have never seen such a thing as bad seedling - The seed is either good or bad, if its bad then no plant pops out but if its good then you should have a healthy plant. The only thing that would make it unhealthy is humans.

Indoor
315w cmh 44” away
Fox farms ocean and happy frog 50/50 mix with 1/3 perlite added

Watering is 125 ml or half a cup every 3/4 days. Strain is
Freedom of seeds godberry and 00 seeds chocolate kush.

My purple haze, blue Medi Kush and bubblegum are happy. Blue Medi was slow but now taking off. Was slightly overwatering in beginning.

Purple haze has 3 nodes and 9-10 leaves over all, same with bubblegum. This photo was a few days ago and the yellow has spread ever further

Aviatorshades said:

Indoor
315w cmh 44” away
Fox farms ocean and happy frog 50/50 mix with 1/3 perlite added

Watering is 125 ml or half a cup every 3/4 days. Strain is
Freedom of seeds godberry and 00 seeds chocolate kush.

My purple haze, blue Medi Kush and bubblegum are happy. Blue Medi was slow but now taking off. Was slightly overwatering in beginning.

Purple haze has 3 nodes and 9-10 leaves over all, same with bubblegum. This photo was a few days ago and the yellow has spread ever further

Click to expand...

Ok, so if you not adding nutes then we can disregard the nute burn and if you growing in that medium, then we can also disregard nute deficiency. I do not have this soil in my country but i guess it should contain everything a plant needs for at least the first 4-5 weeks.

My guess then is PH imbalance or root issues.

I would test the PH and watch out for any foul smell with the water run off from the pot - If both are fine look at the light.
You said 44 inches? That's a bit too high in my opinion, try with distance from canopy at 1.5 - 2 feet.

Also check the temperature, should be at around 28 C maximum during the day and around 21 C at night (lights off). Fans can help solve that problem and cannabis loves aeration as well.

Did you see any insects/bugs in the room or on the plants? This could also cause yellowing.

And last, are you allowing the top of your medium to dry a bit before watering again? Roots need oxygen and this cannot happen if you water while the top of the medium is still moist.

Whatever you do, do not bring around major changes until you sure what is going on - I would test for PH first and take it from there. Chances are that there is an imbalance and that your nutrients are locked out.

I did everything. You mentioned. No smells. Ph of soil is 7. Let soil dry about a knuckle down before watering. I’m at a loss. Like I said my others are blowing up. These are stalled out. Idk why. It’s odd. I want to save them for sure though.

I have advanced nutrients micro grow bloom trio ph perfect. Thought about trying 1/4 strength?

They broke ground on 8/4. Choc kush broke last week. Both look same size ugh still on first set of serrated leaves

Sounds like it's on a hotspot? If it were mine I'd flush before it got any worse or died.

Also your light is kind of far away, may cause stretch, and although I don't let seedlings ever dry out I don't overwater them either

For about a week I add 5 -10 mL of 6.5 pH water right at the base of the seedling every 8 to 12 hours, and then I water them as normal plants after 5-7 days

If you do flush, flush it heavy then put it in the back for a week and don't touch it! This is a last resort effort, it's saved a plant or two for me when mine did exactly as you described for unknown reasons, it's usually hotspot and given the ffof I wouldn't be surprised

Have you had problems with ffof personally or did you read that on here? My others aren’t stretching and are doing fine where the light is. When it was 25-30” away it caused some stress to bubble gum moved it away and the growth
Exploded. Do you have/use cmh?

Aviatorshades said:

I did everything. You mentioned. No smells. Ph of soil is 7. Let soil dry about a knuckle down before watering. I’m at a loss. Like I said my others are blowing up. These are stalled out. Idk why. It’s odd. I want to save them for sure though.

I have advanced nutrients micro grow bloom trio ph perfect. Thought about trying 1/4 strength?

They broke ground on 8/4. Choc kush broke last week. Both look same size ugh still on first set of serrated leaves

Click to expand...

Yep, as beachwalker mentioned i'd go for nice flush and test ph again in 4-5 days - 7 is a bit high for soil to be honest, i always keep mine at around 6.5 and i'd rather it goes lower than 6.5 than higher.

If it's still high after the flush, i would have added a tablespoon of baking soda in 2 litres of water and then water the plant twice with it, and test again. I did that for my outdoor plant and it brought it back to 6.4, which is closer to where i like it to be.

Best of luck and i hope you save the lady!

How do I maintain a ph of 6.5? My water is 7. Do I need to buy ph down or will the ph perfect advanced nutrients trio do that for me? I only have one of those dual prong meters to read soil moisture, ph and wetness. Doesn’t even use a battery. Pretty cool. I also have test strips. 200 of em

Aviatorshades said:

How do I maintain a ph of 6.5? My water is 7. Do I need to buy ph down or will the ph perfect advanced nutrients trio do that for me? I only have one of those dual prong meters to read soil moisture, ph and wetness. Doesn’t even use a battery. Pretty cool. I also have test strips. 200 of em

Click to expand...

Sorry have to edit above post, i meant a teaspoon of a aluminium sulphate (normally available at local garden supply store) to lower the ph, baking soda increases it.

Test strips are good to test the run off or whatever water you are putting in. I was also using the probe before but it turned out to be rather inaccurate and only realized after i went wrong a few times taking action according to the ph i was seeing. Tossed it and invested a bit more into a digital probe (with batteries) which is much more reliable.

With regards to 6.5 ph guess i am just lucky with what is around me. My tap water after resting for 48 hours sits at 6.7. With a bit of nutes in there it goes down to about 6.4/6.5 and this is the Ph that goes in my soil mix (1/4 potting soil, 1/4 potting mix (with choir, moss etc), 1/4 worm castings, 1/8 perlite, 1/8 vermiculite). Maybe it is because peat moss and choir have an acidic ph of about 4.4 and 6 respectively. Not sure, but it seems to play around those values and i test the soil once a week and adjust as needed.

Aviatorshades said:

Have you had problems with ffof personally or did you read that on here? My others aren’t stretching and are doing fine where the light is. When it was 25-30” away it caused some stress to bubble gum moved it away and the growth
Exploded. Do you have/use cmh?

Click to expand...

I've had two seedlings in the last three years that have had a problem with ffof

one pulled through because I flushed it heavy, but the first one I just left and it died because it was my first run in Fox Farm ocean forest and I did not know it was known for hotspots

so of all that I've started its not bad, I use it all the time, using it right now

* buy PH down or use vinegar, best to get ph up and down and a pH and PPM meter if your going to get at all serious, that's the best thing you can do to help your grow in a big way, good luck!

*20% perlite is better

It's not a deficiency being in 50/50 Happy Frog and Ocean Forest. Not nitrogen def anyhow. Idk if PH is your problem or not, I've heard that soil's PH can be as high as 7.2, but if it's at 7 then that is definitely close to being outside of the zone. I just don't see the PH being 7 blocking nutrient uptake to the point of the seedling yellowing, but I could be totally wrong. I'm betting it's too much nutrients, Ocean Forest is some hot shit, very high in nutes. It could simply be that the seedling yellowing has weaker genetics out of the bunch...every plant can exhibit different phenotypes and traits.