7 day old autos: 1 almost completely yellow while the rest are good

[TheNoob]

First tent grow and I’m probably just being a nervous Nelly, but why would this auto be almost completely yellow? 3x3 tent with a Maxsisun Mf2000 set at 70% and a maxsisun pb1000 set at 100%. Lights are approximately 24” from top of pots. Fabric pots with organic soil. Temp range:70-80f
Humidity range: 60-75%
The largest auto is 14 days old and the smallest one is 2-3 days old. The rest are 7 days old.
Also do these look small for 7 days old? Seems like they aren’t growing nearly as fast as my outdoor grow did.

 

[Deke]

What soil?

 

[TheNoob]

What soil?

This soil mixed with extra perlite. The bottom half of the pots I mixed in some extra bone meal and blood meal also

 

[Deke]

Not familiar with that soil. I avoid anything made by miraclegrow for cannabis. Maybe others have some experience with it.
Maybe over watering. Water a ring around the seedling out several inches. Make the seedling search out the water. That soil says it holds water.
And yes those do look small for one week IMO.

 

[TheNoob]

Not familiar with that soil. I avoid anything made by miraclegrow for cannabis. Maybe others have some experience with it.
Maybe over watering. Water a ring around the seedling out several inches. Make the seedling search out the water. That soil says it holds water.
And yes those do look small for one week IMO.

I used this soil in previous outdoor grows and it worked pretty well. Definitely not top quality, but it gets the job done. Overwatering was really my only thought, but I let the soil get pretty dry before watering, so I hadn’t convinced myself of that as the issue.

 

[TheNoob]

Bump...

 

[LearningMore]

Is the yellow seedling in the center of the tent/directly under the light? Maybe it’s getting too much light relative to the others?

 

[TheNoob]

Is the yellow seedling in the center of the tent/directly under the light? Maybe it’s getting too much light relative to the others?

No. It’s on the edge of the light. Bumped it down to 50% light on the 230 watt light (115 watts) and moved them indoors outside of the tent to maintain a consistent environment that doesn’t fluctuate. Lower temps 68-72 and humidity around 50%. Frustrating to say the least as they all seem to be going down hill Since this morning.

 

[LearningMore]

What is your water pH?

 

[TheNoob]

What is your water pH?

Just using regular tap water at the moment. I do not PH test it. Worked for previous grows and I have read in multiple areas that organic soil grows do not require properly PH’ed water like hydroponic or inert medium grows.