Is This Normal or Am I Doing It Wrong?

U

Uber Newb

Active Member
My seedlings are about 13 days old and now the first set of real leafs are turning yellow and have little brown spots on them. The rest of the leaves look green and happy. They were started in Jiffy Pellets and then moved to a 50% FF Ocean Forest and 50% FF Light Warrior mix.

Do I have something to worry about here?

Thanks and +rep

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Gonna put up the other image when I can get a clear shot.
 
Uber Newb said:
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Click to expand...

When they are this young you have a lot of time and little things like this can make you want to react. Usually this is when things go wrong. If you haven't started a nutrient regimen you can but mix a very light solution based on your fert's seedling suggestions. When those first leaves start to fade and yellow is a good indicator that they are ready for some food.
 
nitrogen is the first thing plants usually need starting after their 3rd week. not familiar with ur ff mix, obviously it is a very lightly nuted soil it would seem since ur leaves r already starting to yellow, which is the indicator that it is time to giving regular N nutes. The cup u have it in, looks like there is very little soil in it as well; I would consider a replant or fill the cup up more with soil...u have a lot of room to move.
 
Thanks for the tips +rep to you both. I had a feeling it was a N problem but didn't want to do anything until I did some more research and got another opinion.

On the other hand, the perfectly round brown spots are still in question. Seems every time I search for this condition I cant find anyone with this problem. Everyone else has had these odd shaped brown spots that are not almost see-through like mine. Any ideas on these?
 
with the spots i would say calcium...
what kind of water you feeding them? R.O? Well water?
whats the ph of the water and the run off water?
 
They are watered with straight tap water with the exception of the first watering which had neem oil in it. (Was trying to be prepared with all the bug stories about Fox Farms) Kinda glad I did as I just opened their home and found two dead fungus gnats a few minutes ago. I spray the leaves with my neem oil mix about once every other day. It dries out rather quick because they are directly inline with the intake fan on the box. I have a feeling its still working however because if I smell the leaves they smell just like neem oil.

I went ahead and feed them with some Buddha Grow and put some potato slices on the tops of the cups. According to another article I read the larva love potato slices and this will give me a chance to see just how many of those critters are in the root mass somewhere. I think the next step will be potting up and placing fine sand on the tops of their new homes. Not so sure I want to trap them in there but I get the idea of doing this to keep them from flying up and breeding.

This really sucks but I guess it could be worse. Feel free to smoke a bowl and send me some good karma!

Thanks RIU, I'll keep you posted.
 
Well if you trap them in there the larvae will just feed on your roots. You got the right idea with neem oil, SM-90 worked very well for me.
I would feed them with SM-90 for a couple weeks before adding the sand. Larger pot's would be best. Maybe heat the FF in a Roasting pan to kill anything before using it then re pot them to 6 or 8 in pots.
 
Solid ideas Cruzer, if I could rep you again I would. Right now I am just making my plan of attack. I really hope I don't see anything on these potato slices in the next 4 to 8 hours but if I do then I think the only sure fire way is to cook some soil, move them to the 5gal smartpots I bought for them, and top them off with sand. I searched for SM-90 and if I am reading this information correctly it is a plant root stimulant? Does this do anything to the larvae itself or just help to rebuild what they destroyed?
 
It will kill them on contact. help the root system, and keep them from coming back.
First time I used it I added it to my res and sprayed the plants down once. They were gone next day. I looked at the roots (hydro grow) and I saw all the little shits but nothin was moving. grow went on fine after that.
 
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Alright, now I am a little lost. The potato slices showed no larva and now both White Widows are showing very distinctive signs of nute burn. The leaves on the one pictured are now 95% all yellow with brown spots (odd shaped, not perfect circles before and brown all the way from center of the spot to the end of the spot) and the very tips are brown and curled under. If my feeding is causing this the only thing I have left to think is that my soil started this.

I wonder though, if the soil was to rich wouldn't they have started burning from seedlings?

For now, I went ahead and flushed WW #2 with lots of water. I want to compare WW #1 (that still has the neuts in its soil) to WW #2 who just got flushed. To top all this shit off, my bublicious shows no signs of problems and seems to have enjoyed the neut watering yesterday. Ugh!

Any pointers?
 
My opinion is your soil has more then enough nutrients for the plants at this size.
Could be the larger the root system the more nutes they intake so you see it burning now and not before. If all the tips were not burnt and the bottom leaf yellowed I would say no problem so I think you are on the right track flushing them. Lay off the nutrients.
 
fungas gnats are easier to kill, apply diatomaceious earth to the topsoil after a watering.. its an organic way to kill the pests that come from the soil... and will not affect the rhizosphere...

keep spraying neem oil too,
i hate the smell of neem tho, its so potent... i only use it once every week or 2.

if you inoculant your soil, you will have to re-inoculant the soil because neem and other products drenched into the soil will hurt the rhizosphere... but avoid this by applying to the foliage...


as far as your feeding, cruze nailed it, unless your running a soilless mix, your soil has enough nutrients for your plants at the time being
keep us posted good luck
 
Alright, so here is the update for this issue. About a week ago I purchased some Roots Organic and dumped the soil into a rubbermaid tote that was left outside. I let it bake in the sun for the entire week and made sure to stir it daily. The temps inside that container had to be at least 120 degrees F if not more. Today, I moved the plants into their final homes (3 gallon smartpots) using the soil that has been sitting in the sun for the last week or so. I also read, today, that fungus gnats love the smell of vinegar, so I put some in a small tupperware container, saran wraped the top, and poked some holes in it. According to the article, once they crawl inside they cant fly out.

After the transplant I watered the new soil with 5ml per gallon of SM-90 per cruziers suggestion. So now, I sit and wait to see what happens. I am, however, very appreciative that I only have fungus gnats and not spider mites or some other horrible infestation.

2011-05-09 21-11-17.789.jpg2011-05-09 21-11-34.268.jpg
 
So far so good. I havent managed to trap one single fungus gnat in the vinegar solution OR EVEN SEE ONE IN MY SETUP! I think the SM-90 nuked the shit outta those little bastards! I'll post back in a few days if anything changes.
 
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