yellow spots and tips..HELP PLEASE!!!

[egz91]

hi guys,
i'm new to this forum my name's ed and i'm growing 5 atuoflowers all from sweet seeds 3 red poison auto and 2 devilcream auto....today i noticed that on the leafs of my plants there are some strange yellow spots and a tip also yellowing...maybe it is wind burn or light burn or maybe just drops of water that remaining on leafs? i grow in a 80cmx80cmx160cm grow tend with a 250w hps light bulb 40 cm away from plants...here are some pics:

 

[Aqua Man]

Plants will droop at night the 2 on the edges look like they were touching the rim of the container and the media. These portions of the leaves will not be able to resipire and become damaged. The other looks like maybe some nutrient solution was dripped on it.

Plant looks like it could use a slight increase in feed.

 

[egz91]

thanks for your quick reply....actually i'm using just 1/4 of my ata terra kit nutes so maybe i should just add some more....i thought the same about yellow spots....is the light distance from canopy any good or should i change it.....it is about 40 to 50cm from plant, this is my first grow and i'm having a lot of issues with temp control....with lights on temps sometimes reach 91 degrees. I use a small clip fan and a oscillating tower fan with a 187 cubic metres per hour exhaust fan.
btw this are my nutes:

 

[Aqua Man]

I don't see any signs of light burn or heat stress. 91 may seem high but it's the leaf temp that matters. I have never used those nutes but I would bump it up just a touch, don't go overboard.

Tip for a first time grower. Small changes, one at a time.

 

[Aqua Man]

Just had an after thought. Your air temps are likely not actually 91. You should have your temp probe about canopy height and out of the light. If it's in the light the IR from your light will falsely increase the air temperature reading. I'm betting you could knock 5-10 degrees off that temp. This is a common issue for new growers that lead them to have temp issues.

I know some others may be like 91 is way to hot your going to cook your plants. But this is likely the reason they are not cooking when your thermometer is reading 91.

 

[egz91]

i attached a piece of paper on top of the igrothermometer to cover it from direct light, i also attached another one to the left side of the tend near the entrance higher then the light and it measurs 91 when in the middle of light cycle. Thank you for your advice....Last question, do you feed every time you water or in between feedings you just give em water? i know it dipends on nutes type and brand but maybe you can give me a general idea about it.

 

[Aqua Man]

i attached a piece of paper on top of the igrothermometer to cover it from direct light, i also attached another one to the left side of the tend near the entrance higher then the light and it measurs 91 when in the middle of light cycle. Thank you for your advice....Last question, do you feed every time you water or in between feedings you just give em water? i know it dipends on nutes type and brand but maybe you can give me a general idea about it.

I grow in hydro. What media is that you growing in? It will determine how you best feed without under or over watering.

 

[egz91]

I use bio canna terra plus soil:

 

[Aqua Man]

I use bio canna terra plus soil:

Wait for a soil grower to pop in. If you don't get a reply then make a new thread directed at the question.

I could attempt to give some advice but rather you get some from an experienced soil grower.

 

[Beachwalker]

thanks for your quick reply....actually i'm using just 1/4 of my ata terra kit nutes so maybe i should just add some more....i thought the same about yellow spots....is the light distance from canopy any good or should i change it.....it is about 40 to 50cm from plant, this is my first grow and i'm having a lot of issues with temp control....with lights on temps sometimes reach 91 degrees. I use a small clip fan and a oscillating tower fan with a 187 cubic metres per hour exhaust fan.
btw this are my nutes:
View attachment 887784

Get your temperatures below 85 for best results or you'll run into issues as they grow

I looked up your soil

I have recently grabbed a bag of something similar to it for cheap to mix in with my ffof but I haven't started using it yet and one of the things I've been trying to do is to ascertain the proper pH for this type of media, and I'm still looking? what have you been pH'ing your liquids to?

 

[Aqua Man]

i attached a piece of paper on top of the igrothermometer to cover it from direct light, i also attached another one to the left side of the tend near the entrance higher then the light and it measurs 91 when in the middle of light cycle. Thank you for your advice....Last question, do you feed every time you water or in between feedings you just give em water? i know it dipends on nutes type and brand but maybe you can give me a general idea about it.

Temps at the top of the tent and canopy will be different. How much depends on how close the prob is to the light and the amount of air exchange.

 

[Aqua Man]

Get your temperatures below 85 for best results or you'll run into issues as they grow

Here is a soil grower^^^ have at em lol

 

[egz91]

Hi beachwalker thanks for joining in...i ph at 6.5 and today i will feed a little heavier as suggested by aquaman earlier (i think i nailed it). that means i will give plants 1ml of root fast, 5ml of terra leaves, and 1.5ml of terra max the last one is for bloom but as they are autos maybe it is worth the try. Nutes i use are in photo above.

 

[Beachwalker]

Here is a soil grower^^^ have at em lol

Don't throw me under the bus! LOL :)

I found it buddy here you go adjust your pH to 6.0 see how it does there (6.5 might be why it's light green?), here's some more info on your product as well

CANNA Grow Guide | A personalized Feeding Chart | CANNA

The complete CANNA growing guide and nutrient calculator including how to instructions for growing in hydroponic systems. ✓ Read more in this article >

www.cannagardening.com

 

[egz91]

it is hard for me to low temparatures down as it's freakin' hot this days and my tend is in my garage with no windows the only way i can let air in is by leaving the entrance half way open so the air is coming from outside.

 

[Beachwalker]

Hi beachwalker thanks for joining in...i ph at 6.5 and today i will feed a little heavier as suggested by aquaman earlier (i think i nailed it). that means i will give plants 1ml of root fast, 5ml of terra leaves, and 1.5ml of terra max the last one is for bloom but as they are autos maybe it is worth the try. Nutes i use are in photo above.

I would adjust my pH before I increased the PPM because I suspect it's more of a lockout than not enough available nutrients

 

[Beachwalker]

it is hard for me to low temparatures down as it's freakin' hot this days and my tend is in my garage with no windows the only way i can let air in is by leaving the entrance half way open so the air is coming from outside.

Then move LOTS of air!

 

[egz91]

you think i should lower the ph beacuse of the type of soil i'm using?

 

[egz91]

are you sure about lock out? i will try only with ph 6 water for today and then see how it goes.

 

[egz91]

i'm using atami nutes btw.