Cannabis two week old seedling trouble, please help!

[mortaion]

Sure I will, tomorrow I'll take new pictures to see if the yellowing stopped , etc.. Ill take a picture of the soilbag and content if you want?

 

[The Hemp Goddess]

Great, so happy
In the coming days, will the leaves still continue to somewhat get more yellower or brownish or will that stop immediately?

And will the NPK 7-6-6 harm? although it's partly flushed away (I hope, not sure)

I am worried about the soil being too hot--7-6-6 is still pretty hot for seedlings and it is not the right proportion of nutes for cannabis. The soil I use is 0.3-0.1-0.1 just to give you an idea. That translates to 23 times more N and 60 times more P and K in your soil than mine. When soils come pre-nuted like this, they generally have time release nutes that you cannot flush out. The leaves that are damaged will not recover and they will probably continue to deteriorate some. Watch the new growth--that will tell you how things are going. New healthy growth will tell you things are on the right track.

Try and find a source for soil that has no nutrients in it. A town large enough to have at least 2 garden centers should be large enough to find soil without nutes. A lot of organic soils are not nuted and I can't believe that there is no organic soil at the garden stores or seed starting mix (which I have never seen pre-nuted).


Green mojo for your little ones.

 

[mortaion]

Wish you could give some soil !
But anyhow, I really do hope they will do fine, its a big improvement from 14-16-18 to 7-6-6 but it also contains perlite which in mass when combined with the peat reduces the NPK.

I really can't do any better, been at three different gardenshop, it's just unbelievable. I asked one guy if they had soil without nutes, they told me yes over there are coco peat bricks of 5kg, take them!
When I went over there I read the label and it said "100% pure coco peat (+ added nutes NPK 14-16-18) I was like "really?"
Then I asked don't you have a soil that has no nutes? He told me , no all plants need nutes, here this soil with NPK 7-6-6 can never harm a plant unless its a carnivorous but even not carnivorous. So I thought I will take the 7-6-6 and add some perlite..

I'll watch the new growth closely and let you guy's know. Meanwhile, the plants already have their first set of three leaves and theyre developping fast.

 

[Grower13]

It's a MG world.

"Then I asked don't you have a soil that has no nutes? He told me , no all plants need nutes, here this soil with NPK 7-6-6 can never harm a plant unless its a carnivorous but even not carnivorous."


About the way it is around here........... I finally found half way what I needed at a big feed store.

 

[Dr. Green Fang]

hxxp://www.amazon.com/Sunshine-Advanced-Mix-4-1-0/dp/B008PGF9PC


Deliver it directly to your door.... it's just soil. :confused2:

If it is truly that hard to get non-nuted soil, then make the purchase online. No need to worry when buying soil


Good luck on the mix, it will probably work but may fight a bit in the early stages. It's good that you flushed it the best you could... I'd imagine. Again.. I'm a n00b hah :aok:

 

[The Hemp Goddess]

I'm with EllisD. I would order online to my door or drive to the next town to get soil good enough for my plants. The garden guy doesn't know what he is talking about. Seeds planted in a soil that hot are going to have problems. In addition, not all plants like a 7-6-6 ratio. This is far too much N for flowering Cannabis and not enough P.

Grower, even MG makes a seed starting soil with no nutrients in it. I think they also make an organic soil that has no added nutes in it.

Do you have a home improvement store like Home Depot or Lowes anywhere close? I drive 60 miles to get my soil, which I use outdoors for veggies, too. Good soil is critical to a good grow. You may have to drive a ways or bite the bullet and have it shipped to your home. Soil is that important. And remember that you are trying to grow a product here that is quite expensive "retail". It is worth it to go the extra mile to provide the right soil mixture.

 

[Dr. Green Fang]

I'm with EllisD. I would order online to my door or drive to the next town to get soil good enough for my plants.

Exactly.. I mean consider this. Yes, you feed and water your plants, and tend the canopy.. but the soil is the home of your roots. That's the heart and soul of your entire plant! You'd want a nice comfortable place where you could take your shoes off and stretch out right? Not be all crammed with horrible air you can't breath and the smells.. BLEH! You wouldn't like it, and neither does your plant.

It's like a good pair of shoes, yeah?

Do we need some more analogies? hahah :aok:


I think what you have should work, but isn't the optimal way to go about it. Also, you stand less of a chance of saving them. But hey, you've already done it.. may as well see where it goes now. I think it looks better visually, certainly. So hopefully they withstand the initial onslaught of nutes. If not, just do as suggested and get the right home for your girl :aok:


Cheers and greenest of mojo to ya! I sure hope they survive so you don't have to worry so much, BUT.. if they do survive, don't think; "Oh well gee, I can just keep doing this.." .. sure you could, but don't you want the best chances you can get with everything?

 

[mortaion]

26h update with pictures before and after On photo's I said 36h but It's actually 26h , sorry!

As you can see there isn't much difference. I think that no green parts became yellow but only the yellow parts became more brown, I could be wrong I've made some pictures and edited some to show you. On the last two photo's the second leaf looks more brown overall then the other but please not that this is due it's a more detailed picture (you can see the plant hairs) and there's a different background and light intensity. What you guys think?

 

[The Hemp Goddess]

I think that the new growth is looking healthy. The damaged leaves will not heal them selves and you will eventually lose them. They will fall off when they have taken everything useful out of the leaf. The look of the soil is a lot better. However, find a source for soil that is not prenuted, even if you have to drive a ways or order online. Even if the plants can handle the strength of the soil, a 7-6-6 is not a good N-P-K ratio for any phase of growing cannabis.

Generally somewhere on prenuted soil it says how long it feeds for. Is there anything like that on the bags of soil you got?

 

[Kb435]

First off dude flush your plants or transplant to a non crazy high nute soil. they also sell 4ft fluorescent lights and active tubes for under 20$ at walmart which will do you justice in veg while you save to get a real light in your grow like HID or LED they run cooler just a lot more $ than HID.

Oh and yes nute burn. Listen to the people one of the ten people saying it.

 

[mortaion]

@The Hemp Goddess:

By the way: I am preparing those plants for outside. At 6-7weeks, when flowering starts I'll move them outside.
And about the soil; Nowhere within 2hours driving I can find a gardenshop that sell soil with no nutes, I live quite remote.
It's already a lot of work to transplantate them and flush, took me 3hours total. Not that I'm lazy but I just don't got somewhere a day free to be away for 5hours (2 driving + 2 driving + 1 looking).
I hope the soil will do fine for the plants this time while I am aware I don't have the perfect conditions. I'm new and I don't aim for commercial amounts , just a little bit for research would be enough.
I think it said it feeds for 8 weeks, But I will check it right now and correct if wrong
I am happing the situation is looking better, how big do you estimate the chances that it will survive? 50% ? 70 % ? 90 % ? 99%?

@Kb435 Please keep you out of the disscusion, I have already flushed them and transplantated them like mentioned in this forum thread. 4ft FL tubes are not the ideal over here, they are too expensive for the wattage they put out. I use compressed fluorescent lights, (CFL) at this point I got one 125w that puts out close to 10000 lumen (a little bit less). At week 4-5 I'll buy three additional 20w CFL for each plant. At week 7 they will be moved outside. The light is not an issue and is more then enough for cannabis plants and also for yield I am aiming for. I've heard people using just a single 26w for each plant.. So the light is fine

 

[Dr. Green Fang]

I'd give it a good 60-70% ... If I had to guess.

Either way, time will tell. And you can always pop more beans and keep on experimenting at least

 

[mortaion]

Thanks, what do others think about it's chance?
And I am not planning to grow cannabis often, just once in a few years to do experiments (I am a student, medicine).

 

[Hushpuppy]

I think at this point you have saved them from death I think they have better than 60% chance to live. They may struggle a bit until they get stronger but you are going in the right direction now. Marijuana is a very finicky plant to grow(it is only happiest when all the conditions are just right) but it is also very hearty and determined to survive.

TOA told you to get some dolomite lime to add to your soil, that is very important for you at this point because coco coir is more on the acidic side of mediums and it will cause the soil PH to fall too low for the plants to be happy. Read your soil bag to see if it says anything about the soil PH. If it says that it is above 6.0 with the added nutrients, you may be ok, but if it says less than 6.0 then you will need to have some of that lime to "buffer" the soil. Even though you flushed the new soil, the chemicals used in adding the nutrients to it will still be there some, so I would doubt that the flushing will have changed the PH much.

PH is very important to the health of your soil, so what kind of water you use to water them will also have an affect on the PH and soil conditions. You should check your water as soon as you get a chance to see what kinds of chemicals are in it. I know that in many places in Europe the water is high with calcium and some other minerals. This will be important to know so that you can take precautions to keep anymore problems from occuring

 

[mortaion]

The pH is claimed to be 5.0-6.5 of the coco peat soil itself.
But because I added 30% of 7.5pH perlite I think I should be fine? Or does this not compensate?
Our tapwater is pH 6.5-7.1 and normally has a high content in calcium but because we have a "calcium remover machine" (don't know how it's called in english) there's almost no calcium in our water. It's possible that it contains other minerals or anorganic substances, I have no idea but the taste is quite normal and its pleasent to drink.
After flushing the soil three times I checked the water that dripped out from the bottom and it was 6.7
Am I fine or should I still add the lime?

About the photo's in attachment: The first photo look a bit yellow but the new growth is actually very green, it looks somewhat yellow due to light conditions, but its 100% green. Rest isn't

(P.S: Switched lights from 18/6 to 24/0 , I am not capable of respecting exactly 18/6 hours cycle, can't do anything wrong with 24/0, just the electricty bill) Also bought 3x new 20W cfl lights for each plant which will be tomorrow installed hanging 1-1.5" above the plants.

 

[Hushpuppy]

It sounds like your water is good and the PH is just a bit high (for my comfort) at this point, but I wouldn't try to do any adjusting right now. From everything you say here, I think you are good to let them continue without anymore changes for now. But keep in mind that this is a dynamic process. It will constantly change over time. We have to continually monitor the different aspects of the grow to make sure it stays in the happy range. Your temperature and humidity is exactly right. If your water is around 20c then that will be good for the plants, as they don't like water above 24c or below 17c.

As I said before, the system is dynamic and as the plants grow, they will take up the nutrients within the soil, and this will change the chemistry of the soil. You should monitor the run-off once a week and note the changes in PH as that will tell you a little about what is happening and if you need to add a little lime to the soil. I am certain that you will not be able to grow these plant to harvest with just the nutrients that are in the soil now. This soil will probably carry them for 3weeks of good growth before they need more nutrients added. I would suggest that you look at some of the online hydro/grow stores for nutrients that are formulated specifically for marijuana. I think Advanced Nutrients and Hesi are very available for you there and are both solid product lines. I would look at getting a 3 part nutrient brand as that will cover most if not all of your nutrient needs.

Something to know about MJ is that it is a very "high energy" plant like most fruiting plants. The chemicals that it produces are complex and require a lot of light energy. When they are small and in the vegetative phase of growth, they don't need as much but as they get bigger, they will need more and more light as they are steadily producing and storing the chemicals needed for the flowering phase. A good rule for making sure your plants are getting the levels of light that they need to produce good buds is: at a very minimum 3000 lumens of output per square foot of growing space during the veg phase. And at a very minimum, 5000 lumens per square foot for the flowering phase. I can't remember how many square feet are in a square meter at the moment and I don't have my chart. It is easy to maintain the level of lumens when they are small because the growing area can be kept smallbut as they get bigger, they will take up more area so the lighting needs grows quickly. I am not going to make suggestions to you at this moment, this is just for you to have this information.

 

[mortaion]

Thanks a lot!
The light should be fine, a1bout 9000 lumens on 1.8square ft.
When the three additional lights are placed it will be 12500 lumen for 1.8square ft for the moment.
I am prepared to buy additional lights if needed and additional fertilizers online specialised for marijuana but we will talk about that later. Ill post atleast every 3-4day's an update and let you guy's know.

I think I should water them tomorrow because last time watering was Wednesday if I remember, but the soil is still moist.
Should I flush again when watering this time or not anymore?

 

[The Hemp Goddess]

If you are looking at doing this for a while, I would encourage you to check out T5 fluoro tube lights. They have a lot better lumen to watt ratio than CFLs and spread the light better.

I doubt that you are going to be able to keep those plants in 1.8 sq ft for 6-7 weeks--you are talking a space say 12" x 21". The CFLs do not have much penetrating power. They will be fighting for space and more light.

Your soil is important enough so that you should make the trip to get it. Garden stores are not the only places that carry soil is it? Here home improvement stores carry more than most garden shops. And virtually any place that sells plants sells soil.

 

[mortaion]

It isn't a real room, actually.
The 1.8sq ft can change to x sq ft when needed.
I know a lot of people that use a lot less lumens and light then me so I think the light won't be an issue.

12500 lumen for 3 plants is more then enough if theyre online staying till week 7 which is only five weeks to go :icon_smile:

 

[Kb435]

Perlite bro lots for ur soil. They still alive