seedlings yellowing

[din5]

just use the new bag of soil you got with the tap water, that's been left out. dont change nothing, maybe add 1 ml cal/mag to 1ltr of left out tap water and spray them if they start yellowing. change the ph of the water after 2 weeks of growth. but do spray them with the cal/mag after lights out might be locking out mag from the led lights, just throwing some ideas at you.

tho you have had the same issue with MH light. just try foliar feed of cal/mag when yellowing starts and pray.

if you've used RO water and Tap water and Distilled water and all the same and you've tried different soils and still the same issue, and different lights then there is only one answer.
defiencency. even tho there so young. atleast if you folier feed with a light cal/mag and micro nutes in it then that's something else you can tick of the list.

 

[cc2arms]

1. Lights to close. 2.Something is wrong with your soil mix.PH should not matter this early unless your using chemical nutes that cause lockout but it's way to early for that to happen.My opinion is you have something in your soil mix that came from the manufacturer.I wouldn't feed yet but just see if it continues on it's own or clears up.Try some different soil mix like promix or sunshine mix.

It can happen I mixed equal parts Ocean Forest, Happy Frog, & Roots Organics and long story short wasn't good, next time I started in just straight coir with rainwater and placed that on top above soil mix. ;-)

 

[Joe383]

I can not see your pictures. Do your pots have drainage holes in them. I water my pots, let the pots drain a little than I plant my sprouted seedlings in them and cover the pot with plastic wrap so the soil dose not dry out.

It can happen I mixed equal parts Ocean Forest, Happy Frog, & Roots Organics and long story short wasn't good, next time I started in just straight coir with rainwater and placed that on top above soil mix. ;-)

The roots has always had a low PH out of the bag for me and the ocean forest is super hot. I have started using the roots organic with some steer manure and lime in it with great results but you have to let it sit for at least 2 weeks before using it in a warm place after adding every thing.

I am way curious as to what your problem is. Try following some one else's grow to a T and see if you still have the same problem. I have had great success in the past with Fox Farms Happy Frog soil strait out the bag and using bottled water. I start in a 16 ounce solo cup with 5 holes punched in the bottom for drainage and transplant at week 2 from sprouting above soil surface.

 

[cc2arms]

I can not see your pictures. Do your pots have drainage holes in them. I water my pots, let the pots drain a little than I plant my sprouted seedlings in them and cover the pot with plastic wrap so the soil dose not dry out.



The roots has always had a low PH out of the bag for me and the ocean forest is super hot. I have started using the roots organic with some steer manure and lime in it with great results but you have to let it sit for at least 2 weeks before using it in a warm place after adding every thing.

I am way curious as to what your problem is. Try following some one else's grow to a T and see if you still have the same problem. I have had great success in the past with Fox Farms Happy Frog soil strait out the bag and using bottled water. I start in a 16 ounce solo cup with 5 holes punched in the bottom for drainage and transplant at week 2 from sprouting above soil surface.

I soak the hell out of the final container filled with soil of course, take a solo cup push it straight down in the middle of pot scoop out whats in cup, fill just cup with seedling medium. ;-)

 

[Joe383]

No drainage holes in cup?

 

[cc2arms]

 

[cc2arms]

no bottom on cup, cup just serves purpose of giving seedling chance to establish it's self before getting to bottom of cup at which time it enter hot soil ;-)

 

[Trapper]

When you say "straight coir" you don't mean Coco Loco do you? Because I couldn't get a seedling to NOT yellow in that medium...
Furthermore, I have sworn off all Fox Farms mediums due to quality control and ph issues. I brought my soil meter to the store
(I used to use HF exclusively) and couldn't find a bag that pH'd over 4.8...which is obviously horrific. OF is too hot to begin
with so combined with quality control issues, at least for me, all mediums are suspect.

Oh, and on water...I've had really good luck with Primo...it's RO water with beneficial minerals added back in afterwards. Gives something for the pH buffer to hold onto unlike pure RO that's so volatile when attempting to buffer.

 

[cc2arms]

When you say "straight coir" you don't mean Coco Loco do you? Because I couldn't get a seedling to NOT yellow in that medium...
Furthermore, I have sworn off all Fox Farms mediums due to quality control and ph issues. I brought my soil meter to the store
(I used to use HF exclusively) and couldn't find a bag that pH'd over 4.8...which is obviously horrific. OF is too hot to begin
with so combined with quality control issues, at least for me, all mediums are suspect.

Oh, and on water...I've had really good luck with Primo...it's RO water with beneficial minerals added back in afterwards. Gives something for the pH buffer to hold onto unlike pure RO that's so volatile when attempting to buffer.

When I say straight coir here's my method/material,,,, I go to local store pick up 1 brick of cheapest coir I place it into 5 gallon bucket w/lid I put approximately 2 gallons of plain rain water/ or RO water (if using tap be careful because heating fluoride concentrates it) I bring the water to a raging boil pour over brick of coir, put the lid on bucket allow it to sit 24hrs Now you have close to field capacity (field capacity=moisture content) pasteurized grow medium, it's really easy way to have a good fairly neutral grow medium ;-) As for water I have found nothing better than good ol Mountain rain water

 

[Waira]

--- cc' --look up coco's CEC online,... coco is unique in a lot of ways, particularly with Ca, Mg uptake, and it's native K and Na content...when using brick stuff, you really have to pretreat it carefully, usually with a Ca-Mg solution to help displace the Na and K,... straight water alone only help so much; the ionic bonding needs the power of those double positive charges on Ca and Mg to force the Na and K (single + charged) outta there,.... if too much Na or K gets left behind, it can cause toxicity issue (largely Na in this case), and the lack of saturation with Ca of the coir particles makes the coco suck it before the plant can! ... how are they seedliong doing, BTW? Did you try germ'ing new ones in an alternative medium?