first grow black spots (pics included)

Alright this is my first grow and everything seems to be going alright but i just have a few problems with some of the leaves , i've researched it throughly and still havent came up with a solid anwser? the leaves get a brown spotchy patches on them the i thought it might be a phosphuros deff. but i wasnt to sure and would like to get a second (or third..)


A use a 250watt sun light sun system lighting
temps around about 82F high and 74 low F
humidity around 44%

i also was wondering what anyone thought of the fan on the right and a duck going from my ac vent and venting into my martha stewert tent? thanks , INTRIKIT:thumbsup:

pH HAS BEEN being set with a drip drop test and been keeping it around 6.5 but not sure it thats to accurate but i have a digital water ph test kit in the mail should be here in a couple more days than i can get the accurate as possible. anyhtin else i might be forgeting you need to know..?

Havent gotten any replies so I hope this helps. looking foward to stinky's words if you could be so nice.. they are actually brown and somtimes really dark though.. i woud just like to know why they are there and if it is phosphorus deff.??


-indoor or outdoor --------indoor
-soil, soilless, or hydroponic--------organic pete soil
-specific medium---
-Soil type/brand--------organic petes
-Hydro/aero/soilless system type -- N/a
-Anything you have added to the soil - n/a
-Soil pH - 6.0 - 6.7 for all three
-Water source -spring jugs - (wondering if this is ok or ) or Tap W/ cal-mag - what is cal-mag please?????
-Water pH - adjusted to 6.5 ish before watering
-Age of plant - about 5 months / couple weeks
-Type of fertilizer - earth juice . micro/bloom/grow
-Rate of application---every watering about / about 4 times a week/ (use weight theory to water.)
-Lighting source and distance from plant - 250 watt hps , about 8 inches away
-Temperature (both day and night if you are running a dark period) - 82F high - low of 74F
-% Relative humidity - 45%
-Lighting schedule--12/12
-Type of ventilation your room has- fan on right blowing outwards littlwe fan on bottom and a/c vented to my closet

Quote:

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Originally Posted by INTRIKIT 7 FINGERS

-soil, soilless, or hydroponic--------organic pete soil
-Soil pH - 6.0 - 6.7 for all three
-Water source -spring jugs - (wondering if this is ok or ) or Tap W/ cal-mag - what is cal-mag please?????
-Water pH - adjusted to 6.5 ish before watering
-Type of ventilation your room has- fan on right blowing outwards littlwe fan on bottom and a/c vented to my closet

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Okay these are the things that stood out.

Peat based soil is very low pH. You want 6.5-6.8 for your soil and water.

CalMag is a micro supplement that just has Ca Mg and I think some Si(?) in it. You don't have to use it with tap water, and tap water is FINE.

Water pH- adjust it up to 6.9. I think you are seeing pH lockout problems plus....

Your ventilation is inadequate. That was my first impression actually seeing those blotches. Your plants are quite literally suffocating. You need to be bringing in plenty of fresh air, especially when the lights are on. This may be as simple as simply opening the door to your grow chamber during the light period.

Also I didn't see, but check that you have a gallon of soil for each foot of main stem on that plant. Rootbound plants are a right bitch to troubleshoot.

stinky . i just transplanted from littlle pots to the ones there in now they'er plastinc still do u think that will cause a big problem if that ratio is not exact? should i transplant them to bigger pots?

what exactaly is rootbound? not enough space for roots to grow?

ratio doesnt have to be exact at all. rootbound means the pot is too small and the roots are a big lump o ...root!

Cool I think I'll be ok since they were just transplanted to double the size that they were in before and they're 2 and a half weeks into floweing. I haven't seen any damage from the transplant. Thanks for the input i apprceiate it. - INTRIKIT