Sprouts are dying...

S

sacwchiri

Member
Hi there, i have been havin a little issue with the sprouts for my plants... after the second or third week they just bend over and die D:

At first i thought it was the heat so i moved my light up (Metal-halide lamp), but on my second try this happened again?

i have a coco grow media, in a small closet with a fan inside... :/ dont have a cam but here have a great artist rendition (Paint.Net FTW)
 

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How close is the light?

ItsHard to give and answer without pics, what are the stems like? What rd the leafs doing?, are you feeding them over watering?
 
when i found them they were fine, they weren't dry... the stem was just bent... i have a growbox of 60x60x180 and has 2 openings on the sides to allow air to flow inside, and also 2 fans, one on the top pushing air out and one inside for the plants. also the lamp is 70w, and i dont have thermometer but it was pretty hot initially but after i opened the air intakes on the sides it was about room temperature.... which here has been between 20 to 28 C (68 to 83)
I gave it the nutrients that came with the kit, one for the roots and another which is for vegetative grow... i gave it a half strength from the instruction since i thought they were to young
 
by the looks of it - it was cause you didn't draw it standing up.

could be dampening off.. hard to tell without a real pic... as life like as your interpretation is :)
 
The only thing I think it could be is water? Temps rd fine are you feeding? How often r u watering, pot size?
 
i feed them about once a week about 1.5 lts of water in a pot of 6 lts...
how can i tell if its caused by dampening off? it says (wiki ftw) that its caused by a fungus
 
I think i'll say they cooked, you said it was "pretty hot" and then you vented and it came down. if you thought it was pretty hot, you were probably right. any guess as to how long you had it "pretty hot" in the room?
 
sacwchiri said:
i feed them about once a week about 1.5 lts of water in a pot of 6 lts...
how can i tell if its caused by dampening off? it says (wiki ftw) that its caused by a fungus
Click to expand...

This is usually caused by a fungal disease called "damping off". The cause is infected soil, waterlogged substrate, high humidity...any conditions that promote fungus. The fungus attacks the soft tissue in the stem which withers at the base or midway. The seedling collapses and dies. Another possible cause is that the seedlings died from lack of water or a high salt level in the substrate (which basically has the same effect of drying out the plant). Seedlings have only a small amount of roots and few leaves. They cannot retain much water and quickly dry out. High humidity in the grow space does not compensate for a desiccated substrate. Your soil/rockwool has to be moist enough to sustain healthy roots and provide water to the plant. Photo shows “damping off”.

View attachment 1908322
this is dampening off....see how it looks pinched? Any I've ever seen look like that.
 
the heat for about 4 days :/ but actually the plant looked exactly like the one cowell has there.... so what do i have to do now? they are dead so ill have to replant but what steps would i take for this not to happen? i grow it all indors and nothing has had contact with the outside and the soil is coco grow stuff
 
did you rinse the coco out?
I don't grow pot with coir, but it's very high in salts and needs to be rinsed fairly well I believe.
 
well they guy that sells it told me its a special mix and all you have to do is pour water and let it expand.... and anyway i did wash it cos i didnt really trust him :P
 
That pic looks damn close to the drawing hehe. One thing I would add is that plants this young need next to nothing in terms of nutrients. Be very careful feeding seedlings ;)
 
see... coir comes in compressed blocks.. to rinse it out - makes it expand and it'll turn into like a dust once it's dry.
If you still have to add water to expand it.. it hasn't been rinsed. I remember I watched something on tv had a blurb of info about it - they usually process coir in regions by the sea.. so they can be totally saturated with salt.
That's only one reason for it - I've had it with cuttings in rockwool too.. usually a watering issue at that point.. clean things up and try again is all I did.
 
if i may suggest as well, put your seedling under a CFL and you can get the light much closer without drying it out. use the MH lamp after it developes a few nodes this will help reduce the amount the plant stretches, also keep a fan blowing so it is making the seedling move a little, this will strengthen the stem.

germinte the seed before you plant and get some regular soil. when the seed has a taproot of about 1/4 to 1/2 inch, poke a hole in your soil with a pen cap and place the taproot under the soil and leave the seed just above ground. the root will grow down and the seedling will grow up and shed the shell in a day or 2 and you dont have to worry about watering your medium for a while, also when u water after putting the germed seed into the soil only give it maybe 4-5 tblspoons of water then set the CFL as close as you can without burning. the CFL wont dry the soil out and you shouldnt have to water for 3-4 days (at least could probally go longer)

you want good airflow and dry soil to prevent any fungus or mold from growing on the plant when it is so young.

once you have a few sets of leaves you can go ahead and transplant to a larger container and set up the MH light.
 
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