the very tips of the leaves are turning light green/yellow, why??

My two plants out of 3 are getting yellow/light green tips, I don't know why?? Its the same plants that's in my grow journal, they are under a total of 85w of cfl 6400k at 15 days old with no nutes added yet. Temp is abou 24'C - 26'C and lights are hanging 7cm away from plants! I'm using bottled water and I water them littlebit once a day as my fan dries te soil and I spray them 3 sprays each 3 times a day!

The left and bottom plants of the 3 are getting the green tips and the right top plant is growing perfect and also faster than the others.

What can it be? I don't want to loose them and this is my first grow, would like to make it a success!!
Thanks

what are you growing in did you not add any perlite if not they prob cant breath and why do you have 3 in one pot you need to get thos in there own pot

No its just soil with lots of wood pieces and stones and so on, normal potting soil I have! I will pull them as soon as I know what's male and female! Its a VERY small space so I only have one pot

Read this man. You'll find what you're looking for.

https://www.icmag.com/ic/showthread.php?t=11688

I'd put my money on a pH imbalance or a magnesium deficiency, but I am no expert (yet lol).

Damn I don't like that..what will happen if I don't do anything about the ph?

Your plants will not be able to absorb/process nutrients. Therefore they will not grow well and will not produce the buds we all know and love. This condition is referred to as nutrient lockout.

To cure a pH imbalance, flush your soil with distilled water (2x the capacity of your container. So a 5 gal pot needs 10 gal of water) and get a cheapy pH meter. It's like 15 bucks at Home Depot. I bought a cheapy one though and it broke very easily, so be careful with it or get a high end one. If you check your pH after you flush (you may have to flush more than once) and it's not between 6.0-7.0, you need to amend your soil to get it in the optimal range. Best idea would be to go to a quality gardening store and get an organic soil mix, usually these mixes are pH balanced and light on nutes. Carefully remove your girls with a transplanting tool making sure to keep at least a little bit of a rootball intact, and place them in little peat moss pots (they're real cheap at walmart) with some of that straight organic soil mix. Amend your existing soil with the organic mix you purchased, water the fuck out of it, let it sit for about a week and then then test it again. Be sure to dump water on it everyday, just like you would if there was a plant in it. If you get it in that good range, put your ladies back in and continue. If not, put in more of the organic soil mix until you get it like you want.

Since you have potting mix already, it should be pH balanced; so just amend what you got with that.

If you don't want to do that, just get your girls out of the mix you have and make a new one, or just put them in new containers with a different soil mix (preferably organic).

If you check your pH and it's fine (between 6 and 7) you should check out that link i posed above, it's got everything you want to know about nutrients and diseas problems and how to solve them.

Here's also an awesome mix but you have to let it sit for a while: http://hightimes.com/grow/subcool/5728

That answer explains everything very simple!! Thank you!! The other thing is that I don't get ANY runoff at all, think the fan dries it out before in can run through or the soil is just keeping it in place..I'm thinking of buying perlite and making a new mix with some potting soil I have, just scared that I rip some of the roots when I transplant them?? I have never tried it so I'm not an expert and their roots are everywhere, I can see it because I have a see-through bucket I'm growing in. And I'm scared that if I flush it and the water doesn't run off they will be overwatered and die..

you cant leave them in a pot 2gether what are you gonna do when one is male you cant just chop that one down cuz then the roots will rot and kill the other ones and there gonna get tangled you wont be able to split them apart

All that evergreen bark in there releases tannic acid.

Oky I decided I will move them out of their pot and put each in their one pot, each I about a one gallon pot, what I will do is get 2 more pots, buy some more soil and add perlite to it, I will also then buy another 85watts of cfl and put them in a bigger are, not much bigger area, about 3'x1'x6'. I will be doing this all in the next 2 days, this should help them grow better right?

should help out

you are drowning them. you water every day

I water them everyday because my fan dries the soil extremely quik, within about 9hours the soil is dry about 7cm down, will change things tomorrow when I have time again, how much perlite do I add to 1 gallon pot of soil? And when I put themn back in, do I water a little or do I give them a lot of water?

And when I transplant them, I doubt that I can get all the roots? They are everywhere, what will happen if some of them break off?

hold your horses cowboy.

if youre using potting mix you are in for a bad time. use good quality well composted soil.

miracle gro, scotts, all that shit is nothing but half digested wood chips, bark and twigs sprayed with harsh chemical fertilizers and then dried in a kiln. that stuff will NEVER be anything but rotting wood untill worms and bacteria get it digested. until then its a murder chamber for plants.

theres several good compost and non-compost soils available, fox farms, pro-mix sunshine mix etc... you could even get a sack of perlite ($4) and a 5 kilo brick of coco fiber ($11) and mix them together and do very well in that. as long as you will have to add fertilizers anyhow (and you will, cannabis is a hog for nutrients) you might as well start out with something thats not toxic to plants, and contains only what you intend to add (and doesnt stink, burn or stain your clothes)

for $14 bucks you can make enough soil for 5 5gallon buckets (thats like almost 30 liters) youll not be finding potting mix for a price that cheap anywhere. you dont have to have "pots" you can grow in old butter tubs, mayonaise jars, coffee cans, plastic totes, canvas bags, garbage bins or an old discarded toilet. all your container needs to do is hold soil, drain well and block light from the roots (not rusting is also good)

get those plants into their own containers, but not huge ones, at that size go with a liter size pot at the biggest. you can put them in bigger pots later. choose your soil medium carefully, and your fertilizers should be COMPLETE! miracle grow is cheap but not easy to use, fox farms is really good but pricey, just beware, some of the fancy fertilizers are garbage Humboldt brand fertilizer has ZERO zinc, and your plants need that. dont buy the silly potions or magic elixirs. get a good complete fertilizer that you can afford easily. spend that extra money on more lights.

water only when the pot feels light, then water deeply. a little water should come out the drain holes in the bottom. discard thsi water after youre done watering. dont let it stand about. after that its all about contolling your environment.

Shit I knew buying cheap soil won't help! But at that stage I couldn't really afford anything else, but I cannot find mirracle grow in South Africa, its impossible atleast where I live, we have millions of shops and malls here but all they have is potting soil, there is one random soil that says "organic soil mix" so that should be better than the soil I have now? I am going to buy more light tomorrow and will be getting some perlite and soil along with new "pots", if I plant them in 1l margarine tubs, how long can I wait to transplant them again? And when I transplant I will most propably not get all of the roots, what if some of them break off, will the plants be oky?? I have some hoof n horn organic fertilizer I will add to the end product for the bigger buckets and I have some liquid fert that I can also add.

whoa whoa whoa kimosabe! youre racing past the details. in south africa i bet you got a garden nursery, hydroponics shop, or landscape supply place within a few miles of your house.

it's common conceit that americans assume that if you speak english youre in the USA, but south africa DEFINATELY had gardening shops and botanical supply houses everywhere.

what city you in? google "hydroponics store" "(your city here) south africa" the quotes are important. youll find something unless youre deep in the bush.

stay away from miracle grow potting mixes, all of them. they are rubbish.

miracle grow water soluble fertilizers are hard to work with for new gardeners and can kill a plant fast if you arent careful, but the "Shake-N-Feed" pellets are easy to use. they get a bad rap for being imprecise, inexpensive, and not very trendy, but they work. they come from the same company that makes some of the shittiest most useles potting mixes around, but the fertilizers are good if used properly.

if you use Shake-N-Feed, do it like this:

use a cluster of pellets the size of your thumbnail (just the thumbnail not the whole thumb) ONE TIME for veg, then use a similar amount of Shake-N-Feed rose and flower food ONE TIME for flower and youll be ok. water them less than you think they need, and you will have dope.

theres a million better fertilizers out there if you have the time patience knowledge and money to drop on the right nutrients. theres also a lot of bullshit, magic potions, and riddonkulous retarded garbage out there. use your common sense, listen to local gardeners (you grow tomatoes) especially if youre growing outside. they will know the pests the climate and the soil best.

You see the problem here is that its no so much I cannot find the product, its that the people working at the stores are so fucking stupid! Most of them come from like zimbabwe and can speak like 2 words english and that's it so trying to get information from them is just not worth it. I live in strand which is in cape town, but the closest gardening store to me is about 15km away and at the moment I can't get there.. However today I will go with a friend to see what I can find soil wise, will lok for the soils you said in your previous post, always thought MG was good and easy, guess I was wrong! Plants are looking sick..don't like it! They are propably root bound and suffocating! Need to save them today!! Thanks for the good info man, helps if someone can give you a good answer and point you in the right direction!

Have a loot, I changed it up a bit, could not find everything I wanted, but its much better, the link is a link to my journal with these plants do date

https://www.rollitup.org/grow-journals/536571-stealth-grow-under-cfl.html#post7621928