Nute Deficiency? New grower.

[whaler007]

Excuse my lack of knowledge, this is my first grow.


I have 3 seedlings that are starting week 2. (popped on 1/3/2021)
2.3x2.3x5.25FT MarsHydro tent
MarsHydro TS1000, 17 inches above highest growth, 100% strength (i thought it was at 20+ inches but I guess I forgot to raise it once transferring to solo cups)
Grow Medium: Mother Earth Coco Plus Perlite Mix (70 coco 30 perlite)
Genetics: Greenpoint Seeds, Purple Crash
PH: 6.3-6.5 measured before nutes, tap water.
Nutes: botanicare CAL-MAG plus & general hydroponics series.

Current Nutes:

1/4 tsp micro
1/8 tsp gro
1/8 tsp bloom
2ml CAL-MAG.

these plants were germinated in paper towels and then transferred to Jiffy pellets (the ones that come dehydrated)

Now the jiffy pellet sits directly in a clear solo cup filled with coco, and the clear cup is then placed in a red solo so I am able to observe the roots without light damaging the roots.

They have been watered in their solo cups 3 times until runoff. Otherwise, I have been keeping the top of the coco moist with a spray bottle (with nutes). The runoff today ran at only 125 PPM.


My questions for today:

1. Should I up the general hydroponics to 1/4th strength, and if so how much CAL-MAG should I provide?

2. Should I worry about the brown spot on the new growth shown in the close-up picture? I'm assuming they just need more nutes since the runoff PPM was only 125. Possibly light burn from only being 17 inches about growth? let me know.

3. Also, how do the plants look growth wise? are they at a normal size, or is that purely based on genetics?

4. How's your day going?

 

[Jjgrow420]

Why do people continue to feed seedlings?????
Ya burnt em bro. No need to feed until they get some leaf sets coming up. Ill feed them 1/2 strength rapid start about 10 drops per ltr only when they get about that big and only once every 2 waterings

 

[Jenko]

Deffo just water for a while

 

[whaler007]

Why do people continue to feed seedlings?????
Ya burnt em bro. No need to feed until they get some leaf sets coming up. Ill feed them 1/2 strength rapid start about 10 drops per ltr only when they get about that big and only once every 2 waterings

Weird, so my thought was that they didn't get enough nutrients, but it's too much? Every chart I can find suggest feeding seedlings small nute doses, especially calmag, if they're in coco. My understanding is that low PPM means that the plants are uptaking all of the nutrients I'm providing and that they need more. Please explain more! Also, I don't have any rapid start so ill just switch to PH balanced water. Thank you.

 

[whaler007]

Deffo just water for a while

Nute burn?

 

[Jjgrow420]

Ya sorry i dont use coco. Too much bs and too exp imo
A seedling should only start to be fed when true leaves appear. And even then it doesnt need much. I feed a small plant a first dose of the rapid start @ 10 drops per ltr. Which works out to like 1/4 of a teaspoon. Thats it. No grow no bloom no micro nothing else. when i can see the seedlings starting to harden off when you can tell theres a good bit of roots set in and stem starts hardening up and leaves start to get bigger thats when ill give them the 'aggressive' dose of double that. Just that. Once the plant begins growing reg sets of leaves i use 1/4 strength of an a+b or 3part veg formula. Then plain water until i see the plant can take it once its about 3 sets of true leaves it can take a higher dose or w/additives.
Thats my goto in promix. Never burn a seedling and they grow super fast
If you're using tap water why you adding cal mag you just raisin ur ppm for nothin
Whats your tap water ppm
What kind of meter you using? Not a 20 dollar amazon special i hope. Might as well be using a random number generator lol thats about how accurate those are

 

[CannaCountry]

If you're running coco...don't try to grow it like it's in soil....rule # 1
rule # 2....quit trying to diagnose any sort of plant issue with such small plants.
I run coco, and I feed from day 1...period. And you don't stop until you come down to their final days...period.
Personally, I run a 25% solution for week 1, which you've just finished, if they popped on 1/3, 50% solution for week 2 and then 100% from there on out. Coco is not soil...so don't treat it as such...and you'll be fine. God bless.

 

[kovidkough]

lower your light to 50% and 17in is very close for seedlings.

too much light

coco needs food from the get go, ignore the idiots that didn't read your post throughly. use 1/4 strength feed for 2 weeks. feed 2-300ppm of balanced nutrients, add 1ml of calmag per gallon of medium , so 1 gal bucket add 1ml of calmag, 3gal 3ml, never failed me.

good luck

 

[whaler007]

lower your light to 50% and 17in is very close for seedlings.

too much light

coco needs food from the get go, ignore the idiots that didn't read your post throughly. use 1/4 strength feed for 2 weeks. feed 2-300ppm of balanced nutrients, add 1ml of calmag per gallon of medium , so 1 gal bucket add 1ml of calmag, 3gal 3ml, never failed me.

good luck

thank you!! I have adjusted the lights. I want to make sure that I understand PPM, so correct me if I am wrong. The PPM of my tap water is 66. I added a dose of my nutes in a 1g jug and the PPM went up to 328. Does this mean I added 262 PPM of nutes? (328-66). Which fits right into the 2-300 range. Also thank you for the calmag tip thats really helpful and makes a lot of sense!

 

[whaler007]

If you're running coco...don't try to grow it like it's in soil....rule # 1
rule # 2....quit trying to diagnose any sort of plant issue with such small plants.
I run coco, and I feed from day 1...period. And you don't stop until you come down to their final days...period.
Personally, I run a 25% solution for week 1, which you've just finished, if they popped on 1/3, 50% solution for week 2 and then 100% from there on out. Coco is not soil...so don't treat it as such...and you'll be fine. God bless.

yeah, I assumed I'd get called out for being a worrywart, I think I'm just a little excited, lol. Thank you for the tips!

 

[whaler007]

Ya sorry i dont use coco. Too much bs and too exp imo
A seedling should only start to be fed when true leaves appear. And even then it doesnt need much. I feed a small plant a first dose of the rapid start @ 10 drops per ltr. Which works out to like 1/4 of a teaspoon. Thats it. No grow no bloom no micro nothing else. when i can see the seedlings starting to harden off when you can tell theres a good bit of roots set in and stem starts hardening up and leaves start to get bigger thats when ill give them the 'aggressive' dose of double that. Just that. Once the plant begins growing reg sets of leaves i use 1/4 strength of an a+b or 3part veg formula. Then plain water until i see the plant can take it once its about 3 sets of true leaves it can take a higher dose or w/additives.
Thats my goto in promix. Never burn a seedling and they grow super fast
If you're using tap water why you adding cal mag you just raisin ur ppm for nothin
Whats your tap water ppm
What kind of meter you using? Not a 20 dollar amazon special i hope. Might as well be using a random number generator lol thats about how accurate those are

Correct me if im wrong, but I believe that all of these suggestions don't pertain to me because I am using coco. This medium required calmag and feeding early on because coco doesn't have the nutrients that soil has. Thank you anyway! Tap water PPM is 66 and with my nute mix it rose to 328.

 

[Fishbulb]

Excuse my lack of knowledge, this is my first grow.


I have 3 seedlings that are starting week 2. (popped on 1/3/2021)
2.3x2.3x5.25FT MarsHydro tent
MarsHydro TS1000, 17 inches above highest growth, 100% strength (i thought it was at 20+ inches but I guess I forgot to raise it once transferring to solo cups)
Grow Medium: Mother Earth Coco Plus Perlite Mix (70 coco 30 perlite)
Genetics: Greenpoint Seeds, Purple Crash
PH: 6.3-6.5 measured before nutes, tap water.
Nutes: botanicare CAL-MAG plus & general hydroponics series.

Current Nutes:

1/4 tsp micro
1/8 tsp gro
1/8 tsp bloom
2ml CAL-MAG.

these plants were germinated in paper towels and then transferred to Jiffy pellets (the ones that come dehydrated)

Now the jiffy pellet sits directly in a clear solo cup filled with coco, and the clear cup is then placed in a red solo so I am able to observe the roots without light damaging the roots.

They have been watered in their solo cups 3 times until runoff. Otherwise, I have been keeping the top of the coco moist with a spray bottle (with nutes). The runoff today ran at only 125 PPM.


My questions for today:

1. Should I up the general hydroponics to 1/4th strength, and if so how much CAL-MAG should I provide?

2. Should I worry about the brown spot on the new growth shown in the close-up picture? I'm assuming they just need more nutes since the runoff PPM was only 125. Possibly light burn from only being 17 inches about growth? let me know.

3. Also, how do the plants look growth wise? are they at a normal size, or is that purely based on genetics?

4. How's your day going?

View attachment 4792140
View attachment 4792142

It's a seedling just water till the third set of leaves. It doesn't have a root system yet to deficient

 

[whaler007]

It's a seedling just water till the third set of leaves. It doesn't have a root system yet to deficient

Maybe it's not really considered a full root system, but I do see many roots developing in the clear solo cup. There are even some trying to poke out of the drainage holes on one of the plants. This is when I started feeding nutes since I saw that roots were developing, but they weren't getting nutrients because they are in coco. Let me know if this is developed enough, or do you believe that the cotyledons can provide it all?

 

[Fishbulb]

I'm in Coco and they get nothing till the third set then I feed what ever the other veg plants get

Maybe it's not really considered a full root system, but I do see many roots developing in the clear solo cup. There are even some trying to poke out of the drainage holes on one of the plants. This is when I started feeding nutes since I saw that roots were developing, but they weren't getting nutrients because they are in coco. Let me know if this is developed enough, or do you believe that the cotyledons can provide it all?View attachment 4793101

Honestly I'm not taking the piss,or pulling your leg or telling you an old wives tale. Just give it water till the third set of leaves. The seed has everything it needs then once u see the third set then feed lightly at 5.8ph. in Coco that won't take long at all.

These are roots u can feed

 

[all coco]

I feed coco at least 400 ppm from day of sowing the seeds. I'd do 3ml / gal calmag and follow GH's feed chart for week 2: micro 4ml, gro 5ml, bloom 1ml and then dilute to 450ppm.

 

[Jjgrow420]

I duno man been growing for almost 20 yrs. Never fert a seedling and never burnt em
But hey do whatever you think is right!