Is this Mag & Cal or ? deficiency?

[polishpollack]

Not all brown leaves are "burned by chemistry." The leaves in the photos have magnesium deficiency. Advanced stage of leaf tissue death will always look brown and crispy, but determining the cause is the issue.

[polishpollack]

Happyretiree, let us know how things worked out.

[Happy Retiree]

Happyretiree, let us know how things worked out.

Sorry, but I've been away & that's why you haven't back from me. I filled out the form & included a spreadsheet of my feeding formula, but it won't format correctly in this post.

What is your experience level? (first timer, novice, experienced...) EXPERIENCED NOVICE â?? BEEN GROWING FOR SEVERAL YEARS

What type of hydro set-up are you running? NONE - SOIL

Your Equipment:
A) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) HPS
B) Distance from tops? 2 FEET
C) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) ENCLOSED REFLECTOR
D) What are the bulb wattages, kelvin ratings, and schedule? 1000 WATTS, 12 ON, 12 OFF
E) Is there a consistent fresh air supply? YES
F) Do you have an exhaust fan and a circulation fan? YES
G) Size of reservoir?
H) What medium if applicable. OCEAN HARVEST SOIL

Your nutrients and water:
I) If using rockwoll for clones or seedlings, did you rinse the cubes well, with properly ph'd water? WE DONâ??T RINSE, PH IS AROUND 6.5, WE HAVE NO PROBLEMS WITH CUTTINGS
J) Source of water. (tap or filtered) What's it's ph? TAP, UNFILTERED, 6.3-6.8
K) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.

FOXFARM TIGERBLOOM 2-8-4
FOXFARM BIG BLOOM 1-3-7
OPEN SESAME N 5%, Phosphate 45%, Potash 19%, Sulphur 2%, Iron .15%, Manganese .05%, Zinc .05%
BEASTIE BLOOMZ 0-50-30
CHA CHING 9-50-10

All feeding done to manufacturers' specifications.



L) What is the ec/ppm of your unadjusted tap (or filtered) water? Under 100
M) What is the ec/ppm of your nutrient solution?
N) What is the temperature of your nutrient solution? (reservoir high and low temps)
O) Does your ec/ppm show a rise or fall when you do your daily PPM check? We donâ??t check daily.
P) Does the ph fluctuate? NO
Q) Do you foliar feed? If so, with what, how often, and at what time do you
spray? (Just after lights come on, just before they go out...) WE DO NOT FOLIAR FEED.
R) How often do you replace reservoir water/nutes? What does it look like before changes? (clear, foamy, green, brown...)

Your growroom:
S) What size of closet, room or hut? ROOM IS 12FT X 15FT. WE HAVE 3 1000 WATT LIGHTS WITH REFLECTOR screens TO CREATE 4 WALLS THAT CONTAIN THE GARDEN WITH THE SPACE OF THE LIGHTS.
T) What are the temps and humidity levels while lights are on? MID 70 DEGREES 35-45% HUMIDITY ...With lights off? LOW 70â??S â?? I DONâ??T KNOW THE HUMIDITY WITH LIGHTS OFF.
U) Have you seen signs of insects in the growroom? NONE
V) Are the roots long and white, or brown and slimy? LONG & WHITE

Your strain:
W) What strain are you growing? (Indica dominate or Sativa dom?) JACK FLASH SATIVA DOMINATE
X) From seeds or clones? ORIGINALLY FROM SEED, NOW FROM CLONES
Y) Is this an autoflower strain? I DONâ??T KNOW

[Happy Retiree]

Attachment 290330Attachment 290331Attachment 290332Attachment 290333Attachment 290334

Here are some more photos. I know the color isn't great even though I took the pics in good light with a flash. The coloring is the same as in my original pictures.

[Happy Retiree]

Good color on this. Week 3 of Flowering Jack Flash.Attachment 290335

[Happy Retiree]

Different plant, same problem.
Attachment 290336

[Shovelhandle]

I wish I knew, Retiree.
As I posted, I've had a similar problem and I have a similar grow to yours, good products, proper feeding, lighting temp and pH. One strain hated it and the other strains loved it. I know that a lockout from too much something can look like not enough something. We'll both be happy when we solve this dilemma.

[Happy Retiree]

I wish I knew, Retiree.
As I posted, I've had a similar problem and I have a similar grow to yours, good products, proper feeding, lighting temp and pH. One strain hated it and the other strains loved it. I know that a lockout from too much something can look like not enough something. We'll both be happy when we solve this dilemma.

Evidently, the FoxFarm nute schedule is too strong. This type of "burn" happens in every one of my Jack Flash crops. Unusually, it occurs much later in the Flowering cycle as opposed to this time when it started in the 2nd week. The "schedule" was not created for cannabis plants & being that not all plants are created equal, it's entirely possible it's overkill - no pun intended.

I'm going to straight water the next 2 times, then go 1/2 strength on FoxFarm. If anyone has a better way of handling this, I'm all ears.

[polishpollack]

Crap, I think I was wrong. I took the spotting to be mag deficiency because that's usually how it appears, but this is why you want to take photos in white light, not sodium. I thought the spotting was a golden color but that was made by the sodium light. It actually appears to be a brown color. I didn't realize last time that you're giving so much phosphorus. That is your problem. Any reason why you are giving so much? that's a LOT of P. Chances are, all you really need is the Tigerbloom. Make sure that it has micronutes, like mag, calcium, sulphur, boron, etc., or you'll have to supplement. It's hard to supplement without giving more fert since most of the micro fert products contain at least some of the macro nutes. One more reason why I advocate Dynagro, because it's pretty simple, has everything you need, and you have to go out of your way to screw it up. The Foxfarm schedule doesn't take into account the adding of more ferts. Just water and let the soil dry out before you water again. Maybe it isn't too late.

[Happy Retiree]

Good to hear from you. Why so much P? Just following the FF schedule of feeding, but I am adding Open Sesame, Beastie Bloomz & Cha Ching. Tiger Bloom has 8% & Big Bloom has .3% & Grow Big has 4%. Tiger Bloom has Mag, Boron, Copper, Iron, Manganese & Zinc. All trace amounts.

I'm into week 3 of Flowering now. Unfortunately, I already watered with nutes today - 2 tsp Grow Big 6-4-4, 2 tsp Tiger Bloom 2-8-4 & 1 Tbl Big Bloom .01-.3-.7, 1/4 tsp Beastie Bloomz 50% P, 30% Potash, Boron, Copper, Iron, Manganese, Zinc. Do I need to take the plants outside & flush? Or just wait till next watering & use no nutes. I have 16 plants & don't want to lose them so I'll do whatever it takes.