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Plant yellowing, I don't think it's nitrogen related though...

Natural

Active member
Please help guys, any advice is appreciated, I'm wanting to kick my plants over to flowering but not before fixing my one sick plant.
Thank you all so much in advance! :yes:


Coco Coir

How long has this problem been going on? For about 2 - 2 1/2 weeks

Are you growing in a PVC grow tent? No, in a self built wooden cab.

What system are you running? Hand fed

What STRAIN are you growing? Bubbledust (Grow doc seeds)

What was the establishing technique? Started from seed

What is the age of your plants? Affected plant is approx a little less than a month old

How long have they been in there mixture they are in now? Same mixture (Coco, dolomite lime at 1 tablespoon per gallon, dr. earth organic mix as directed) I have been using this mix for about 1-2 years and have not have any problems until now. Started the plant in a 12 oz plastic beer cup (daisy I think?) then transplanted into a one gallon grow bag when she was about 2 weeks old.

How tall are the plants? Approx. 8-10 inches

What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? Veg

What Technique are you using? Coco organic mix, listed above, with occasional feedings of organic tea made from the dr. earth organic mix, liquid karma, and mollasses

What substrate/medium are you using? Organic coco mix

What is the Water temperature? Straight from the tap.

What color are your roots? White (saw when I transplanted) no, not slimy.

What Nutrient's are you using? Listed above previously.

How much of each nutrient are you using with how much water? 2 tsp of liquid karma, 1 tbs of mollasses, and half a cup of the dr. earth organic mix per gallon, made into a tea overnight for 24 hours.

How often are you feeding? Water them 3 times a week with just water, liquid karma, and molasses. Then give nutrients once a week as a tea since the nutes are already mixed into the soil.

How often are you giving nutrients? Once a week, the mix I listed above as a tea

What order are you mixing your nutrients? 1. Molasses, 2. Liquid Karma, 3. Dr. Earth organic mix

What is the TDS/EC/PPM you are using? don't know, been using this for years and it has always been successful for me.

When was your last watering? Just before snapping these pics I flushed the sick plant with 2 gallons of water.

What size bulb are you using? 150 watt hps cooltube

What is the distance to the canopy? 6 inches

What is your RH Factor(Relative Humidity)? 33 - 68% depending on time of day, etc.

What is the canopy temperature? Lights on, middle of light cycle, around 75F

What is the Day/Night Temp? Lights on: Maxes out around 77 F occasionally on a warm day, but usually is 70 - 73F. Night time temp drops no lower than 66-68F.

What is the current Air Flow? Vortex fan, im not sure, but it's perfect and keeps my room at a good temp and RH, I've had it for years.

Tell us about your ventilation, intake exhaust and when its running and not running ? 7 one inch holes in back of cab, with the exhaust sucking the air through the cool tube and venting under the house.

Is the fan blowing directly at plants? Yes, a small computer fan.

Is your water HARD or SOFT? Don't know, been using tap water for years and have never had this problem.

What water are you using? Tap

Are you using water from a water softener? No

Has plant been recently pruned, cloned off of or pinched? Nothing.

Have any pest chemicals been used? If so, What and When? No.

Are plant's infected with pest's? No.


Sick plant pics:
Click on thumbnails to enlarge, I tried to make all pics nice, big, and clear.​









Here are some pics of my older plants that are the same strain and in the same soil mix/fertilizer that are doing fine and have been all their life which makes me wonder why the one plant is not doing so well.





And here's a picture and some information on Dr. Earth organic fertilizer, the stuff I've been using if you've never heard of it. (I only use this for veg)



Info from their site:

Description:
A superior blend of fish bone meal, feather meal,
alfalfa meal, mined potassium sulfate, phosphate, seaweed extract, and PRO-BIOTIC seven champion strains of beneficial soil microbes plus Ecto and Endo Mycorrhizae.

Primary Uses:
Feed vegetables.
All flowers.
Bedding plants.
All tress.
Shrubs.
Annuals.
Perennials.
Potted plants.

Benefits:

Contains PRO-BIOTIC™ Seven Champion strains of beneficial soil microbes plus ecto & endo Mycorrhizae.

Usable for all planting applications
Champion soil builder

Benefits:

100% natural and organic
Stable and consistent plant growth no growth spike
100% natural and organic.
Exceptional result because nutrients are released quickly.
Feeds for several months.
Consistent premium quality.
All plants benefit from Organic 7™
Eight select strains of Ecto and Endo Mycorrhizae contribute to drought tolerance, enhanced nutrient availability and increased plant performance
100% natural/organic formula provides optimum
levels of essential plant nutrients, including important micronutrients and minerals.
Eliminates the need for chemical fertilizers when used as directed.
 

Natural

Active member
That plant is in the middle of the two others, yes the fan blows on it, but the fan isn't very powerful.
My temps never drop below 66F at night and thats on a colder night... Think that might be it? Should I point the fan away from the plants?
The reason I had the fan blowing on them is because I'm training the other two plants for a scrog and I wanted the new growth shoots to strengthen up.
 

Owl Mirror

Active member
Veteran
That plant is in the middle of the two others, yes the fan blows on it, but the fan isn't very powerful.
My temps never drop below 66F at night and that's on a colder night... Think that might be it? Should I point the fan away from the plants?
The reason I had the fan blowing on them is because I'm training the other two plants for a scrog and I wanted the new growth shoots to strengthen up.

The only way to tell if the fan is having this effect is to move the sickly plant to another area.
If the new plant that replaced this one begins turning colors and the other one gets better,
you'll have your answer.

I first thought ZINC def but, the coloring is opposite that symptom.

Good Luck !
 

hazy

Active member
Veteran
Iron def. big time.
Since you are using coco, you need to get hydro nutes.

That stuff is good for soil, because the soil provides the micronutrients.

You need to get something that has all the primaries and secondaries and micros.
like gh flora series. gh floranova. gh maxi grow and maxi bloom.
or others.

also, with coco and proper nutes, you don't need things like lime. And you should water daily. If you let the mix dry a little, then nutes will concentrate in the medium and cause problems.

And the pics of your healthy plants look iron deficient too, just not as bad.
You need new nutes.
 

20north

Member
you need something coco specific or you need something for hydroponics ... i would get some calmag for starters
 

Hydro-Soil

Active member
Veteran
Iron def. big time.
Since you are using coco, you need to get hydro nutes.

That stuff is good for soil, because the soil provides the micronutrients.

You need to get something that has all the primaries and secondaries and micros.
like gh flora series. gh floranova. gh maxi grow and maxi bloom.
or others.

also, with coco and proper nutes, you don't need things like lime. And you should water daily. If you let the mix dry a little, then nutes will concentrate in the medium and cause problems.

And the pics of your healthy plants look iron deficient too, just not as bad.
You need new nutes.
Excellent Advice! Thanks Hazy :D
 
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