Any ideas?

[glasgow grower]

plants were fine last week they are auto ak47 in compost only had i feed of bio grow 0.5ml to 2 liters of water they are 24 days old under 18/6 cycle under a 400w dual spec HPS only the 1 has these white spots like as if milk has been spilled over the plant the other2 has these browning leaves any help is much appreciated ive looked under the leaves and on top and cant see any sign of bugs thanksView attachment 135108View attachment 135109View attachment 135110View attachment 135111View attachment 135112View attachment 135113

 

[o-two]

the whole plant looks healthy now, the yellowing and dying of the lower leaves is normal at this age aslong as the other leaves are intact, on the other hand the white spots are not always mold, just wipe the leaves with 2 sponges with some PH water to make sure its not the left overs from the time you last watered it, sometimes when you water and it evaporates on top of a leave it leaves a mark, but its nothing to be worried about just wipe it out to make sure it no mold

otwo

 

[glasgow grower]

much appreciated thank you

 

[Muddy]

Sorry, but the yellowing of those leaves is not normal at this point in the grow. It indicates a possible P deficiency, most likely being caused by nutrient lockout from the pH being off. If it is not corrected the yellowing will progress to brown and turn crispy, and will spread higher on the plant.

the whole plant looks healthy now, the yellowing and dying of the lower leaves is normal at this age aslong as the other leaves are intact, on the other hand the white spots are not always mold, just wipe the leaves with 2 sponges with some PH water to make sure its not the left overs from the time you last watered it, sometimes when you water and it evaporates on top of a leave it leaves a mark, but its nothing to be worried about just wipe it out to make sure it no mold

otwo

 

[psykadelix]

Looks like powdery mildew. White powdery mildew. It looks like an infestation over a nute problem because it's non uniform and affecting different age parts of the plant all at once. Get yourself some neem oil 1 tsp/ quart with a little dish soap mix and spray before lights out every other day for a week. If it doesn't go away then you could have some type of lockout.