Seedling Problem, Yellowing and Twisting of Leaves

[SweetIndica2]

Alright, i recently started a new grow under my 1000w. The plants i am having problems with are my sensi stars and blockheads, as well as most of the other plants. The sensi stars and blockheads are about 16-17 days into veg. Heres the problems i'm having with them:

- Growth is very slow, as you can tell by the pics below they should be alot bigger for their age.

- The leaves are making weird shapes and twisting, some are even curling slightly up, some are curling slightly down.

-Drooping. Most of the plants are drooping except for the recently planted seedlings.


Heres the info as far as watering and growroom:

Watering: They have only been watered twice. Last time they were watered was about 8 days ago, the soil still isn't that dry.

Temps: I have been leaving the light on most of the day, 24/0. The temps get about 58-59 at the lowest. When the lights are on, the temp doesn't get below 62 or so usually, average for when the light is on is about 65-68 degrees f. I know this is fairly cold, but i am going to be grabbing a space heater in a few days.

Soil Mix: Mixture is Scott's potting soil w/ 30% perlite. I have never had problems with this soil, although it does hold moisuture for awhile especially in cold temps so this could be the problem.

Nutes: No nutes have been started yet, i know that yellow in plants this young can't be a nute def, especially since they've been looking like this for over 4-5 days now.

Humidity: 25-40%. It's usually around 30% on average though.

Light: Plants are under my 1000w HPS. Light is about 22-24 inches away.

Here are the pics:

 

[krustytheclown]

No discoloration of the leaves: that's good!

Drooping and twisting of the leaves: that's bad.

Showing development of the second set of leaves: that's good!

Stunted growth: that's bad.

I am guessing your temperature is the biggest problem you are having right now. IIRC, temps in the 70's is best. My theory is that the water and soil are colder than the 62 degrees even when the lights are on, which may be shocking the roots and hampering growth. This is an even worse problem when the light isn't on and temps drop down into the 50's.

Remember, you are measuring the temperature of the air, but the temperature of the soil and the water in the soil are going to be cooler. By how much, I don't know.

My advice to you: Get that space heater in there! Raise the ambient temperature in the area to at least 70 degrees when the light is on, 85 tops. When the light is off, I assume you don't want ambient temps below 65.

 

[T.doT.Toker]

What strain is it?

 

[GR8shoeBaDizzle]

sensi stars and blockheads

 

[powdergreen]

toooo much light ..... plants that small only need flouro's for now .

 

[Guest]

Raise your light to about 3 to 4 feet for now. and get that space heater! 1000 Watter is way to intense for them right now. so either raise it or use flouro's

 

[MynameStitch]

another grow using hps and plants being stunted when they are this young, like haze stated fluros and compact fluros are your best bet now, hps is improper spectrum for these young plants they need proper spectrum whedre with bigger plants it won't affect them no where near as badly.

Since they are in big pots for there size, how much are you watering. You do not want to water to where water comes out the bottom if so you will cuse your plant to get damping off or root rot due to water sitting in the soil so long, you just want to water enough to make around the area of the plant wet and nothing else they will tell you if they are not getting enough water, but it looks like they may be getting a little too much too. They are fine in terms of green but get the lights up and get a heater like haze stated!

Cold temps= slow stunted growth
Droopiness can be caused by to much water to high of temps and either cold temps other things can cause it too though

But, when they are this young they are affected by things more than what they would be when they are bigger. Cold soil and cold temps= not going to grow well
and they are supossed to be bigger than the size they are now, so get some heat in there and if I were you I would switch to compact fluros, hps will cause slow growth in this stages because of improper spectrum use.

Blue is what you want to use right now,m you can mix them but the blue will help them grow and flourish more at this stage than using hps, and you are wasting electricity, the plants can only take in as much light as the size of there leaves

temps need to be around 75 and 70 at night

 

[IAmTheHydro]

might be overwatering also

 

[SweetIndica2]

mynamesstich- Well, i've had many grows started out with an HPS. I always use my hps for veg, i don't have money to buy another light at the moment. I don't think the spectrum makes that big of a difference, a little more stretch is all i have noticed when using an HPS for veg. Plenty of people use HPS's for vegging. I do agree with you on everything else though. I definately think the temps have alot to do with it, i'm actually going to home depot or lowes tomorrow to grab a heater. I haven't watered them in about 8 days, i'm going to wait until they are COMPLETELY dry before watering.

I'll give further updates, thanks for the help everyone!

 

[Guest]

At least raise the light between 3-4 feet bro, The intensity of that 1k is too much for em right now.

 

[SweetIndica2]

I already did when you posted earlier. It's at like 38 inches right now.

 

[VanGrow]

does anyone else think the humidity is to low???????

40-60% would be alot better....i have had a whole room look like that from LOW humidity.....plant cant transpire....doesnt take up any water....sits in the soggy mess and drowns /suffocates...........a slow and tortured death...

 

[420guy]

I agree that the soil mixture probably is a little too chilly...and a humidity level of 40-60% would be better like VanGrow stated...Stitch is CORRECT when stating that plants that young don't like the high powered h.i.d. lighting...sure,people have vegged with hps, but that's not what they like...seriously, try an experiment with some small floros and you'll see an amazing difference in new growth and growth rate over the monster hps...a small floro set-up might cost ya $25-30 american cash...well worth the money spent...stay safe

 

[Blackvelvet]

Start weakly feeding the seedlings when first true leaves form. Temperatures colder than 68 f is no good.

 

[budrezin]

yeah but what is the runoff ph?

 

[SweetIndica2]

vangrow- I know PLENTY of people, especially on here who grow in less humid conditions and have no problems. I have done over 6 grows in this house, some with even lower humidity and they were fine.

420guy- i have used plenty of fluros, i have never noticed a growth increase when using fluros over an hps. Do you think in nature that plants have an option as far as lighting? no. As long as i keep the light far enough away, i'm sure i will be fine. I started them under this light, and they were growing fine up until a few days ago. Also, please show me a fluro that is around $20-$30 that will be able to veg 16-20 plants under it? Now where talking T5's, i don't have that kinda cash sitting around ATM. I'm sure i will be fine with this light. Fluro's just don't have the kinda power a 1000w does.

Blackvelvet- gee really? I never knew when to start ferts

budrezin- The ph is correct, i know it's not a ph problem. I always measure the water going into the plants, and the runoff.

Alright, well thanks for the people who actually helped. *Waits to get 1000 more responses from noobs suggesting shitty ideas that won't help me one bit*

 

[SweetIndica2]

I just checked them for the first time since yesterday and they are already looking better, i'm sure since it's fairly warm out today that had a part to do with it. The temps are around 68-70 in there right now, i'm going out to grab the heater in about an hour or two. I put a box fan on the plants to strengthen them and possibly help dry out the soil a little faster, i can't run my 265 dayton until i grab the heater atleast.

But back to the plants, all of the leaves that were showing slight yellowing are now green and most of the plants are already showing alot of new growth...they've shown more growth since yesterday as they have in the past several days...

 

[Guest]

Ok man check this: your humidty is to low.
Your temps are to cold(I told you get a heater)
Your plants look overwatered.
Your way to intense light has also played into the stunting of your plants.

I never heard a guy insult people who are trying to help him. Check that attitude man. Your stubborness has led you to the infirmary in the first place. I dont see no bad advice offered to you by the "noobs" And since your posting in here with a simply problem it looks that your the noob.

 

[Guest]

Ok man check this: your humidty is to low.
Your temps are to cold(I told you get a heater)
Your plants look overwatered.
Your way to intense light has also played into the stunting of your plants.

I never heard a guy insult people who are trying to help him. Check that attitude man. Your stubborness has led you to the infirmary in the first place. I dont see no bad advice offered to you by the "noobs" And since your posting in here with a simply problem it looks that your the noob.

I thought the same thing when he didn't take your's or stitches advice.

GCG

 

[bonecarver_OG]

to grow seedlings with a 1000W light is just over-kill - the roots dont have the capacity to get what they need for all that light.

as many others - i prefeer fluoros at this stage of veg. its actually quicker. and helps the roots to develop

peace