Need help

[Pnwgrown]

Problem: noticed some brown spots on leaves.

Medium/grow method: #4 soil Nectar for the gods

Feed and supplements used: nectar for the gods spartan regimen half dosage, fed once and just water feeding once ph was 6.3

water source: well water
34 ppm
PH 6.19


Strain/age: zkittlez and its 1 week old

light used: bestva dc series 2000w LED grow light
20/4 light schedule
24 inches from top of plants.

Climate: 60% - 65% humidity and 70° - 75°f

Additional info: did a slurry test and ph is 6.7 and ppm is 147. I noticed these spots yesterday and they seems to be spreading fast.

 

[Mañ'O'Green]

Hi @Pnwgrown Welcome to AFN I will move this to the Infirmary. Please fill out the form below and get pictures in white light and we will do what we can to help you.

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!

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

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

 

[Pnwgrown]

@Mañ'O'Green

 

[Mañ'O'Green]

I am not familiar with the soil/nutrient line so I cannot speak to their quality control. It is possible the plant just hit a hot spot in the soil? I would use their nutrients at least 75% as they lean to the organic side which is not as hard and fast acting as salts. They do have salts though so be sure to get 10% - 15% run-off every day. Be sure to fertigate the entire pot.

I like the make-up of their soil!

Your well water is beautiful! It is low in carbonates so I would add 50 PPM of Cal-mag to your nutrient water before mixing in the other nutrients.

 

[Pnwgrown]

I am not familiar with the soil/nutrient line so I cannot speak to their quality control. It is possible the plant just hit a hot spot in the soil? I would use their nutrients at least 75% as they lean to the organic side which is not as hard and fast acting as salts. They do have salts though so be sure to get 10% - 15% run-off every day. Be sure to fertigate the entire pot.

I like the make-up of their soil!

Your well water is beautiful! It is low in carbonates so I would add 50 PPM of Cal-mag to your nutrient water before mixing in the other nutrients.

What do you mean to get run off everyday, would i feed everyday?
and also fertigate entire pot?

 

[Mañ'O'Green]

To fertigate is to water with a nutrient solution. You want run-off everyday you do fertigate. Multiple times per week? According to Nectar of the God's :

Blend #4
Nectar’s most popular blend. A general potting mix designed for indoor and outdoor use. Suitable for multiple feedings per week. Mixed in small batches. Contains no bark or fillers. Coir fiber is rinsed on-site with Oregon rainwater and buffered with limestone to reduce salts. After blending and bagging, soil sits unwrapped and covered for up to 30 days to activate, compost and then go dormant, to avoid HOT soil. Ingredients: Sphagnum peat moss, perlite, coir fiber, pumice, mycorrhizal fungi, yucca meal, kelp meal, bone meal, diatomaceous earth, clay, basalt, oyster shell (for pH adjustment), humus and lime (for pH adjustment).

What you need to learn about fertigating will come with practice. Here are the basic rules: Never let the soil dry out. Soil and or coco can become hydrophobic if allowed to dry. This means it repels water. This in turn will create dry pockets in the soil and roots there will die. If your soil - coco have accidentally dried out use a surfactant to help re-wet it. I like yucca powder. Don't let soil remain soggy by fertigating too much too often. Root rot, damping off, molds, fungus gnats and other problems start in soggy soil. When you do fertigate water the entire pot. How to learn when to water starts before you plant the seed. Fill your container with fresh soil/coco and weigh it (heft it) this is the lightest weight and consider it a dry pot. Now slowly water until the soil/coco will no longer absorb the water and run-off begins; weigh the pot (heft it) this is the maximum water, the wettest the pot can get. The difference between wettest and driest is the maximum water weight, for ease of explanation lets just say the water weighs 20 pounds. When the pot loses 10 pounds (half of the water weight) it is time to water again. There is an art to watering.

 

[Pnwgrown]

Thank you very much. This is incredibly helpful.