Why am i plagued with this ??

[Halcyon]

I'm a good gardener, i sow hundreds of seeds every year and they do fine by themselves but my weed will have none of it.
I'm beyond fucking understanding why, it just makes no sense at all.

I get this whatever medium i use, organic/non organic and coco so far.

This one's just a seed planted in canna coco, watered with water/rhizotonic solution, it was in a 4 inch pot but i repotted to try and jolt it out of the problem.

I was leaving it to dry out between waterings, checking the holes under the pot to make sure it's not too damp.

What more can anyone do ?

It's under 4 55w T5's, 27c (80f) under the light (4-5 inch away)


Hard to see here but the tip's purpling.

Classic purple undersides.

It takes them about 3 weeks to do 1 weeks worth of growth, they get to the point where they start fading so they need a feed then they take off and are fine from then onwards.

I can't bare these sluggish starts any longer though. Weeks wasted and i have no idea why.

Thanks.

 

[Herborizer]

Whats the air quality circulation like?

What size pot do you have it in?

Whats the strain?

 

[Sgt.Stedenko]

Lights out temp?

 

[guest121295]

Is your water from the town/city or a well? Is there chlorine or salt in the water from treatment or being near a road?I guarantee that water is your problem, also tons of people have trouble with seedlings in straight coco, I can't do it. I have to use rockwool or soil to start up, always with a 700ppm grow solution if it's hydro, lots of people will say to use nothing but 700 works well, if the medium is soil keep the water somewhere in the mid 6's for a ph and make sure that your water isn't full of rust or who knows what, I can't grow with my own well water because of the salt, I remove it with a decent R/O system.Sorry for the essay, I've just seen this problem before and you can beat it easily.

 

[rambo6372]

Lights out temp?

I had this issue when temps dropped below 65 after lights were off.

 

[Halcyon]

Whats the air quality circulation like?

What size pot do you have it in?

Whats the strain?

Air circ should be ok, 3'x3' cab with 6" clip fan blowing around (not directly on) them. Extraction fan fitted.

They were in 4 inch pots. Strain's Serious AK-47 but i get this all the time. They're always stunted, about 60% develop the purpling undersides.

Lights out temp?

23c(73f) i think, lights out during the day and it's warm here now.

Is your water from the town/city or a well?

It's outta the tap. Starting EC of 0.5.
PH is right where it needs to be (after adjustment) unless the coco's off to begin with.

This is from the same batch of seeds a couple of months back in coco as well.

De-leafed,, .

I bought some root it sponge things so i'm gonna try those out, that doesn't help the few i have now tho.

Thanks everyone !

 

[Yes_I_Am]

what they said, other wise.....

it may be the light man, try one on the windowcill to see if it grows better, then if its lots bigger try a new light.

 

[Halcyon]

Possibly. When i first started growing i used a 250 watter and the seedlings were fine.
I put it down to the organic soil i was using but i quit using that after one batch had these killer seed worms.

I just tried organic again recently and got the purpling.
I can't see why the lights would be bad tho, the T5's are made for this and i've used the 400 with no luck.
I can try one on the windowsil,, .

 

[Halcyon]

Is there chlorine or salt in the water from treatment or being near a road?

Hard to see here but as it's drying out that white shit is salt crystalizing out on the surface. I can taste it without a doubt.

Where the fuck has that come from ?, it's only been watered once with water and rhizo.
I've seen this in soil actually with little stalagmites growing out the soil,, wtf is up with that.

I guess they need flushing.

 

[Maj.Cottonmouth]

It sounds like low temps to me but your post above says it is not so. I would pick up several gallons of distilled or RO water from the store and try popping a new one but only use the store bought water. Maybe there is something in your water supply causing your problem. You could at least eliminate it as a problem this way.

 

[wilbur]

I 'm not an indoor grower ... but purpling of the leaves has two causes that I know of. firstly it may be caused by a phosphate deficiency ... and secondly I 've seen purpling on young plants exposed to cold.

if you have evaporative salts present this may indicate a phosphate deficiency ... not because phosphates are absent from yr mix, but because whatever is causing the salting may also be preventing yr plant from accessing the available phosphate. in short it looks as if there's a nutrient imbalance here.

sorry can't help further ... but do post the solution if you find it.
cheers from Oz.

 

[beta]

.

 

[Halcyon]

Def not low temps, almost summer here.
They responded well to the flush so i think i'm over the worst.

No doubt there was salt but it wasn't right through the coco, runoff EC was only 0.6.
I fed them 0.7 after i flushed so if it was the salt it must have been nasty stuff.

Still waiting to see how the rooting sponge does, i'll try different water next time if it fails.

Thanks everyone !

 

[Big Eggy]

I had the same looking thing with seeds started outside in the cold.. but if your growing inside then can't be that??

i'd start with the water like already mentioned above.. you seem too much of a competent grower for this to be down to the medium, that picture of the buds is mouth watering.

Eggy

 

[Halcyon]

Lows in the cab for the last couple of days are 22.8c and 22.1c, no reason to think there'd be any low spikes before that.
No fan directly on the plants.
Lights are off from 4pm to 10pm.

I love AK man, she is a bit fussy tho. Typical because the weed is stella.

 

[northstate]

I would always flush coco just a little bit and see what the run-off looks like, often its a brown tea color making me think it may have some extra salt in there. Maybe pre charge your coco a bit with bloom nutes and water with a light cal-mag dose in the future and if you did that right now your current purple leaf/hungry plant thread would get better! Hope your conditions improve... NS 5-10% run-off feed every time (lightly)