New grower I need help. Vegetation stage.

Bellmang · Aug 23, 2025

Hello everyone I started growing myself just under 2 months ago. And all except one of these plants just won’t grow any bigger? They are just stunted. And I can’t seem get rid of the yellow tops. Any help would be greatly appreciated. Because my main plant has been growing fantastic thanks

What I’m working with.
.2000w light
.1 ounce grow bags.
.I’m feed them thc a&b food.
.2 fans going.
.Humidity is 48
.Temp is 22 degrees Celsius.

LoveGrowingIt · Aug 23, 2025

@Bellmang - Welcome to the farm!

Bellmang said:
I can’t seem get rid of the yellow tops.

That's usually from the soil being too wet or watering too frequently. Let it dry and the tops should turn green.

LoveGrowingIt · Aug 23, 2025

Bellmang said:
.Humidity is 48

For young plants, I run the humidity higher--in the high 50s.

Bellmang said:
.Temp is 22 degrees Celsius.

22C (72F) is a little cold for lights-on temperature. I recommend 24 (75) to 26 (79).

Bellmang · Aug 23, 2025

Thanks so much everyone. These are the details I just don’t know. Can I ask how you guys keep the temp at the same the whole time? mine is so up and down. All the help is appreciated

Bellmang · Aug 23, 2025

Also what could the yellow be from?

Oldchucky · Aug 23, 2025

Bellmang said:
Also what could the yellow be from?

I don’t see any yellow! All new growth comes out a lighter green and then darkens overtime! I think they look healthy! Good luck!

LoveGrowingIt · Aug 23, 2025

Bellmang said:
Also what could the yellow be from?

That's usually from the soil being too wet or watering too frequently. Let it dry and the tops should turn green. As @Oldchucky says, some yellowing at the tips is a normal part of growing. What I see in the first three pictures looks like overwatering. The yellowing in the last two pictures looks like normal growth.

The yellowing from overwatering is due to loss of oxygen availability in the root zone because the soil is too wet and thus environmental gas exchange is limited.

Bellmang said:
Can I ask how you guys keep the temp at the same the whole time? mine is so up and down.

Many tent growers use environment controllers. I have some of these:

CONTROLLER 69 PRO, Smart Climate Controller UIS 4-Port, with Temp Humidity VPD Sensor

Take command of your environment utilizing the Controller 69 Pro.This smart 4-port UIS hub automates climate devices via accurate VPD and heat readings.

acinfinity.com

Temperature shifts aren't necessarily something to be avoided. They're normal in nature. The plants expect cooler temperatures during their dark cycle.

New grower I need help. Vegetation stage.

New grower I need help. Vegetation stage.

Bellmang

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