Yellowing, tips slightly curling up and burnt, slow growth??

Hey guys,

So I finally got a seedling to grow past 2nd internode (on its 6th now). It's 5 weeks old, tiny 6 inch tall, and its leaves starting to yellow from bottom going progressively upwards, and all has burnt tips just like nute burn, even the new growth on the top, but not sure if it is nute burn or some sort of nute deficiency, because yellowing might tell you that the plant needs nitrogen. I been feeding it 18-18-18 chem nutes at half strength since week 3, then at week 4 flushed it with drinking water due to the yellowing and burnt tips. Now at 5 weeks the yellowing spreads upwards at a very alarming rate. The upper half of the stem also has this purplish tint. Not much side branching, but they are there, and small, just not growing as it should. Some tiny leaves at bottom branch also start to yellow after I pruned their yellowed fan leaves at 1st and 2nd internodes (2 one-bladed leaves and 2 three-bladed ones). This is my only plant, and I still have a 50/50 chance of it growing to be a female, but it's fine I'll take my chances as it's keeping boredom at bay.

It's growing in 70% cocopeat, 30% perlite. My past 20 seedlings or so never made it past 2 weeks old, and most wilted and died like pythium damping off, some just yellowed and died out which is weird because i never forget a watering schedule, and never overwater seedlings. This one may have survived because of the intermittent addition of H2O2 or hydrogen peroxide at 1/16 until 1/4 strength of 3% H2O2, sprayed on the leaves and stems, and also into the soil. I never overwater, only water when top 1-2 inches of soil feels and looks dry.

I forgot to mention it is an indoor/outdoor strain, grown indoor in a cardboard box with 2 - 12.5 watt 6500K LED bulbs. Cardboard box lined with aluminum foil, and has a small notebook cooling pad fan placed on the top as exhaust for air ventilation. Temperature is relatively constant at 75-85 F. RH anywhere from 40-60%.

Here's some pictures to see it better graphically.

Any comment is appreciated.

week 4.jpg week 5 overall.jpg week 5 yellow zoom.jpg
 
Last edited:

Zaycor

Well-Known Member
Hey buddy, im no expert but I think your NPK ratio is too high...at this stage you need more nitrogen for example. Also I think there's a little micro-nutes already in cocopeat so I don't think you needed to add more which is perhaps why there are signs of nute burn, water only would have sufficed up to 3wks probably (too late now but something to keep in mind). Also make sure your pH level right, good luck!
 
Thanks Zaycor. Will try to do that. I had a hunch that was what's causing the ailment. Just got a 29-16-16, will try that pretty soon.
 

robro

Active Member
More light,and better nutes perhaps.
Also it sounds like you got a problem with your medium,as you have had problems right from the start without feeding them.
Did you rinse out your cocopeat before use,it can contain loads of salt,even if the seller says its been rinsed.
GL.
 

packetloss314

Well-Known Member
She was way too young for nutes bud. They will survive off cotyledons for a few weeks. They can live out of a base potting soil (nutes free) for 30 days from seed. Get some happy frog soil and when they have a few nodes stick them in that for 30 days no nutes. You will have far better results. Then when u want to flower transplant to some ocean Forrest (both soils are made by fox farm) and just water the whole time. Those 2 soils have all the nutes the plant needs to finish strong.

All comments and pictures posted by the entity known as packetloss314 are completely fiction and at times outright lies. All content was copied from the internet and all statements are from the mind of a lunatic
 

Cpappa27

Well-Known Member
All comments and pictures posted by the entity known as packetloss314 are completely fiction and at times outright lies. All content was copied from the internet and all statements are from the mind of a lunatic
Hahahahaha. I love the disclaimer.
 
Hey Robro and Packetloss,

yeah i did flush the cocopeat before putting the germinated seed into it. I flushed it with drinking water, then flushed it again with 0.75% H2O2, then once again with 0.25% H2O2. I wanted to use organic soil, but couldn't find any brand that seems legit (they're all packed without any list of composition or nutrient contents, so I'm afraid all kinds of fungus in those types of organic soil would straight up kill my seedlings, which happened several times in the past), so i went ahead with cocopeat and perlite. Foxfarm brand is unavailable here in the tropics of Asia.

Anyway, I just got done flushing it again with 3/8 % H2O2 this morning, right after I pruned the third set of true leaves that's gone real yellow.

Here's the pruned leaves, and what remains of a plant with high hopes in it. The last pic is of the common occurence with my seedlings, wilted at the soil line, and when I uprooted and flushed it, the roots doesn't even look rotten at all. It's funny how such a supposedly robust and wild plant is so vulnerable to the slightest deviations of grow conditions. I have many hot pepper seeds (bhut jolokia, carolina reaper, habanero, etc.) grow fine with the same exact setup.
week 5 pruned leaves.jpg week 5 top.jpg week 5 closeup.jpg seedling wilted.jpg
 

robro

Active Member
Remove the tin foil from inside your box,it causes hot spots,might help.
Do you have a ph & ppm meter?
Get some cannabis specific nutes,if you cant get them in Asia try Tomorite for tomatoes.
You will also need cal/mag when using led lighting.
Dont feed until you see improvement in new growth.
GL
 
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