Leaves yellowing/weakening.

[Tayla]

Hi, this is my boyfriends grow, but he has some probs so I wanted to find out what the problem can be. The yellowing started at the lower leaves, not the tips but all around the leave, the leave was also hanging down feeling weak to the touch. All plants (6) have this at different stages.








Strain: Skunk Special (femaleseeds)

Soil: for green plants with small leca - mildly fertelized (store bought)

From seeds. Problem been there from the start.

Age of plant: approx 2 weeks, veg (250w MH, 18 hrs of light)

Pot size: aprox 1L (tecu 7)

No nutes added.

Tap water (not directly from tap - stands 24 hrs for ph-regulation) Water when pot is light to lift.

Temps variate between 25 and 33

Vents in and out of the area + table fan blowing in the direction of the plants tops.

RH: low (20 aprox)



Theorys I have: OK so maybe this plant just doesn't like the nutes in the soil. I use the same soil at my place and the results are very different, I haven't had any discoloration or weaking of the leaves. Maybe this strain is more sensetive? Another theory is that it can be some kind of fungus. It does not look like a n-def and it's not a heat problem IMO.

Any info on this or if you've seen any similar troubles please respond. I've checked Mynamestich's guide without luck.

Hopefully someone can shed some light on this.

Thank you very much!

/Tayla (and her boyfriend )

 

[Guest]

do you know the runoff ph? your temps are a lil on the high side maybe? try and get temp between 20 and 25? humidity too low? try and get the humidy up to like 60%?
it's where i would start i think.

 

[Guest]

Looks like a ph problem to me. Have you checked the ph? What is the NPK of the soil you are using. Burnt tips are often a sign of nute problems.

 

[Tayla]

Thank you very much for your input!

Unfortunatley we are quite poor and improving the setup is going to be hard. Do you know any easy ways to get the RH up? We have a sail-thingy but thats not doing wonders really.. can't afford a humidifier..

Temps are hard to regulate but it's not often more than 30 'C in there.

I'll have to lend my PH-meter to him.. But I'll keep you posted as soon as we've checked ph.

NPK of the soil: 14-7-15
and it's got micros and mg.

Since the soil works very well at my place (see pics in my gallery) I've been careful not to just rule it out as to much nutes - it didn't start at the tips of the leaves and the leaves didn't feel stiff but weak and soft instead. But still it might just be that the strain (Skunk Special) doesn't like nutes. Or maybe more waterings released more nutes to the plants.

Hopefully we'll get to the bottom of this

/t

 

[Guest]

I agree..it looks like ph imbalance- nute lock out. Your using tap water huh, well that could be the prob, sometimes it takes 48 hours before the chloramine evaporates from tap water. I would flush them and give spring water with 1/4 strength nutes until they are back to health. Did u add any lime to your soil mix?

 

[JJScorpio]

Are you sure the soil is 14-7-15? That is very hot. What kind of soil are you using?

 

[Tayla]

Hi again!

The soil we use we baught at a store, we didn't mix anything in at all.

I'm sure about the NPK. I'll get some images of the bag of soil with the info, unfortunatly it's in swedish but I'll try to translate it.

Probably the soil had to much nutes in it for the small ones to like...

Thank you for all the posts and I hope we'll get this thing sorted out

We're going to transplant today - same soil but we'll add some perlite. tomorrow we can check the runoff-ph.





Ok the info on the soil:

55% lowhumidified spagnum(?) peatmoss
30% highhumidified spagnum(?) peatmoss
10% small leca
5% sand

pH: 5.5.-6.5

Added by m2:

Lime: 4 kg
Dolomite lime: 2 kg
NPK 14-7-15: 1,25kg
Micronutritiant: 0,05 kg

On the front it says "Plantagen - "soil for flowering plants" with leca.

/t

 

[Guest]

Ok the info on the soil:

55% lowhumidified spagnum(?) peatmoss
30% highhumidified spagnum(?) peatmoss
10% small leca
5% sand

pH: 5.5.-6.5

Added by m2:

Lime: 4 kg
Dolomite lime: 2 kg
NPK 14-7-15: 1,25kg
Micronutritiant: 0,05 kg

On the front it says "Plantagen - "soil for flowering plants" with leca.

/t

Thats probably your problem: On the front it says "Plantagen - "soil for flowering plants" with leca.
For seedlings or small vegging plants, simple potting soil is all that is needed. Most veggers dont need nutes until around week 2 and even then it may be too early. Not to mention those NPK values are very, very strong for young roots.
It also sounds like you are using a soil-less mix. 85% spagnum peatmoss??? Is that right. Along with sand and leca, which I assume is like perlite. I dont know what soil availability you have where you are but I would advise getting some potting soil and mixing the two together at transplant to get a better balance.

 

[SUNSIMULATOR+]

looks like it needs food

 

[Core]

soil is 2 hot.....they are burning i'm quite shure of it....

had the same problem e few ago....flush them all at full strenght nutes and i mean a REALY good flush...you'l see improvement the next day...

EDITlant is still young so 1 EC @ 500 PPM would be just fine

 

[SUNSIMULATOR+]

soil is 2 hot.....they are burning i'm quite shure of it....

had the same problem e few ago....flush them all at full strenght nutes and i mean a REALY good flush...you'l see improvement the next day...

EDITlant is still young so 1 EC @ 500 PPM would be just fine

did you even look at the post!!! it's not in soil ,, it is in hydroton,, and flushing ,, well in hydroton ,, prolly won't help

 

[Core]

Hi again!

The soil we use we baught at a store, we didn't mix anything in at all.

I'm sure about the NPK. I'll get some images of the bag of soil with the info, unfortunatly it's in swedish but I'll try to translate it.

Probably the soil had to much nutes in it for the small ones to like...

Thank you for all the posts and I hope we'll get this thing sorted out

We're going to transplant today - same soil but we'll add some perlite. tomorrow we can check the runoff-ph.





Ok the info on the soil:

55% lowhumidified spagnum(?) peatmoss
30% highhumidified spagnum(?) peatmoss
10% small leca
5% sand

pH: 5.5.-6.5

Added by m2:

Lime: 4 kg
Dolomite lime: 2 kg
NPK 14-7-15: 1,25kg
Micronutritiant: 0,05 kg

On the front it says "Plantagen - "soil for flowering plants" with leca.

/t

did you even look at the post!!! it's not in soil ,, it is in hydroton,, and flushing ,, well in hydroton ,, prolly won't help

you gonne troll me or what....

i think some 1 other then me needs 2 do the reading....

 

[kov]

In my opinion it's not a problem with the soil, any soil from the shop is fine, even with the seedlings. I used to compare the regular soil for flowering plants with special potting soil and no big differences were visible.

It's the humidity that you have to be concerned about here. You have to raise it with any means possible.

Also that fan you're using is worsening the problem, because vigorous air motion around your plants forces the water to evaporate from leaves at an even faster pace. Get rid of that fan, it's not neccessary at all in the seedling stage.

hope this helps.

rgds, kov

 

[Core]

In my opinion it's not a problem with the soil, any soil from the shop is fine, even with the seedlings. I used to compare the regular soil for flowering plants with special potting soil and no big differences were visible.

It's the humidity that you have to be concerned about here. You have to raise it with any means possible.

Also that fan you're using is worsening the problem, because vigorous air motion around your plants forces the water to evaporate from leaves at an even faster pace. Get rid of that fan, it's not neccessary at all in the seedling stage.

hope this helps.

rgds, kov

you can't be serious...i'm a newbe and even i know you can't plant a seedling in just any soil....
if you give it a flush prior ok then... then your right...
nyhow...every1 his opinion......ey

 

[sagnballs]

i grow the same strain and have always had a problem with yellowing of the leaves the ph has to be right. i like mine at 6.8 in soil humidity at 50-60 in veg and 35-45 in flower hope this helps i love this strain big monster buds and smells soooooooooo good i will send some pics

 

[sagnballs]

ok here u go this is my skunk special and as u can see they yellowed from veg to flower until i bought a ph tester now their alot better but i still get the yellowing time to time all i know is u cant stop the buds from growing did i already say i love this strain

 

[kov]

you can't be serious...i'm a newbe and even i know you can't plant a seedling in just any soil....

I'm dead serious Core, you won't spoil a seedling in any commercially available soil, unless of course it's something really special like rhododendron, rose, orchid soil etc. All the rest, ie "universal" soils are ok. As I said before, I've done the comparisons.

rgds, kov

 

[Tayla]

Hi!

Thank you for your posts, even those with errors in them are useful to some extent (lol-ing at least ;D)

any hoooow...

HOW do I raise humidity? At night the RH is 95% at day below 25%... I don't really understand how to raise it during the day.

I know we can get the pH under control - doing measuremeants tomorrow..

What cheap home-stuff can you use to lower/raise pH?

Thanks a bunch, keep posting

/t

 

[Brother_Monk]

You can put a big bowl of water in there with them...that will raise your RH. But I'm convinced too that your soil is way too hot for them younguns. I've had every form of burn, lockout, scorch, deficiency there is. Your plants are burning and starting to get lockout from too much nutes.

Peace
BM

 

[Guest]

a bowl of water, a couple of hand towels soaked and hung above your light or misting the walls with a spray bottle. the towels and the misting would probably have to done 2 or 3 times a cycle.
that soil may have been a better choice for this strain for a repot after a couple of weeks of veg. you can try and flush and dilute it with lots of water(like 3 times the container size) . i'd flush till the outflow runs clear. wait 3 days, if they improve, give a 1/2 recommended dose of fert. i'd preflush the new mix before repotting. just be careful with the ferts because that mixl is plenty ferted.
to ph adjust your feed water, you can use vinegar or lemon juice for lowering ph. to raise ph i use hydrated lime, but be careful , you need a very small amount. you'll without a doubt need a calibrated ph pen to that tho
good luck