Seedling are dying(first time grower)

RO solved my tap problems. Consistent ph (after adding proper nutes), and no chlorine.

Does your plant have any purple or rose tone in the stem?

You see how the seedlings have that little pinch in the stem? Read up on damp off. It is likely that.

Renfro said:

You see how the seedlings have that little pinch in the stem? Read up on damp off. It is likely that.

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I agree with you. Thats why I asked about the purple on the stem, damping off sucks

The EC of my last coco bricks was well beyond the max reading of EC 3.999mS and it was full of sand. I could separate the sand from it but had to wash all the sea-salt out - these coconuts getting washed a shore and that's far too high Na for Cannabis or most other plants I guess...

I think it's a good idea to amend it with stonemals after washing this is gives it more pH stability.

Here we go again.Plant was fine last night.nutes are the same as the original post.You can see the coco is still wet from last night.

How close are your lights and how powerful are they looks like it could be light stress

Could be low on nitrogen too but it wouldn't make your tips that bad that fast

tylerzigzag9029 said:

Could be low on nitrogen too but it wouldn't make your tips that bad that fast

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Its a cali lightworks 500 its just over 3ft from the plants.
Power Draw: 400w
500 PPFD Distance: 24"
800 PPFD Distance: 18"
Max Current: 3.3A @120v
Coverage Area: Up to 4' x 4'
Heat Output: 1280 BTU

If you are new to growing then maybe you should try growing in soil. I personally think soil is an easier medium for beginners because, with coco, you really need to make sure it doesn’t dry out and you need to feed it constantly. You can get away with little mistakes in soil that you can’t get away with in coco.

My advice is that the medium is less important than your ability to learn and improve. Its obviously not clicking and that is OK imo

I could attempt hydro or a coco grow and likely will at some point. But i think from my own reading and experience that a soil grow is easiest to start and understand because that is how most plants grow in the natural world...i.e. put a seed in soil, it grows on its own with water.

There are indisputable benefits to hydro and coco but they are not required...often considered a more precise and faster grow method and potentially higher yields...but do you need any of that considering where you are?

My advice is put this plan on hold and enjoy a simple bagged soil grow for this go around. Seed in soil with right conditions it grows itself, you just monitor and water for several weeks and get your environment dialed in.

My 2c is starting is the easiest part, and its giving you problems because you are attempting to utilize a more efficient medium instead of learning how the plant grows in a more forgiving medium - soil.

You can easily harvest ounces and even pounds with a good simple soil grow.

Shootersrespect said:

Its a cali lightworks 500 its just over 3ft from the plants.
Power Draw: 400w
500 PPFD Distance: 24"
800 PPFD Distance: 18"
Max Current: 3.3A @120v
Coverage Area: Up to 4' x 4'
Heat Output: 1280 BTU

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It is a high power light but at that distance i cant see it being an issue...do u have a fan on them? It looks to me like stress more than nutes. But are you checking run off ppm and if so you need to make sure it isn't more than 300 above what you are putting in...also i would disagree coco is easier to control than soil but you also have to be more on top of what ppm and ph you put in and what you are getting out anytime i have problems checking run off will usually tell u. And its always a good indicator what your plants are eating if your run off is 400 over what u put in you need to flush i hope that helps you but my advice would be check quality if coco by putting some in pot and run 0 ppm water and check your run off that should tell you if you are going to need to rinse right there. If all else fails switch to general hydroponics and follow that chart and u will have alot Better results.

TreeFarmerCharlie said:

If you are new to growing then maybe you should try growing in soil. I personally think soil is an easier medium for beginners because, with coco, you really need to make sure it doesn’t dry out and you need to feed it constantly. You can get away with little mistakes in soil that you can’t get away with in coco.

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Everything I ever grew in soil died, coco is easy in comparison IMHO.
Mistakes don't hang around in coco either, the next feed you can cure last feeds mistake.
Not to mention over watering, impossible to do in coco, over watering is what kills most soil grows.

And you're still using those net pots, we've already told you they dry out the coco and will kill the plants.
Standard 6" plastic pot, about 20c each. The place for holes is at the bottom of the pot.

Renfro said:

You see how the seedlings have that little pinch in the stem? Read up on damp off. It is likely that.

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Excuse me, so when you're saying "damping off" does this mean the sickness caused by fungus spores, they infect the stem of a very young plant just beneath the soil - where it's more wet than above, then said location will turn darker and shrink due to the infestation, then fall down and be dead.

This is calles "Umfallkrankheit" in my language but I'm afraid I can't find the proper term in english - just dampening off?

Or do you think this can be caused by other reasons as well? Because in this case a bit more wind to the canopy, very very little, just enough to get a tiny exchange right beneath the surface.

sarahJane211 said:

Everything I ever grew in soil died,

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Then it was too sharp, and once it is in soil its next to impossible to get it out. You see clawing young plants that are still 20cm maxheight after 8 weeks and then at some point the plant learned to tolerate the high nutrition and leeches it out and two weeks later the plant is completely yellow hungry for nutes while trying to fatten out bud, then it gets flushed and the completely fucked up plant gets harvested 2 weeks too early XD

You can easily mix soil & coco together, and take measurements, then see how much soil EC is and compare that to your hydro ppm values. Its true it's hard to definitely say when and what is still remaining inside a soild after say, several week, but then you can give nutes according to plant looks and increase/decrease by the feedback you see

I'm a moderately experienced canabis grower.... but I've been growing vegetables and what not for years and starting a plant is starting plant. What you are suffering from is dampening off. 100%. I also think you may be over complicating things. A rockwool cube with rooting hormone may be your best bet for a stronger seedling - or you may want to do some research into sterilizing your coco (I imagine a good rinse with water and peroxide would help). Then amend with a bit of ph'd water + calmag and add perlite for drainage.
Then no nutes until at least the first set of true leaves (not the first two rounded leaves). Until then the seed has everything it needs inside of it to grow.
And a t5 goes a long way for babies. I'm not sure about all the complicated light ratings you've mentioned and I'm sure they're the suggested amount for sprouting, but I've always used a cheap t5 and starting is never a problem for me.
You've mentioned issues growing in multiple mediums so I just recomend going back to basics of sprouting: proper light, clean medium, proper temp, proper humidity. Once you get past the second set of true leaves you should be in the clear!
Happy growing

Kassiopeija said:

Excuse me, so when you're saying "damping off" does this mean the sickness caused by fungus spores, they infect the stem of a very young plant just beneath the soil - where it's more wet than above, then said location will turn darker and shrink due to the infestation, then fall down and be dead.

This is calles "Umfallkrankheit" in my language but I'm afraid I can't find the proper term in english - just dampening off?

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Yes. Damping off.

Damping off is a horticultural disease or condition, caused by several different pathogens that kill or weaken seeds or seedlings before or after they germinate. It is most prevalent in wet and cool conditions. Wikipedia

First time grower should seriously start their growing journey with plain soil...Get that down, learn the ropes, then challenge yourself with more complicated mediums to grow in and fertilizers.

Best of Luck.