Magnesium Deficiency?

K

KyleLyleTheCrocodile

Member
Hey y'all
New member, first time grower. I started my grow with some seeds a lady at a farmer's market gave to me for free. Strain is called Moondawg, can't find much information on it other than that it is from Loompa Farms... Anyways there was about a 50% germination rate of the seeds, and I ended up getting four plants past seedling. The one on the furthest left is the smallest, really not responding well, but is the only reason I have to think what I have might otherwise be light damage? I am using a Mars Hydro TSL-2000 in a 2x4 tent, the lights are 50% dimmed and are over 12 inches away from the plants... so for the other three, based on pictures of diagnoses I have seen online I can't tell if it is a magnesium deficiency, or maybe just too early to tell for a light burn?

I transferred to these pots about a week ago and I am using Fox Farms' Happy Frog and Build A Soil's Light formula. Mixed equally between all pots. I started the seedlings in MiracleGro soil.

One of the photos can't upload but I think these two closeups are representative.
IMG_5767 2.JPG
IMG_5771.JPGIMG_5772.JPG
 
CaliRootz88

CaliRootz88

Well-Known Member
Hi Kyle! Welcome to rollitup! (:
That light is nice for your 2x4 setup.
At 50% dimmed and only 12” above the canopy that is overkill for plants this size.
Try 25% and raise the light 36-48” above the canopy and observe a few days.
What’s your temps and humidity levels at?
How much water did you put in when you transplanted?

You may need to wait 4-5+ days before another watering is required.

Since you just transplanted to a bigger pot only water them with water for the next two weeks only when needed.

Less is more in this scenario. Damage is done. I would observe NEW GROWTH for healthiness and green coming in. That’s a sign you’re back on track.

@KyleLyleTheCrocodile
 
Last edited:
calvin.m16

calvin.m16

Well-Known Member
CaliRootz88 said:
Hi Kyle! Welcome to rollitup! (:
That light is nice for your 2x4 setup.
At 50% dimmed and only 12” above the canopy that is overkill for plants this size.
Try 25% and raise the light 36-48” above the canopy and observe a few days.
What’s your temps and humidity levels at?
How much water did you put in when you transplanted? You may need to wait 4-5+ days before another watering is required.
Click to expand...
Definitely too much light for such small plants, try the Photone app on your phone to see what your PPFD is at the top of the plants, you want to follow these guidelines, generally speaking.
PAR Levels (PPFD)
Seedling / Clone: 100 – 300
Vegetative: 250 – 600
Bloom / Flowering: 500 – 1050

Your roots haven't grown into the new soil yet so it will take time before they start pulling proper nutrition from it, as CaliRootz said let them dry back and then water again to stimulate root growth into the new soil. They'll be fine just keep your environment in check and make sure not too much light. :)
 
PadawanWarrior

PadawanWarrior

Well-Known Member
KyleLyleTheCrocodile said:
Hey y'all
New member, first time grower. I started my grow with some seeds a lady at a farmer's market gave to me for free. Strain is called Moondawg, can't find much information on it other than that it is from Loompa Farms... Anyways there was about a 50% germination rate of the seeds, and I ended up getting four plants past seedling. The one on the furthest left is the smallest, really not responding well, but is the only reason I have to think what I have might otherwise be light damage? I am using a Mars Hydro TSL-2000 in a 2x4 tent, the lights are 50% dimmed and are over 12 inches away from the plants... so for the other three, based on pictures of diagnoses I have seen online I can't tell if it is a magnesium deficiency, or maybe just too early to tell for a light burn?

I transferred to these pots about a week ago and I am using Fox Farms' Happy Frog and Build A Soil's Light formula. Mixed equally between all pots. I started the seedlings in MiracleGro soil.

One of the photos can't upload but I think these two closeups are representative.
View attachment 5235186
View attachment 5235185View attachment 5235189
Click to expand...
Like everyone else is saying that's too close, especially at this stage. I'd download a free Lux App too to give yourself an idea.

I like your choice of soil, but what do you plan to feed? And I'd water the whole pot. Watering it good would probably solve half the issues if you ask me.

And that looks more like K deficiency than Mg. Anyways I'd water those girls.
 
K

KyleLyleTheCrocodile

Member
CaliRootz88 said:
Hi Kyle! Welcome to rollitup! (:
That light is nice for your 2x4 setup.
At 50% dimmed and only 12” above the canopy that is overkill for plants this size.
Try 25% and raise the light 36-48” above the canopy and observe a few days.
What’s your temps and humidity levels at?
How much water did you put in when you transplanted?

You may need to wait 4-5+ days before another watering is required.

Since you just transplanted to a bigger pot only water them with water for the next two weeks only when needed.

Less is more in this scenario. Damage is done. I would observe NEW GROWTH for healthiness and green coming in. That’s a sign you’re back on track.

@KyleLyleTheCrocodile
Click to expand...
Thank you for the advice. I will dim and raise the light.

I added a gallon of water between the four plants, I was under the impression it was best to soak them for a transplant. I used some mycorrhiza supplement as well, a bit less than 1/4 tsp for the gallon (recommended 1 tsp for 5 gallons, I don't have a 1/5 tsp lol). It was distilled water from the store.

I have the AC Infinity set to 50-70% humidity, and 70-80 degrees Fahrenheit. Pretty wide range, but it stays more along the lines of 75 degrees and 45% humidity. Yeah I noticed I will need to water much less for a while, although one of the plants seemed to soak up water like a sponge.
 
K

KyleLyleTheCrocodile

Member
calvin.m16 said:
Definitely too much light for such small plants, try the Photone app on your phone to see what your PPFD is at the top of the plants, you want to follow these guidelines, generally speaking.
PAR Levels (PPFD)
Seedling / Clone: 100 – 300
Vegetative: 250 – 600
Bloom / Flowering: 500 – 1050

Your roots haven't grown into the new soil yet so it will take time before they start pulling proper nutrition from it, as CaliRootz said let them dry back and then water again to stimulate root growth into the new soil. They'll be fine just keep your environment in check and make sure not too much light. :)
Click to expand...
Thank you for the advice, I didn't even know about that app! Seems the consensus is to cut back on the light.
 
K

KyleLyleTheCrocodile

Member
PadawanWarrior said:
Like everyone else is saying that's too close, especially at this stage. I'd download a free Lux App too to give yourself an idea.

I like your choice of soil, but what do you plan to feed? And I'd water the whole pot. Watering it good would probably solve half the issues if you ask me.

And that looks more like K deficiency than Mg. Anyways I'd water those girls.
Click to expand...
As for nutrients... I have no clue yet. I am figuring this out as I go... I didn't even buy the Cannabis Handbook until the seeds were already germinated, and I didn't get the tent and set up until after they had already developed about 2 weeks of being seedlings.

I just about finished the soil chapter, next is the nutrients. I got one of those fancy pH/TDS/EC meters and my pH is 7.3 (I forget the other values), I need to start figuring out what I need to do as far as water treatments too!

Thank you all for your advice!
 
LeastExpectedGrower

LeastExpectedGrower

Well-Known Member
Bud man 43 said:
Photone app is most accurate using 22 lb 98 brightness paper-
Click to expand...
So much depends on phone hardware. I did a test against my Phantom Photobio quantum meter and it was pretty darn right-on. But do know others who have had other hardware that wasn't as accurate. At the very least it works in a pinch to rough in your lighting if you don't have anything else. I do really like the DLI calculator that's on the Photone website...a really useful tool for lighting.
 
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