First time grower seedling yellowing

C

Cameronchapman

Member
I am growing a photoperiod. The seed sprouted 5 days ago. My soil is miracle grow that I sifted fine (I know it's not ideal but it's what I had). Humidity has stayed at 60% because I was told by the grower to keep humidity lower because this strain is susceptible to mold. Temperature is 80. The ph of the soil is 6.9 (maybe a little high?). The container is a red solo cup that has about 50 holes in the bottom and all the way up the sides. Im letting the soil get mostly dry between watering and right now the top is dry but 1/4 inch down is moist. The first 3 days the seedling was stretching really tall and I had it in miracle grow that wasn't sifted and I was top watering. The light was 300 ppfd according to a phone app and the ppfd map included with the light. I tried 3 phone apps that all agreed exactly. The light is on 16 8 4am to 8pm. I transplanted the stretching seedling to plant it deeper and change the soil to a fine sifted one. I also increased the light to 500ppfd and started bottom watering. I know that's a lot of changes at once and was a bad idea, but I was high.1000000855.jpg
This photo was last night at 6pm
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This photo is this morning at 8am
 
K

KeyFinger

Member
It does look like a bit of nitrogen deficiency, not to mention that those leaves don't really look like ganja plant...I wont be risking giving any advise at that point
 
Blue_Focus

Blue_Focus

Well-Known Member
I run my lights at 250 PPFD until my plants get 5 nodes before turning the light up.

Also running a lower humidity is usually when it's budding.
 
FatherNelson

FatherNelson

Well-Known Member
You want some stretch at this stage. Put a weak fan or some type of airflow around it is a little more important.

What you dont want is a noodle thats about 8 inches tall. The leafs will be heavier than stem can support and will break.

In veg, I aim for about 280 at leaf height so I dont have to adjust lights until flower.
 
C

Cameronchapman

Member
FatherNelson said:
You want some stretch at this stage. Put a weak fan or some type of airflow around it is a little more important.

What you dont want is a noodle thats about 8 inches tall. The leafs will be heavier than stem can support and will break.

In veg, I aim for about 280 at leaf height so I dont have to adjust lights until flower.
Click to expand...
I have an air purifier that circulates in the closet but no direct airflow on the plant. Should I add a fan?
 
FatherNelson

FatherNelson

Well-Known Member
If the plant is wiggling, youre fine. If its not moving it needs something closer.

You want a consistent, not overwhelming wiggle. If the plant looks like its in a tornado its too much
 
Blue_Focus

Blue_Focus

Well-Known Member
FatherNelson said:
You want some stretch at this stage. Put a weak fan or some type of airflow around it is a little more important.

What you dont want is a noodle thats about 8 inches tall. The leafs will be heavier than stem can support and will break.

In veg, I aim for about 280 at leaf height so I dont have to adjust lights until flower.
Click to expand...
I do something like this. I have my light at the top of my tent and set the PPFD at the soil for 250.

As my plants get taller the PPFD increases. :D
 
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