[SnucksOG]

Hey all this is my first grow. Im growing 2x Lemon Walker from DNA and 2x Blue Cheese from Barneys seeds under a 315w CMH light in Fox Farm Ocean Forest soil with no admendments. They popped the dirt on Jan 12th, 16 days ago. They have looked good and stayed short. I transplanted to their final home in 5 gallon smart pots 4 days ago on the 24th. I topped one today since it looked better then the rest and was praying for the lights. I have been feeding them nothing but RO water and Some seaweed extract in between waterings. Today when I fed i added about 2ml of CalMag+, 1.5ml Seaweed extract and 1.75ish ml of Bio Marine from the General Organics line per gallon. I've been having A lot of trouble with low humidity in my tent since the beginning so I have been misting a few times A day with ro water. So there's the history... Now...A few days ago they started showing yellowing on the tips of the lower leaves, some more there others pretty much right after transplant. I'm just worrying and I may need some help. So here are some pics and please help this wary noobs mind.

This post shows the two Lemon walkers notice the yellowing on lower leaves the first two are of the the the first LW yellowing on the first set of sherated leaves and also at the tip of the first 3 finger leaf. On the second one the baby leaf (first leaves that pop from seed is completely yellow and the first and second set of sherated leaves are both yellowing. Has a little bit of Browning too. Not much..

[SnucksOG]

This post is the Blue cheese.

[Emmay_Dee]

If it yellows from the bottom up with little burn it could just use a nice shot of fish emulsion for quick ammonium. Its too early to supplement calcium. If you do that its gonna wack up magnesium. The only thing saving you is the seaweed and it may have a high ph associated with it. The fish will blend with that seaweed then nitrogen can bind in the soil with its proper cation. If you dump more calcium in there it will be the first to bind and magnesium will have no anions, in turn "locking it out"

Dont feed cal and mag at same time. Its gonna put a high demand on nitrogen. Calcium toxicity is different than Nitrogen because it becomes unstable at low ph and binds and block other nutrients. And after it binds it rarely releases its anion and doesnt leech from soil.

[SnucksOG]

Originally Posted by Emmay_Dee

If it yellows from the bottom up with little burn it could just use a nice shot of fish emulsion for quick ammonium. Its too early to supplement calcium. If you do that its gonna wack up magnesium. The only thing saving you is the seaweed and it may have a high ph associated with it. The fish will blend with that seaweed then nitrogen can bind in the soil with its proper cation. If you dump more calcium in there it will be the first to bind and magnesium will have no anions, in turn "locking it out"

Dont feed cal and mag at same time. Its gonna put a high demand on nitrogen. Calcium toxicity is different than Nitrogen because it becomes unstable at low ph and binds and block other nutrients. And after it binds it rarely releases its anion and doesnt leech from soil.

How do I not feed cal and mag at same time if they are both in same bottle? Lol but did I just hurt the plants by feeding calmag to early? I'm using RO water, I thought calmag is really helpful when using such since ro water is striped of it.

So what is your opinion i should do?

[Emmay_Dee]

Calcium is an immobile nutrient so unless its showing deficiency never feed it. Its also most abundant in soil over others. Cal mags for people that grow hydro not soil. Use epsom salts or Molasses if you feel you must feed.

More nitrogen or less calcium
great looking beautys so keep it up

~Always~

[FinalBoss]

I run cal mag plus in mine. Same light. Ffof.
It's NOT just for hydro.. that's just bad advice

[FinalBoss]

I run cal mag plus in mine. Same light. Ffof.
It's NOT just for hydro.. in fact. I run 5ml per gallon every feeding. No side effects at all. Prolly one of the more safer things to add imo.
True it's used more on hydro and led set ups but to say its not for soil is false

[Lester Beans]

Originally Posted by Emmay_Dee

Calcium is an immobile nutrient so unless its showing deficiency never feed it. Its also most abundant in soil over others. Cal mags for people that grow hydro not soil. Use epsom salts or Molasses if you feel you must feed.

More nitrogen or less calcium
great looking beautys so keep it up

~Always~

Sorry I disagree. How is the plant going to get calcium if the OP is using RO water?

You should be feeding the plant a balanced veg nutrient at this point. Def add the cal/mag. And make sure to pH the solution to 6.5-6.8.