Help: Leaves Curling Up & Brown Spots

[BeanTownFan420]

When auto show preflowers they are starting to bud not like photos they preflower but do not bud till light is right auto bloom as soon as they can.

 

[BeanTownFan420]

I only feed tiger bloom and big bloom during flower and my results speak for themselves.

Day 35

• BeanTownFan420
• May 29, 2019

Hong kong kush

• BeanTownFan420
• Jun 22, 2019

Hong kong

• BeanTownFan420
• Jun 22, 2019

Hong kong kush untrimmed.

• BeanTownFan420
• Jun 22, 2019

 

[Numb73]

I have already flush it with ph at 6.5,
Today I fed them with 0,5ml of bio grown, 1ml of top max and 3ml of bio bloom that contain potassium ecc so want to see these days how things go

 

[Numb73]

Thanks everyone for the help, I still thinking that are heat stress! But I will buy bud candy and rhino skin and test it!

 

[new to mushroom compost]

looks like potassium deficiency. flowering cannabis goes through potassium more than any other stage.

Check soil PH

 

[new to mushroom compost]

Hey guys, i’m New here, i’m Growing 3 critical autos and one of them have a leaf problem that I can’t find what it is, i’m In week 3 of flower and the plant top leafs start curling up and the edges becomes brown with some brown spots, I don’t know what to do.. please help me
Temps a 24/28 celsius
Humidity: 55/60%
Nutes: biobizz
Strain: critical +2.0

If you check the soil water coming out of the bottom you ph might be high. You can also take vitamin C put in hot water blend it add to watering plant will take the stress out of the plant, guy called the farmer the company hired to water our plants mess ours up his water testing equipment messed up, so I mixed Vitamin C in and plants went Back to color and finished budding. PH in water coming out was high