Yellow lower leaves/black spots on young plants

[jorgeblen]

hello all,

any help is very much appreciated

How long has this problem been going on? 5 days
What STRAIN are you growing? Big Buddha Blue Cheese
What was the establishing technique? (seed or clone?) Seed
What is the age of your plants? 16 days
How long have they been in the soil mixture they are in now? 1 day
How Tall are the plants? 7 cm
What PHASE (seedling, vegetative or flower) are the plants in? Vegetative
What Technique are you using? (SOG, SCROG etc) none so far
What size pots are you using? (Include how many subjects to pot) 6"
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) biobizz all mix. 1st pot 50% all-mix/50% perlite. Repoted into neat all-mix
What Nutrient's are you using? biobizz grow
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful* Used 1/4 ml per litre once 3 days ago
How often are you feeding? just once so far
If flowering, when did you switch over to using Bloom nutrients? -
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect) -
What is the TDS/EC/PPM of your nutrients used? -
What is the pH of the "RUN-OFF"? dont have a pen
What method of pH test was administered? Using Strips? pH pen? -
How often are you watering? When on 1st pot a bit every day, in 24hs the soil was very dry, new pot just once
When was your last feeding and how often are you feeding? 2 days ago
What size bulb are you using? plantastar 250w
What is the distance to the canopy? about 20cm
What is your RH Factor? (Relative Humidity) about 40%
What is the canopy temperature? 29c
What is the Day/Night Temp? (Include fluctuation range) day 29c/night 20c
What is the current Air Flow? (cfm etc.) 175m3/hour
Tell us about your ventilation, intake exhaust and when its running and not running ? rvk100 exhaust, passive intake,6" fan above conopy all 24/7
Is the fan blowing directly at plants? Y
Is the grow substrate constantly wet or moist? N
Is your water HARD or SOFT? Hard
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Half mineral half tap (24h rest)
Are you using water from a water softener? N
Has plant been recently pruned, cloned or pinched? N
Have any pest chemicals been used? If so what and when? N
Are plant's infected with pest's? N

cheers

 

[Cib]

Hi

for me it's hungry..and abit of pH f**cked up...try add some dolomite lime, wait few days and raise the Biogrow

my humble 2 cents

ahhh and give it away the mineral water...stick to the tap water rested 24h and you be good

cheers and good luck

 

[dunkybones]

They look very hungry. Is a 1/4ml per liter what Biobizz recommends for starts? I'd double it and wait to see a change.

 

[jorgeblen]

yeah I think you guys are right, they might be hungry, lets see their reaction with this new soil.
biobizz recommends for start 1ml/L, but for cuttings, i dunno for seedlings.
For next watering a bit more of biogrow should do the trick

should I cut off this dark spot?

ps: just chucked away the mineral water

cheers

 

[reckon]

Hi

for me it's hungry..and abit of pH f**cked up...try add some dolomite lime, wait few days and raise the Biogrow

my humble 2 cents

ahhh and give it away the mineral water...stick to the tap water rested 24h and you be good

cheers and good luck

that only works if there is CHLORINE in the water,...if the city water company is using CHLORAMINE, you could wait 800 years, and it's still in there,...only reverse osmosis will remove chloramine.

so CHECK your water, don't guess, most water companies or health depts. offer free water testing, then you can decide what to do from there.

the plants look chlorotic, but the structure, and leaf shape look good, just super pale,........check the PH of the water going in, and the PH of the runoff coming out,...if it's between 6.0 and 7.0, I would add some liquid ferts.

you could also foliar feed ONE, if it darkens up in a day or so, then hit em all with a light foliar feeding, AND an application of liquid fert to the water/soil.

I think they are just hungry, you just have to figure whether it's lock up, or depletion.

 

[jorgeblen]

My water supplier DOES use chloramine (ammonia in reaction to chlorine, right?) ...
Heard that not even RO removes this shite, what one should do in this case?

just hope it is not a lockup

thanks

 

[jorgeblen]

is foliar feed with blackstrap molasses a good idea??

 

[Cib]

so...
how are the plants ?

cheers

 

[kmk420kali]

only reverse osmosis will remove chloramine.

That is incorrect--

Will reverse osmosis remove chloramines?
No. Salts can be caught by the permeable membranes but chloramines pass through easily.

http://www.norfolk.gov/utilities/quality/Chloramines.asp

Chloramine cannot be removed from water by boiling, distilling or reverse osmosis, which at least helps to narrow your options! Beware of any company trying to sell you one of these as they simply don't work.

http://www.articlesbase.com/health-articles/how-to-remove-chloramine-from-water-952134.html

Practically all of the filters on the market are effective for chloramine removal, from the inexpensive pitchers to the pricey multi-stage models. The only systems that will not remove chloramines are the reverse osmosis types. They do not remove any chemicals, at all. Some of the newer brands, such as GE Smart-water, include reverse osmosis and a granular carbon step. That's effective, but it costs more than you need to pay.

http://ezinearticles.com/?Chloramine-Removal-on-the-Home-Front&id=2661027

As I said in another Thread....

This is what I use...no probs since I got it--
http://www.hydrologicsystems.com/content/view/16/117/

https://www.icmag.com/ic/showthread.php?t=163145

 

[jorgeblen]

So, the plants are fine, healthy with very dark green leaves now

I done a few things to try ti recover them, i think everything helped a bit

1) foliar feed with 1ml of biogrow per litre (just once)
2) started filtering the water with a brita filter
3) more biogrow and blackstrap molasses every other watering

cheers

 

[reckon]

That is incorrect--

http://www.norfolk.gov/utilities/quality/Chloramines.asp


http://www.articlesbase.com/health-articles/how-to-remove-chloramine-from-water-952134.html


http://ezinearticles.com/?Chloramine-Removal-on-the-Home-Front&id=2661027

As I said in another Thread....

https://www.icmag.com/ic/showthread.php?t=163145

I stand corrected, and I ordered one of those filter setups

good stuff thanks, and glad to see op's plants are better too

 

[kmk420kali]

So, the plants are fine, healthy with very dark green leaves now

I done a few things to try ti recover them, i think everything helped a bit

1) foliar feed with 1ml of biogrow per litre (just once)
2) started filtering the water with a brita filter
3) more biogrow and blackstrap molasses every other watering

cheers

The Blackstrap is great for feeding your Micro-Herd...If you would give them a li'l liquid Kelp...they would love it--
Good job on correcting the problems--