Newb needs advice!

First time grower here in week 4 of Veg. 18/6.

Need some advice on why my leaves have developed this white "rash" in the last week. On top of that, just today the leaves appear to be turning yellow and many of the leaf edges are becoming brown and flaky. Please see my pics and give me some advice. Thanks!

strain is afghani kush x white widow clones
Indoor grow in Hydroton in 6" net pots
Fox Farm nutes mixed 1/2 strength
4 30-minute feedings per day.
pH is constant at 6

That's nute burn bro. Cut back on the nutrients.

Best Buds said:

First time grower here in week 4 of Veg. 18/6.

Need some advice on why my leaves have developed this white "rash" in the last week. On top of that, just today the leaves appear to be turning yellow and many of the leaf edges are becoming brown and flaky. Please see my pics and give me some advice. Thanks!

strain is afghani kush x white widow clones
Indoor grow in Hydroton in 6" net pots
Fox Farm nutes mixed 1/2 strength
4 30-minute feedings per day.
pH is constant at 6

Click to expand...

Take a look at the underside of your leaves. That could be bug damage. I don't do hydro but half strength shouldn't be burning your plants. It could be a little deficiency. You should be able to find out what's what in a day or 2. Maybe up your nutes a tad and see how they respond. Has your pH meter been calibrated recently? 6 should be about ideal for hydro although I know some people run lower.

Sure looks like nute burn to me though thankfully long time since I had to deal with it. Appears to be mostly on the older leaves and staying pretty much on the margins of the leaves. Either way, burn or deficiency, you should always resort to the number 1 rescue attempt whenever seeing a plant that is distressed and that is flush, flush flush then adress your nutes agian. Good Luck.., hope this helps.

Plant nutrients are available across a range of pH with the optimal pH being 5.5 for Hydroponics and Coco Coir and a slightly higher pH of 6.3 for soil based systems. These 2 pH values represent the values that allow the plant to take up the maximal amount of all mineral elements. Go too far above or below and certain elements begin to become unavailable to the plant.
Get this simple control wrong and your plants will suffer suboptimal nutrition at best and at worst your plants will suffer from multiple nutritional deficiencies or even die in extreme cases.