yellowing leaves auto og-kush

[Aleks2309]

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[TD]hi to everyone,
this is my first grow and first topic here and thanks to the admin for accepting me.
My problem: i have searched through the lot of forums for related issue and i received different answers but i didnt resolve anything
The leaves on this plant started to yellow at the end second week of vegetation before i transplanted it.

Here's information about the plants:
og kush auto (dinafem) :

auto og kush.
19 days old plant
plant height 7"

box: 23" x 19"- x 62"

light: dual spectrum cfl 300w
distance from light 5"

induct fan 183 cubic cm per hour
passive intake airflow 11" x 11"

soil & temp: see photos

watering, not feeding, twice a week, when cup is light or soil well dried

on the second plant cheese by dinafem

this plant seems growing better but is only 5" tall (day 19)????

Plants are in the same box.

----------
Strain: cheese by dinafem & og auto kush by dinafem

Age from Sprout: 19 day

Soil : janeco light mix by ATAMI: NPK:12/14/24, ph 6

watering Twice a week: when i see that soil is about 2" dried

PH of water: 6ph: i have ghe test kit, a drops sistem

conductivity: 45ms/m

nutrient : alga grow by plagron

Indoor
Light system: 300W cfl dual-spectrum, plants 5" from light

Temps; Day: 25celsius Night:21Celsius

Humidity; 70%

nutrient: alga grow by plagron: Ec i dont know, is 100% bio

Ventilation system; Yes

Humidifier: Yes
Co2: No:

Any advice?

i know that this question has been asked many times but maybe you can help me
I thank you in advance for every answer and sorry if I made a mistake asking this[/TD]
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[Canuck147]

To start with, autos don't like being transplanted - so they are suffering a bit of shock from transplanting. After germination autos should be put in their final pot you plan to use.

 

[NebulaHaze]

I agree. Also, in the picture it has the temperature at 28°C. That's pretty hot, especially for a young plant. I do think the 70% humidity level is a problem that may be affecting this, because plants aren't able to drink properly if it's very humid. At this age I think plants really like it around 50% RH. Is there a source of fresh air? Fresh air has CO2, which is like oxygen for your plant leaves when they're doing photosynthesis. Also, do you have a fan blowing over the top of your plants, and how are you venting out hot air from the grow light?

Overall they actually look pretty good

 

[Aleks2309]

temp inside the box is 26,2
but thinks go better after i dropped down the humidity you counseled me
about transplating auto in final pot i have to buy more soil
thanks guys


I'm just interested in why the cheese is so short, only 5 "after 22 days: is that ok???

 

[NebulaHaze]

They're doing good but they need more light if you want them to grow faster. How many "true" watts of CFLs do you have? (not "equivalent" watts) You generally want at least 150W per plant with CFLs. That first plant is looking especially beautiful!

 

[Aleks2309]

Sorry for late reply.
I have 300w cfl dual spectrum.
Distance from plant now is 4 ", Is it enough for 1 plant?
This is my first grow.

Thanks

 

[NebulaHaze]

Is it 300 "true" watts, or is 300 listed at the "equivalent" watts? If it's true watts, it's enough, if it's equivalent watts, then you want to get more

 

[Aleks2309]

The manufacturer says the 300w is real, but who knows :big-smile: Thanks