REP Edges of leaves red Zn toxicity? REP

Straight up G

Straight up G

New Member
The edges of leaves are red I am 2-3 weeks left to flower, there are few rust spots from very slight burn but only little, I wanna catch this early as it is actually effecting the buds and has formed overnight?

PLEASE HELP
 
ur EC is ur electric conductivity, PPM is parts per million, i think ur PPM is werking with C02. Ur EC level is the amount of nutreints per gallon, I THINK, tho. not sure.
 
Nutrient Disorder Problem Solver
​
To use the Problem-Solver, simply start at #1 below. When you think you've found the problem, read the Nutrients section to learn more about it. Diagnose carefully before making major changes.

1) If the problem affects only the bottom or middle of the plant go to #2. b) If it affects only the top of the plant or the growing tips, skip to #10. If the problem seems to affect the entire plant equally, skip to #6.

2) Leaves are a uniform yellow or light green; leaves die & drop; growth is slow. Leaf margins are not curled-up noticeably. >> Nitrogen(N) deficiency. b) If not, go to #3.

3) Margins of the leaves are turned up, and the tips may be twisted. Leaves are yellowing (and may turn brown), but the veins remain somewhat green. >> Magnesium (Mg) deficiency. b) If not, go to #4.

4) Leaves are browning or yellowing. Yellow, brown, or necrotic (dead) patches, especially around the edges of the leaf, which may be curled. Plant may be too tall. >> Potassium (K) deficiency. b) If not, keep reading.

5) Leaves are dark green or red/purple. Stems and petioles may have purple & red on them. Leaves may turn yellow or curl under. Leaf may drop easily. Growth may be slow and leaves may be small. >> Phosphorus(P) deficiency. b) If not, go to #6.

6) Tips of leaves are yellow, brown, or dead. Plant otherwise looks healthy & green. Stems may be soft >> Over-fertilization (especially N), over-watering, damaged roots, or insufficient soil aeration (use more sand or perlite. Occasionally due to not enough N, P, or K. b) If not, go to #7.

7) Leaves are curled under like a ram's horn, and are dark green, gray, brown, or gold. >> Over-fertilization (too much N). b) If not, go to #8…

8) The plant is wilted, even though the soil is moist. >> Over-fertilization, soggy soil, damaged roots, disease; copper deficiency (very unlikely). b) If not, go to #9.

9) Plants won't flower, even though they get 12 hours of darkness for over 2 weeks. >> The night period is not completely dark. Too much nitrogen. Too much pruning or cloning. b) If not, go to #10...

10) Leaves are yellow or white, but the veins are mostly green. >> Iron (Fe) deficiency. b) If not, go to #11.

11) Leaves are light green or yellow beginning at the base, while the leaf margins remain green. Necrotic spots may be between veins. Leaves are not twisted. >> Manganese (Mn) deficiency. b) If not, #12.

12) Leaves are twisted. Otherwise, pretty much like #11. >> Zinc (Zn) deficiency. b) If not, #13.

13) Leaves twist, then turn brown or die. >> The lights are too close to the plant. Rarely, a Calcium (Ca) or Boron (B) deficiency. b) If not… You may just have a weak plant.


 
^thats right and this kind of toxicity forms with low RH, I am in soil and use PPM just as a measure like 200 400 etc, I will do that thanks fuzzy
 
thankyou clown, as directed I skipped to no. 10 but these are all deficiencies I have a toxicity, I think the only answer is to flush, raise RH and lower my PPM of nutes
 
well if its humidity ur looking for i put about 4 20 ounze cups of water and like a lil bucket with a wet rag hanging above it dripping, that usually raises it a decent amount.
 
Sorry fur the delay. Yes EC is electical conductivity in a nute solution and is the reference for all other ppm measurements. All meters are really an EC measurement which is further factored by a value of ~ .5 or .7 (called a conversion factor) to arrive at a ppm volume value. I picked EC over PPM cuz I don't know what type of ppm meter u have. So when I say 1.8 EC it means 900 ppm if you have a 50% meter. Take 1800*.5 factor = 900 ppm (usually american made ones like Hanna are .5). All references to nute concentrations should be in EC to avoid confusion. I picked 1.8 EC (900 ppm) because that is a light enough dose to get rid of a toxicity with a flush and enough to provide enough food for ur buds. They are very hungry right now. I was estimating you were running 1300 or so now?
P.S. Unless humidity is ultra-low <15% than it shouldn't matter. Too high humidity now is dangerous for the buds: Mildew!
 
RH was @ 10% got it to 30% now, I think I will stick to PPM too much to understand and it will be 400 PPM as 600 burned a little, seems to be a very serious condition anyone have any experience with it?

Thanks OG
 
You must log in or register to reply here.

Similar threads

endorflight
Calcium deficiency in high pressure aeroponics
2 3
Replies
42
Views
4K
cage
C
H
Craziest leaves and growth on plant
Replies
8
Views
949
hokiemusky
H
BibbyMcBuds
Edges of fan leaves turning red & clawing upwards, what's the cause?
Replies
5
Views
777
Bspectral
Bspectral
C
A few deficiencies. Different plants.
Replies
14
Views
2K
bluegill
B
G
Got approx 12hrs to figure out whats going on b4 I go on holiday
Replies
9
Views
925
leatherbackturtle420
leatherbackturtle420
Back
Top