Holes in my leaves! Need HELP asap, with PICS

[bernzoo]

hello and thanks for reading

I am at the 4th day of flowering. I checked on my ladies 2 days ago and i didn't see anything then.

today i checked on them again and nearly freaked out.

on some (like 4 out of 12) plants i found some wierd shit (only about 5% of the leaves are affected, and only the smaller ones really).

the ones affected are all close to the fan but it ain't really blowing at them directly.


my set up:

600 watt / coco in 11 litre pots / metrop nutrients

plants are a little over 60cm already (like 2 feet)

ph value of the nutrient solution: 5.8
EC value of the nutrient solution: 0.7

I can't be nute burn with such a low EC value imo.

i checked the leaves and plants affected well with my magnifying glasses and i didnt see anything at all that could make me think it is a bug.

no signs of insects anywhere but if it ain't bugs then wtf is this ??

here are some pics, i took one of the entire plant too so you see they are healthy and not overfed really..

thanks so much for your input and excuse my akward english!

 

[Ziggaro]

is that happening at the top of the plant?
how close is the light?
is the light air cooled?

pH is on the low side too

 

[bernzoo]

@zig

thx for the reply bud

600 watt is air cooled (in a cooltube).

it is around 45cm from the top of the plants.

temp is around 26 degrees celcius, at night around 23 with lights off.

and ya, it is only happening to the smaller leaves at the top of the plants

 

[HeadyPete]

It is from your leaves developing without proper nutrients available because they were locked up from incorrect ph.

They won't heal, but the plant will be fine as long as your ph gets corrected and stays corrected.

5.8 - 6.8 is the ideal range. Aim for 6.3.

 

[bernzoo]

It is from your leaves developing without proper nutrients available because they were locked up from incorrect ph.

They won't heal, but the plant will be fine as long as your ph gets corrected and stays corrected.

5.8 - 6.8 is the ideal range. Aim for 6.3.

hi heady

k, i usually "lock" my PH around 5.8 and never had this problem occur before.

i will raise it to 6,3 and see where it goes.

but anyone think it is a bug caused problem or shouldn't i worry about it?

gracias

 

[HeadyPete]

For sure your plants look real good, but somewhere the ph went out and those leaves were deformed. Any deformed or twisty or asymmetrical leaf growth is from out of range ph. Getting the ph up a little gives you a little more leeway for fluctuations.

It's not a bug. Only caterpillars eat that much material and their damage is circular almost always, plus there would be more and more damage.

Like I said, there wasn't nutrients available to build the leaf properly when it was forming, hence the twisted deformities, leaf material pulling away from the veins and causing your holes, and the discoloration.

 

[wygram]

I think I have to disagree with you Pete, I personally never water with anything over 6.0 in coco and have had great results on my first coco run. Taken from gaiusmarius, moderator coco forum:

here is my fert plan. starting the day the new clones are planted in a rw cube.

rooting in rw phase, 7 to 10 days: rhizotonic full dose, a+b 1 to 1.25 ml per litter ec around 0.8 to 1.2 ph 5.7

veg phase in the coco slabs: A+B at ec 1.2 to 1.5 ph 5.7 and up to 2ml per litter, rhizo full dose for first 3 days of veg, then down to half a ml per lt till week 5 of 12/12 when you stop it.

first 2 weeks of 12/12: up your nutes as much as the plants will take it, but not over 2.0 ec. ph 5.9

after 2 weeks of 12/12 add a booster, either pk 13/14 or bioboost, or even another brand of flowering stimulator. at this point start adding the cannazym or other zym product, specially if you plan to reuse the medium.

from this point on you want to give your plants just as much as they can use, so you watch carefully that the fan leaves don't get too dark green and try and avoid burning the tips. ph 6.0 to 6.1

 

[bernzoo]

Taken from gaiusmarius, moderator coco forum:

here is my fert plan. starting the day the new clones are planted in a rw cube.

rooting in rw phase, 7 to 10 days: rhizotonic full dose, a+b 1 to 1.25 ml per litter ec around 0.8 to 1.2 ph 5.7

veg phase in the coco slabs: A+B at ec 1.2 to 1.5 ph 5.7 and up to 2ml per litter, rhizo full dose for first 3 days of veg, then down to half a ml per lt till week 5 of 12/12 when you stop it.

first 2 weeks of 12/12: up your nutes as much as the plants will take it, but not over 2.0 ec. ph 5.9

after 2 weeks of 12/12 add a booster, either pk 13/14 or bioboost, or even another brand of flowering stimulator. at this point start adding the cannazym or other zym product, specially if you plan to reuse the medium.

from this point on you want to give your plants just as much as they can use, so you watch carefully that the fan leaves don't get too dark green and try and avoid burning the tips. ph 6.0 to 6.1

heady was right heh, the plants affected seem to be doing better! maybe it was strain related and the one i currently grow needs a PH thats slightly higher.

i pretty much kept my PH-in the range (5.6 - 6.2) the way you describe it wygram but i guess all strains are different and it can't really be generalized.

i don't agree on the EC strenght you suggest, i never, i mean never go above EC 1.7.

for example, giving a nute solution with EC 1.2 to plants in the rw rooting phase will most likely lead to nute burn and other issues because the plants doesn't need that much nutrients anyway.

last grow i never went above EC 1.5. the results were awesome and the taste too.

plus you save up money because you don't waste nutrients as if you gave the dosis the manufacturer suggests.

peace

 

[wygram]

Totally agree! I live by Mandala Mike's feeding thread.

That was meant as a pH reference, but as you say each strain has its unique likings. Karma headed Pete's way.

 

[HeadyPete]

There is a lot of general disagreement on ph, but after everything I have seen, including a Heads mag article on hydro recommending 6.3, and realizing that there is a range - 5.8 - 6.8, I have settled on 6.3 and my plants are telling me that is good. 5.8 can work, but it is the bottom of the range and any lower and you got problems. I had lockout when my meter went .9 out of calibration and my ph dipped lower that 5.8. After calibrating and adjusting my plants recovered soon after.

bernzoo, 5.6 is too low. Try to keep the ph as stable as possible. Plants get stressed from ph swings of even a few points and keep in mind that ph is logarithmic, meaning that ph 5 is 10 times as acidic as ph 6, and ph 4 is one hundred times as acidic as ph 6.

wygram, if you've never had ph above 6, than how do you know 6.3 is not acceptable? Also, you must adjust watering ph to whatever it needs to be to offset and balance soil ph. If your soil is 6.2, then your 6 water would keep it at 6.1 nicely. If your coco went up to 7, you'd need to drop your water ph to 5.2ish to bring the soil ph back down to acceptable range. It's the runoff that tells you what to adjust your watering ph next time.

I grow in coco, so we are comparing apples to apples here. Coco has a natural ph very close to ideal, keep in mind when comparing to someone growing in a peat based mix. We need less adjustment and buffers to keep our ph ideal. This is why coco is the superior growing media. I don't need any lime in my mix to counter the acidity of peat (3-4 ph).

 

[HeadyPete]

Just saw that gaius uses rockwool cubes that are alkaline and that would bring that 5.9 water up, for sure. He states watering ph, not runoff ph.

You must always factor in the media ph when adjusting your water. Runoff measurement gives you this info.