New Grower Got some deficiency going on.. :(

[Polo]

Hows it going guys!!

a deficiency popped up on one of my plants.

Think Different Day 50
Biobizz Light Mix ph 6.2
AN Iguana Juice Bloom
AN B-52
11L Pots
600 HPS
Temps: 85-90F when lights are on. I can't do anything about the temperature this grow.
RH: 30-45%
18/6 Light Schedule

I've been feeding every other day about 3L of water + Nutes. (3ml per L of Iguana Juice Bloom + 2ml per L of B52.

Ph of water going in 6.5

I used ph down during the veg stage since my feed was showing ph of 7 when mixed. The guys at the hydro store told me to absolutely never use ph down or up ever again since I am growing "organic". The ph of my flowering mix is a solid 6.5 with out any ph up or down.

Any help would be appreciated! The only leaves showing symptoms are the top 5 leaves rest look fine.

 

[Muddy]

Have you been checking the pH of your run off? If so, what has it been reading? While it could be a deficiency it could also be nutrient lockout if your run off pH is too high or low.

 

[Polo]

Just did a feed; the feed went in at 6.5 and came out at 6.5.

 

[Trapper]

Hey....I think it's going to be easy to calculate your soil Ph

 

[Polo]

Haha i think so too.. so i guess that leaves me with a deficiency. The local hydro store doesn't have any cal or mag in stock; they usually cary canna mono cal and mag. They seem to think it will be in late next week. Any suggestions? I am only feeding 3ml/L if Iguana juice; should i boost it to 4ml/L next feed? my other two smaller tds seem to be fine at 3ml/L with no signs of anything. The one with the deficiency is almost double the size in width.

 

[Trapper]

Maybe some Molasses???

 

[NEimmaculates]

Epson salt for magnesium not sure what to use for calcium

 

[Muddy]

Just did a feed; the feed went in at 6.5 and came out at 6.5.

Great, that eliminates any pH related issues. Magnesium and/or calcium/magnesium deficiencies can be common in plants that age. You're looks like magnesium. Your local grocery store or pharmacy should carry epsom salts. Add 1 tablespoon per gallon of feed. For quicker results, add 1/2 teaspoon to a quart of pHed water and foliar feed once a day for 3 days. I won't hurt to add some molasses either just in case you're getting low of calcium as well. Add it to the feeds, not the foliar spray.

 

[Polo]

Thanks a bunch guys!!