Mephisto Genetics Hubbabubbasmelloscope

[Frogster]

Worth a try first...

Humidity & Temp are closely linked... as one goes up the other goes down, and vice-versa.

You can micro climate with humidity domes / bottles, the climate will be different to the main grow area, it can be more humid, but watch for yellowing leaves from lack of airflow.

Like everything, it is a balancing act.

If it helps, here is a 11 day old plant from my last grow for comparison... Also you can see my fogger in the background....

 

[GMAW]

Airflow will be a problem with the plastic bottles. I only check my plants every 3 days or so. I won't be able to remove the bottles for 3 days at a time. I am not sure how that will work. Temperature is not an issue. Only humidity.

 

[GMAW]

Worth a try first...

Humidity & Temp are closely linked... as one goes up the other goes down, and vice-versa.

You can micro climate with humidity domes / bottles, the climate will be different to the main grow area, it can be more humid, but watch for yellowing leaves from lack of airflow.

Like everything, it is a balancing act.

If it helps, here is a 11 day old plant from my last grow for comparison... Also you can see my fogger in the background....

Your 11 day plant is 30x the size of my 10 day. Very upsetting for me. But nice work on your part.

 

[mephisto]

Your 11 day plant is 30x the size of my 10 day. Very upsetting for me. But nice work on your part.

I saw you mention new bulbs and a different spectrum - we often grow hps start to finish with no issue and good growth

What's the soil mix you're using?

If temperatures are on point, next things I would attribute to slow growth would be under/overwater, too heavy soil, too rich soil,

But looking at your photo, the colour looks okay, and the leaf size of the first set looks okay, so perhaps they're just slightly delayed in development for the days

 

[GMAW]

I saw you mention new bulbs and a different spectrum - we often grow hps start to finish with no issue and good growth

What's the soil mix you're using?

If temperatures are on point, next things I would attribute to slow growth would be under/overwater, too heavy soil, too rich soil,

But looking at your photo, the colour looks okay, and the leaf size of the first set looks okay, so perhaps they're just slightly delayed in development for the days

Temperature is almost perfect day and night. Soil is Eko Jord from granngården. I mixed in some neem powder to help with insects. The light is on 600 watt and about 45 cm from the plants. I am not sure. Perhaps the soil is too thick. I just now mixed in the perlite. It gas to be low humidity problem. Everything else seems perfect. I think they will take off soon. Thanks for the help Mitch.

 

[Yeatster]

If you suspect humidity, a pan of water with a towel wick worked for me. This method gave me 50%ish, from 28%ish.

 

[Cptn Feathersword]

I bet roots moved through the perlite and stopped at the soil because its a bit hot. No root growth = no plant growth.
Repot them into the most expensive seedling soil mix that your local shop carries and I bet they take off.
Being autos though I would say yield is pretty much going to suck now so it's better to start again with new seeds in the seedling soil.

I know the headspace you are in now trying to solve the problem, it makes you over analyze everything like humidity etc but those plants dont have a minor problem like humidity they have a big one like the medium is bad. A plant with big roots is still going to grow even in low humidity.

It's like if your car won't go and you are looking under the hood when the problem is it has no wheels lol.

 

[GMAW]

If you suspect humidity, a pan of water with a towel wick worked for me. This method gave me 50%ish, from 28%ish.

I will have to give that a try. That might be all I need. Thanks for the idea Yeatster!

 

[GMAW]

I bet roots moved through the perlite and stopped at the soil because its a bit hot. No root growth = no plant growth.
Repot them into the most expensive seedling soil mix that your local shop carries and I bet they take off.
Being autos though I would say yield is pretty much going to suck now so it's better to start again with new seeds in the seedling soil.

I know the headspace you are in now trying to solve the problem, it makes you over analyze everything like humidity etc but those plants dont have a minor problem like humidity they have a big one like the medium is bad. A plant with big roots is still going to grow even in low humidity.

It's like if your car won't go and you are looking under the hood when the problem is it has no wheels lol.

Thanks for the info. I will let the plants go and next time around use seedling soil. These are 90 day autos so I might still be OK.

 

[SouthCarolinaYardDog]

I had 3 seeds pop up one set of leaves at day 17 the same dug them up no root don't know how they stayed alive all the rest was fine that was 3 out of 15.