Possible Nute Burn?

[Dannyy]

Hi all! Pretty new to this site but thus far it has provided me with a lot of help and info, some very knowledgeable individuals here! So this evening I went to water my 22 day old purple lemonade auto and noticed a few yellowish brown patches on her 2 bottom sets of first leafs, the rest of the plant looks great! Anybody know if this is possible nute burn? Or something else?
She’s under a 400w hps 20/4 and in a soil medium using AN nutrients for the past week.
I’m not overly concerned at the minute but thought I’d ask in advance incase this further develops!
Thanks for the read
-D-

 

[LittleMT]

No worries, the older leaves will die, fade, get used by the plant, she is doing what she is suppose to do.... Those lower leaves are old, not getting light, doing what they do....... I would let it be, stay out of the way, and let your weed be a weed.....

 

[Mañ'O'Green]

@Dannyy Welcome to AFNYes that does look like the beginning of a nutrient problem. I need to check the DLI of a 400w HID but you may be running the lights to long as well. In the meantime fill this out and lets see if we can tell what is going on.

Please fill in this form: (copy and paste part is below, this first one tell what specifically to include)

-Problem: (brief description)
-Medium/grow method: soil; soilless-- coco, or peat based like Promix, etc. (please provide the actual product name); DWC, NFT, etc.
-Feed and supplements used: include brand, dosage/strength, frequency of feeding and watering (alone); method-- by hand, drippers, rercirc' or drain-to-waste,... N-P-K #'s too if you can!
-Water source: RO/DI; tap- dechlorinated-?..... EC or TDS reading; pH (don't bother with this on RO/DI, do bother with TDS/EC though to confirm it's working well enough)
-Strain and age
-Climate: night and day ambient T and RH%; res' temperatures; any extremes in T/RH% exposure
- Light used: HID, LED, COB, combo of,... wattage; light cycle hours (20/4, 18/6 , etc.); distance to tops....
-Additional info: PH in the root zone. How long have the plants been affected?...How fast did symptoms appear?... Anything else you think might be relevant..

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics! Turn off the grow lights.

✂ - - - - - - - - - - -
(copy and paste)-->

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

PH in the root zone:

Strain/age:

light used:

Climate:

Additional info:

 

[Dannyy]

Thanks!! Here’s the info -


Problem: Small light brown patches on first and second set of bottom leafs.

Medium/grow method: Soil medium - canna terra plus.

Feed: and supplements used: Advance Nutrients micro, grow and bloom @ 1ml each per litre (feed, water, water, feed. . . ) + 2ml/L Rhizotonic. Last feed 2ml of Calmag was added. PhD adjusted to 6.0

water source: Spring water ( tap water is WAY to hard here)

PH in the root zone: 5.9

Strain/age: FastBuds Purple Lemonade Auto 22 days old. 18.5inc (47cm)

light used: 400W HPS 20/4 12 inches from bulb.

Climate: Lights on 22.5c 50% Rh
Lights off 20.c 65 Rh

Additional info: symptoms occurred yesterday. So far everything’s been running smooth!
-D-
Below are some pictures . . .







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[Dannyy]

As Bellow