Jack herer seedling looking ill =(

[sophanox]

Hey guys, here is my jack herer seedling that is looking pretty ill.

It's been in a 10 gallon dwc for about 4 days now, with 250ppm floranova grow nutes and superthrive. I originally thought the yellowing was due to an N def so I gave it it's first feed two days ago but it hasn't recovered, only degraded =(

Rez temps are mid to high 70's and air temps are high 70's to mid 80's

Ph varies between 5.5-6.5

The other two plants in the rez are doing fine, albeit not growing much =S

As you can see the tips of the leaves are starting to turn grey and completely die which is pretty strange =S

Any help would be very much appreciated!

*Edit* The pics dont really do it justice, both leaves are drooping considerably, the part of the leaf closest to the stem is still dark green, but it gets yellower towards the tip and the tip has turned a dead brown/grey colour

Thanks a lot =)

 

[KaleoXxX]

seedlings and nutes dont mix

the seed has what the baby plant needs to grow for a good 2 weeks atleast

your the 3rd person this morning, in like an hour, that ive told not to use any nutes on a seedling. just light and water and thats it

 

[sophanox]

seedlings and nutes dont mix

the seed has what the baby plant needs to grow for a good 2 weeks atleast

your the 3rd person this morning, in like an hour, that ive told not to use any nutes on a seedling. just light and water and thats it

thanks for the fast reply mate, but all plants were definite showing an N def.

I've also been following roseman's advice from the bubbleponics forums n he recommends giving the first feed when the first set of leaves appear

 

[JonnyBtreed]

thanks for the fast reply mate, but all plants were definite showing an N def.

I've also been following roseman's advice from the bubbleponics forums n he recommends giving the first feed when the first set of leaves appear

Those plants were NOT showing an N deficiency. Probably a heat and overwatering problem. You shouldn't need nutes until 3-4 sets of leaves are showing, not including the cotyledons.

 

[JonnyBtreed]

They are in rockwool right?

 

[JonnyBtreed]

Originally Posted by Roseman
PPM for Hanna Chart PPM


Seedlings, Early Sprouts 100 to 250

Early Vegging 300 to 400

Full Vegetation 450 to 700

Early Blooming 750 to 950

Full Mature Blooms 1000 to 1600

when Rose said that he meant just the water shouldn't be any higher than 250 ppm... Meaning you can use tap water and it should provide all the nutrients and micronutrients that your seedlings need.

You really shouldn't add anything until you see about 3-4 sets of true leaves.

 

[sophanox]

oh right ok, i must have misinterpreted what rose said

yep they are in rockwool, i coulda sworn it was an N def. I understand basic plant biology, but how can the plant sustain itself for that long on just water alone? Surely the energy stored in the cotelydons has been used up by the first/second set of leaves?

So would you recommend a just emptying the rez and leaving plain water in there?

Thanks very much

 

[KaleoXxX]

yes plain water untill the cotelydons fall off, you have 4 sets of leafs, or atleast 2-4 weeks

there is no way a seedling needed nitrogen, man

 

[JonnyBtreed]

Well actually a plant can sustain itself for over a month hydroponically in tap water (not distilled because there is absolutely nothing in distilled) before it even starts to show any sign of deficiency. Even in distilled water the plant will throw 6-8 SETS of leaves before it starts to starve.
I would certainly just use tap or spring water until the plant starts to perk up. Is the water in the dwc touching the bottom of the net cup or are you hand watering it?

 

[sophanox]

Ah right, I never knew that - thanks very much johnny and kaleo

The water is touching the bottom of the rockwool cube atm in the netcup

So i'll just replace the rez with some fresh water then?

 

[itsgrowinglikeaweed]

Well actually a plant can sustain itself for over a month hydroponically in tap water (not distilled because there is absolutely nothing in distilled) before it even starts to show any sign of deficiency. Even in distilled water the plant will throw 6-8 SETS of leaves before it starts to starve.
I would certainly just use tap or spring water until the plant starts to perk up. Is the water in the dwc touching the bottom of the net cup or are you hand watering it?

This is something everyone needs to know. Almost everyone overfeeds their plants big time. Its no wonder everyone is so flush happy around here LOL. Good post!

 

[JonnyBtreed]

Ah right, I never knew that - thanks very much johnny and kaleo

The water is touching the bottom of the rockwool cube atm in the netcup

So i'll just replace the rez with some fresh water then?

Then thats your problem. The water can't be touching the plant needs time to dry out and absorb oxygen. Its an overwatering problem. Had a feeling. You need to hand water for a week or two until your plants roots hang down into the water. and you want at least a couple inches of air in between the bottom of the net cup and the water. What kind of air are you running in the water? Like how much

 

[potcasso]

i see drooping leaves looks like over watering..u should keep the rock wool above the water and hand water until the roots come out n touch the water. i had lost 2 set of seedlings due to over watering.

 

[sophanox]

Then thats your problem. The water can't be touching the plant needs time to dry out and absorb oxygen. Its an overwatering problem. Had a feeling. You need to hand water for a week or two until your plants roots hang down into the water. and you want at least a couple inches of air in between the bottom of the net cup and the water. What kind of air are you running in the water? Like how much

Ahhh right, that explains it - i'm using a 2 gallon per minute pump through four air stones. I also have two micro pumps in the tank as well. There's plenty of bubbles so I think the water is ok.

So I should hand water the seedlings till I can see the roots poking out the bottom the netcups, then I can start the dwc?

Thanks everyone so much for the help

 

[itsgrowinglikeaweed]

I grow in soil, but I clone in a bubbler bowl I made with an airstone. I use a solution of 1 part H2O2 and 2 parts water. I got that from Ed Rosenthal's book. Someone correct me if i am wrong but would this not also be beneficial for new seedlings growing in hydro?
Here is the excerpt >
"Hydrogen peroxide is essentially water with an oxygen atom attached to each molecule. Its chemical formula is H2O2. The second oxygen atom is ready to jump from the peroxide to other molecules and to oxidize them. It readily jumps onto mold spores and bacteria and destroys them by burning them up. Peroxide is sold in different strengths. Indoor garden shops sometimes sell 10% peroxide, but drug stores usually sell the 3% strength.
One part of 3% hydrogen peroxide can be combined with two parts water, or one part 10% solution is combined with nine parts water, to make a 1% solution. This solution should be used for cuttings for the first week. Nutrient and amendments can be added to this mix. It can also be used in the sprayer if you mist the plants. It is a sterilizing agent, so your cuttings are much less likely to suffer infection."

It just seems to me that it would be nearly impossible to overwater a seedling in such an oxygen rich environment.

 

[JonnyBtreed]

I grow in soil, but I clone in a bubbler bowl I made with an airstone. I use a solution of 1 part H2O2 and 2 parts water. I got that from Ed Rosenthal's book. Someone correct me if i am wrong but would this not also be beneficial for new seedlings growing in hydro?
Here is the excerpt >
"Hydrogen peroxide is essentially water with an oxygen atom attached to each molecule. Its chemical formula is H2O2. The second oxygen atom is ready to jump from the peroxide to other molecules and to oxidize them. It readily jumps onto mold spores and bacteria and destroys them by burning them up. Peroxide is sold in different strengths. Indoor garden shops sometimes sell 10% peroxide, but drug stores usually sell the 3% strength.
One part of 3% hydrogen peroxide can be combined with two parts water, or one part 10% solution is combined with nine parts water, to make a 1% solution. This solution should be used for cuttings for the first week. Nutrient and amendments can be added to this mix. It can also be used in the sprayer if you mist the plants. It is a sterilizing agent, so your cuttings are much less likely to suffer infection."

It just seems to me that it would be nearly impossible to overwater a seedling in such an oxygen rich environment.

right on as long as further down the line your not using organic nutes or supplements as it kills the beneficial bacteria in the water. but for clones or seedlings I do the same thing.

 

[JonnyBtreed]

Ahhh right, that explains it - i'm using a 2 gallon per minute pump through four air stones. I also have two micro pumps in the tank as well. There's plenty of bubbles so I think the water is ok.

So I should hand water the seedlings till I can see the roots poking out the bottom the netcups, then I can start the dwc?

Thanks everyone so much for the help

wait until the roots hang down about 3-4 inches below the net cups. Then you have your 2 inch bufferzone I was talking about between the water and net cups. Trust me when the roots start, they come down real fast. like an inch or two a day. it'll take no time at all. But remember, since you have been overwatering them they are going to be in shock and might take a little time to grow like they should. probably about a week or so more at least.

 

[sophanox]

wait until the roots hang down about 3-4 inches below the net cups. Then you have your 2 inch bufferzone I was talking about between the water and net cups. Trust me when the roots start, they come down real fast. like an inch or two a day. it'll take no time at all. But remember, since you have been overwatering them they are going to be in shock and might take a little time to grow like they should. probably about a week or so more at least.

mate you're a total legend thanks so much for your help, you've basically saved my grow =)

 

[JonnyBtreed]

No problem brother, that's why I'm here. Good luck with your grow

 

[PotHead3]

No problem brother, that's why I'm here. Good luck with your grow

nice johnny you also cleared up lots of stuff for me too