1st Grow- 1st Problem... 4 weeks into Flowering

[bturner]

This is my first MJ grow. My setup is two plants under a 400 watt hps bulb. Growing in 3 gallon square pots with 50% Pro-Mix and 50% Ocean Forest. Have been feeding them Roots Organic and the PH has been at 6.5. They grew from bagseed and I vegged for maybe two weeks. They have been flowering for around 4 weeks. I know that the leaves will turn yellow because of lack of phos at the end of flowering, but I am not sure about these brown spots. Any help would be great, thanks.

 

[bturner]

Anyone know what it is????

 

[bturner]

Come on people!!! 80 views and no ideas. It is spreading to all the big fan leaves. I really need some help.

 

[otwa2002]

r u spraying them with the lights on? looks like water and hps mix burnt them. or fert spilling on the leaves during watering. but looks like def light burn.

 

[bturner]

I havent been spraying them, and the leaves closer to the light are doing fine. Most of the leaves affected are the older fan leaves at the bottom and in the middle. I dont think it is light burn. Thanks for your input though.

 

[bakeddude]

Phosphorous deficiency? Maybe bein caused by lockout? I dunno I just refer to this guide usually, I find it to be very helpful for myself.

 

[o= High= o]

Look under the leaf for spider mites or there eggs you will need a magnifying glass, If its spreading it could be bugs but this is what mine looked like with a mite infestation

 

[otwa2002]

look for webbing and little black spotts spyder mites.

 

[nellyatcha]

This is my first MJ grow. My setup is two plants under a 400 watt hps bulb. Growing in 3 gallon square pots with 50% Pro-Mix and 50% Ocean Forest. Have been feeding them Roots Organic and the PH has been at 6.5. They grew from bagseed and I vegged for maybe two weeks. They have been flowering for around 4 weeks. I know that the leaves will turn yellow because of lack of phos at the end of flowering, but I am not sure about these brown spots. Any help would be great, thanks.

lack of nitrogen or nute lock so flush it and wait and see what happens and , then give her some fresh nutes , but it supposed to happen when flowering so its no biggie

 

[BeefSupreme]

Id flush it, but some leaves will naturally start dieing off when you are about half way through flower. your other leaves look great!