Plants suddenly stopped growing!! help plz

Hey guys so basically my 6 plants are all about 2 weeks old and they suddenly stopped growing. They're in soil, with 2 42w cfls on them about 18-20 hrs/day. They look healthy but in the last few days their cotyledon leaves have started turning yellow on some and they seem to have just kind of stopped growing. The rest of their true leaves all seem healthy but just haven't grown. Any ideas why this could have happened? I haven't changed anything in the setup they just suddenly slowed down.

Also some of my main leaves on my biggest plant are starting to turn yellow. The plants don't have any nutrients, just in a basic soil with vermiculite- does anyone know what the problem could be? should i start giving them nutes now? i feel like its too early for that but something is holding them back

2 weeks in? it is okay to fert them. They are simply running out of steam. Go with a 9-6-3 organic or a 30-20-10 chem fert. Don't over do it and build your nute base as you go.

out.

sounds like what happened to me, are you using mg soil? if so transplant them out of there and you should see noticible new growth after they get over the shock

i'm using a very basic Hyponex potting soil- I have a box of Shultz slow release plant food- 10-6-8, but it isn't a liquid fertilizer like I see a lot of people using its just pellets of minerals that are mixed in with the soil. Should I use this? I don't have any good hardware/gardening stores nearby so its been difficult trying to find fertilizer. Should I look for a soil with nutrients in it or look for a liquid product to mix with the water? really confusd about the fertilizer and the difference between fertilizer and nutrients and plant food- is it all the same?

marlboroman said:

i'm using a very basic Hyponex potting soil- I have a box of Shultz slow release plant food- 10-6-8, but it isn't a liquid fertilizer like I see a lot of people using its just pellets of minerals that are mixed in with the soil. Should I use this? I don't have any good hardware/gardening stores nearby so its been difficult trying to find fertilizer. Should I look for a soil with nutrients in it or look for a liquid product to mix with the water? really confusd about the fertilizer and the difference between fertilizer and nutrients and plant food- is it all the same?

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there is a guy on here (mygirls) who grows big plants just useing miracle grow liquid fertilizer. lowes usually carries a 5-1-1 and 0-10-10 fish emulsion that works nice for weed. i've heard on here that you can buy good fertilizer at rite-aid too. peter's professional 20-20-20 works nice also. i would stay away from slow release pellets. whatever fertilizer you use, start out useing 1/4 the recommended dose, then work your way up.

yes all the same. You want to start with a fert heavy in N for veg grow. keep the ratios at 3-2-1 (like 9-6-3-) in the beginning for veg grow and then switch to 1-2-3 for flower grow. (like 3-6-9) The numbers are less important than the ratio of those numbers.

out.

CrackerJax said:

yes all the same. You want to start with a fert heavy in N for veg grow. keep the ratios at 3-2-1 (like 9-6-3-) in the beginning for veg grow and then switch to 1-2-3 for flower grow. (like 3-6-9) The numbers are less important than the ratio of those numbers.

out.

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oh word. thats good cuz i'm too baked to go to the store... thanks man.

for veg you want a fertilizer high in nitrogen like 5-1-1, and for flowering you want one high in phosphorous like 6-12-6 or 0-10-10

42 watts twice? That's not a light of light for two week old plants. I have done the same setup you have...if that's all the light you have you'll need to keep the light two inches from the plant. You could grow it another week or two as is but you'll get a much fuller and healthier root/plant combo with a step up in lighting. No nutes - or next to no nutes. They wont do much with that light.


spencer

No, with all due respect the last letter is the all important bud growth number. Ever see or use Dr. hornby's big Bud grow fert? It is applied at the beginning of flowerin or in the middle. 0-15-40. 40.... that's the key.

out.

yeah i realize its not a ton of light- i think that might be why they're growing slow. but the growspace is very small, about 10 inches x 20 inches and 2 feet tall. I keep the lights about 2-4 inches from the plants. i probably need one more light in here at least though. I decided to put nutrients in half of the plants at varying amounts so i can kind of gauge where they're at- i'm planning on eventually only having one main female to focus on so some of the plants are mainly being used to test on if any problems come up etc.

make sure you dont get root bound...this can stop growth in its tracks and show some negative signs. what size pots are they in? if they are in small cups or pots you will most likely need to pot up eventually..

Ice

IceIceBaby said:

make sure you dont get root bound...this can stop growth in its tracks and show some negative signs. what size pots are they in? if they are in small cups or pots you will most likely need to pot up eventually..

Ice

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They're in those small peat moss cups- about the size of the plastic cups but a little shorter. I don't have space to get bigger pots until i cut it down to 2-3 plants.
I had to execute one of my plants about a week ago and the root went basically all the way to the bottom of the cup, but it wasn't very wide at all. I've seen pictures of plants and it seemed like i should let them go for a while before transplanting because the roots would kind of curl up and spread out horizontally. Do i need to transplant now? The plants are only about 2-3 inches tall with the second set of true leaves and the next ones just beginning.
I was going to wait until they were bigger and showed sex so i could kill the males and transplant females to larger pots.

CrackerJax said:

No, with all due respect the last letter is the all important bud growth number. Ever see or use Dr. hornby's big Bud grow fert? It is applied at the beginning of flowerin or in the middle. 0-15-40. 40.... that's the key.

out.

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that must be why biobloom works so well

jack tripper said:

that must be why biobloom works so well

Click to expand...

BINGO!!!


out.

Here are some pics from my cell phone- I know they're stretching a little but I've since moved the lights much closer and they've stopped stretching.

no you should be able to stay in those pots for another week or two...roots will most likely start growin out the bottom and you'll kno its time to pot them up. good root growth gives u good yields...

Ice

Ok so the cotyledons are turning completely yellow now as well as some of my true leaves. On my larger plant the 2 big leaves are completely yellow and are turning a brown color at the very tips on the leaves. Is this yellowing natural or is there something wrong? All of the other plants only have yellow cotyledons and the other leaves look fine, but they've all slowed down growth ... any ideas? thanks

They Look healthy to me!

You've got some challenges ahead with the small space, small light, small budget,but
small pots are a GOOD thing. The plants you have in those pots wont get root bound
in another two weeks.
Remember: You DO want to use up all the pot for rooting though: A FULL healthy root system
supports a much heavier plant and buds than a plant with lots of unused soil in
the center of the pot. So keep upgrading your plants as you go until you reach the biggest
pot that your roots can fill. I transplant just three times, but some folks have success
with 4-5 pots.
Dont fuss the small changes you noticed. Stick to your good grow parameters.

Keep them between 60-80 degrees F. If you're going to miss with the watering, miss
on the dry side...don't flood those little containers. Just enough to moisten the bottom center
of the pot.
When?
Learn to feel the weight of the freshly watered pot in your hand,
and the weight of one that has just dried out thoroughly.
Then water just before the plant reaches that dried out stage.

There are visual and physical clues as to watch for as well.

If your leaves droop for a whole day or two after watering - water less.
If you should happen to sneeze at your plant, and every last
grain of soil flies out in a cloud of dust..well...water more .

What kind of seeds are those?

Best,

Spencer