thin stem, yellow tips

[thecr0w]

Hi all...i'd need some advices about my first aurora indica growing....
it's going to grow up with a thin stem and i'm getting 2 yellow tips of the first two leafs.

Here some photos:
http://imageshack.us/g/203/29012013051.jpg/

- HPS lamp 400watt
- without humidifier
- neutral ph ground with anything else added
- 14 life days
- no air recycling but i'm going to solve this
- i can't tell you its dimensions at the moment

...if you need other informations to help me just ask and i'll answer you as soon as possible. thanks!

 

[s00thsayer]

what potting mix are you using, and if it contains fertilizer pre-mixed, what is the NPK? fyi, lots of people here hate imageshack...you'd probably get more help if you upload the pics to icmag.

 

[thecr0w]

what potting mix are you using, and if it contains fertilizer pre-mixed, what is the NPK? fyi, lots of people here hate imageshack...you'd probably get more help if you upload the pics to icmag.

Sorry for imageshacks, however, i forgot to tell you that i used liquid fertilizer nitrogen in oxblood. maybe it could be the problem because i added it when the plant has only 9 life days.

 

[Humility]

If there is fertilizer in there they still seem to be doing good. Fertilizer seems to do bad things for seedlings unless you're very advanced and know exactly how much you're using and even then I'd imagine people stay under the 100-200 ppm range.


Your seedlings are getting bigger though, they're almost on their third set of leaves so I'd say it's nearing time for a tiny first feeding. If you've already got fertilizer in the soil you need to know how much. Aim for a very low amount, keep water levels at low-medium, the root system isn't large enough to use all the water yet and it will provide other organisms an opportunity to thrive and damage the plant.

It doesn't look that bad. I can't say if it's a deficiency or overfert because you haven't given that information.


You say it's at neutral ph? Like 7? Even if you're in soil that's too high. What medium are you growing in? Looks like either coir or soil or a mix.

 

[thecr0w]

the ground ph is 6 and it's not mixed.. i just added some coffee's laying on the top because i saw 2 insects a day and i read that it can avoid the insects. what can i do to improve its growth?

 

[thecr0w]

 

[thecr0w]

maybe i found the problem:
-humidity: 16%
-temperature: 39.5 C

how can i solve it?

 

[xeno83]

Raise humidity with a humidifier, cool air one not warm, or wet a towel and ring it out hang it up in your box. Also they don't need any nutes right now just PH'd water. Your temps are really really high, anything over 29.4 C is too hot, youll bake your plants unless your adding copious amounts of CO2. Add intake and exhaust fan, mainly exhaust. Is your like in a cool tube or just air cooled. If air you def. need exhaust fan.

 

[thecr0w]

thank you for your advices!! i'll try to solve as you said

 

[MynameStitch]

For feeding it and it's not showing any problems, consider yourself lucky... because when you feed them that young in the soil mixture your plants are normally toast. If you use seed starter mix, do not feed them for the first 2 weeks of there life, because 2 things, plants have cotyldons and the first sets of leaves are always going to fall off, they are like "holding tanks" of food they store to help the plant grow. They fall off reguardless, now the 2nd set will fall off eventually, but not for a bit longer, if they were showing problems, then you would have a problem. I would raise the humidity more it's defiantly too dry, but your plant as off now is not showing problems, don't mess with anything by feeding it, just use water for now it's in the proper pot size and it's not affecting newer growth, the yellowing you see on that set of leaves is normal around this time. So don't muck with it!