New Grower What's wrong with my plant?

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My little indica has been turning the tips of its leaves yellow and curled. It was planted about 6 weeks ago in a small clay pot about 6 inches tall.
Can anyone please advise what I might do to help it?
Thanks for any advice.
Here's a photo of the leaves
 

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Could you provide a little more info on your nutes lights temps ph etc
 
1.What sort of light system are you using?
2.Do you have in-take/out-take fans from your grown-tent?
3.If you have a grow-tent, how many plants are in it?
4.How much are you watering weekly?
5.If you are outdoors, how many hours of direct-sunlight do you get per day?
6.If you are outdoors, what is the average day & night temperature?
7.What sort of medium are you using? (soil, hydro, etc.. if so, what type?)
8.Have you given any nutrients to the plant in any way?

I've got good news though. It looks like the early symptoms of heat-stress - which, luckily in your case, can very very easily be fixed. If you could answer those questions, it would better help myself, and others further assist you.
 
Surfer Joe, looks like the start of nutrient burn. Back off the nutrients a bit!!I would give her a flush with plain old ph"d water, then when she gets a bit dry, give her a feed not too strong, 1/4-1/2 strength.
 
Thanks for all of the advice.
I have a couple of pix of the setup and the plants, and I will try to summarise what I do-
I used a bag of soil compost with vermiculite and perlite added (didn't really know the right proportions) and put them in small clay pots. Planted one seed in each pot, 4 pots total, and all sprouted within a week.
At first, my light was crap and the plants were just growing tall thin stems then I got a bunch of blue and red wavelength cfls and they started to bush out and develop. I now have about a total of 650 watts of cfl lights in the small 80 x80 x 170 cm grow tent. (250 watt red, 125 watt blue, plus 9 30 to 35 watt 6400 and 2700K cfl bulbs in total)
They are in a grow tent with 20/4 light cycle with an extractor fan and filter setup and a small oscillating fan for moving the air and plants and the temp is about 25-30 C when the lights are on and down to about 20 C when the lights are out.

I fed them a fertilizer in water for the vegetating stage at first and after they were flowering, I switched to a fertilizer in the water for blooming/flowers.
I use the ratios for mixing in with the water so that they are fed whenever they get water.
I wait until the soil on the top is dry before soaking them and draining them with the water, and only occasionally do I mist their leaves, sometimes with plain water and sometimes with the fertilizer water (read different opinions on this).
I used miracle grow at first and then switched to a high nitrogen feed. When the buds began to appear, I switched to a high potash feed, but then switched to Canna terra flores and also added some phosphorus plus.
I diluted it in the water and water them when the topsoil is dry down to my first knuckle.
They seem to need watering about every day as the soil seems to dry out quicker in the small pots.

There is a fair variation of leaves in both color and in slight imperfections such as dry tips, yellowing (?) tips, leaves of different shades or colors, and odd little curls on leaf ends on some leaves.
They were planted on sept 12, sprouted about sept 16, and started to show buds about october 15. They are about 12 inches, 9 inches high at the moment, in 5-6 inch pots.

I had a crap ph meter stick that was all wrong. I bought a better meter and calibrated it and discovered that my tap water is about 7.5.
I immediately started using ph down to bring the tap water with the nutrients in it down to 6.5-6.7 and used that.

Then I read that you should only change the ph very gradually- so there's yet another mistake that I made raising my first crop. (This is like raising children- you always mess up the first few until you start to understand the little rug rats, but you always love them. Still, I don't want to love them to death.)

Could the sudden ph change account for any of the leaf problems?
Is there anything I can do to alter their nutrients at this point to help them out? Is the soil so saturated with old nutrients that I should just use water for the time being?

I also see that the largest fan leaves- they have no buds on their stems- tend to turn lighter green while the small leaves around the buds are darker green.
The large fan leaves are covering several bud sites.
Should I be cutting away the large leaves to expose the small leaves and buds to more light, or are the leaves important for the plant's health and photosynthesis?

Thanks for any advice. This seems like a very helpful forum.
 

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Thanks for all of the advice.
I have a couple of pix of the setup and the plants, and I will try to summarise what I do-
I used a bag of soil compost with vermiculite and perlite added (didn't really know the right proportions) and put them in small clay pots. Planted one seed in each pot, 4 pots total, and all sprouted within a week.
At first, my light was crap and the plants were just growing tall thin stems then I got a bunch of blue and red wavelength cfls and they started to bush out and develop. I now have about a total of 650 watts of cfl lights in the small 80 x80 x 170 cm grow tent. (250 watt red, 125 watt blue, plus 9 30 to 35 watt 6400 and 2700K cfl bulbs in total)

Looks like a nice set-up you got there, the two things that jumped out at me were the Miracle Grow and possibly too much of it. that stuff is really hot and will murder plants (I've killed a few things with it)
They are in a grow tent with 20/4 light cycle with an extractor fan and filter setup and a small oscillating fan for moving the air and plants and the temp is about 25-30 C when the lights are on and down to about 20 C when the lights are out.

I fed them a fertilizer in water for the vegetating stage at first and after they were flowering, I switched to a fertilizer in the water for blooming/flowers.
I use the ratios for mixing in with the water so that they are fed whenever they get water.
I wait until the soil on the top is dry before soaking them and draining them with the water, and only occasionally do I mist their leaves, sometimes with plain water and sometimes with the fertilizer water (read different opinions on this).
I used miracle grow at first and then switched to a high nitrogen feed. When the buds began to appear, I switched to a high potash feed, but then switched to Canna terra flores and also added some phosphorus plus.
I diluted it in the water and water them when the topsoil is dry down to my first knuckle.
They seem to need watering about every day as the soil seems to dry out quicker in the small pots.

There is a fair variation of leaves in both color and in slight imperfections such as dry tips, yellowing (?) tips, leaves of different shades or colors, and odd little curls on leaf ends on some leaves.
They were planted on sept 12, sprouted about sept 16, and started to show buds about october 15. They are about 12 inches, 9 inches high at the moment, in 5-6 inch pots.

I had a crap ph meter stick that was all wrong. I bought a better meter and calibrated it and discovered that my tap water is about 7.5.
I immediately started using ph down to bring the tap water with the nutrients in it down to 6.5-6.7 and used that.

Then I read that you should only change the ph very gradually- so there's yet another mistake that I made raising my first crop. (This is like raising children- you always mess up the first few until you start to understand the little rug rats, but you always love them. Still, I don't want to love them to death.)

Could the sudden ph change account for any of the leaf problems?
Is there anything I can do to alter their nutrients at this point to help them out? Is the soil so saturated with old nutrients that I should just use water for the time being?

I also see that the largest fan leaves- they have no buds on their stems- tend to turn lighter green while the small leaves around the buds are darker green.
The large fan leaves are covering several bud sites.
Should I be cutting away the large leaves to expose the small leaves and buds to more light, or are the leaves important for the plant's health and photosynthesis?

Thanks for any advice. This seems like a very helpful forum.

Looks like a nice set-up you have going, the couple things that jump out at me are the Miracle Grow/Nutes and possibly too much of them. That stuff is really hot :hot:, I killed a good variety of stuff with it before I quit using it. If thats all you have available, try feeding every two or three waterings or even less instead of every watering . Also, it may be heat stress related, my cfls get really kind of hot in my 2x2, try raising the ones on the side up just a bit and see if that helps :smokebuds::vibe::peace: - F.J.
 
Hi,

1. I suggest you flush the nutrients as soon as possible. Water 3x the amount of liters your plants are in, so if its in a 1L container, you will water it with 3 liters. (Make sure your water is properly ph'ed and you ph the run-off)
2. Restart your plants on your flowering nutrients, but slowly introduce it. If it says on the bottle to use 10ml per 1L of water (example) you should use 1/4th of the dosage, then after 2-3 weeks ramp it up to 1/2 strength, and finally full strength. You could have shocked the babies with the nutrients, but they look fine.
3. The sudden ph change can have an effect on the plant, but luckily it will recover by itself with time. The ph mistake may cost you some potential yield though.
4. You should not fertilize or feed them with nutrients every time you water. It is recommended to water them with the nutrient diluted solution once a week or twice a week, but never with every watering.
5. If this is an autoflower strain, DO NOT cut of any leafs. Autoflowers need every bit of photosynthesis production they can get. imho.

You have an excellent setup, best of luck! If you have any further questions feel free to ask, this is an excellent forum full of knowledge with everyone willing to help :-)
 
I have learnt recently that if the soil PH is out of whack and more and more nutes are added weekly, by the time you notice your PH is off you are rocking some Hot soil and as soon as the PH is corrected the plant starts to burn up. If I was you id do what briman said and give them a good flush with half strength nutes at the correct Ph.

:peace:
 
Thank you everyone. That is very helpful.
I will flush the plants with ph 6.5 water and then give them the reduced nutes only twice a week.
I will also push the lights back and up a bit.

How far away can cfls be before they are too far away?
Also, how long should it be before I start seeing any difference?
Do affected leaves heal themselves or does the plant need to grow new healthy leaves?

I've been seeing trics on the leaves around the buds for about 5 days now. I have a proper microscope and was wondering if its harmful to cut a tiny bit of leaf off near a bud to look at it under the microscope?
Does it matter where you sample the plant for the trics (at the top or somewhere else)? Do they ripen at different rates on different parts of the plant?
 
Well, I flushed the two plants with about 3 to 4x the volume of the pots.
The plain water was ph 6.6 going in and was 6.8 going out from each pot.
Since so much water was used, and the ph went up to 6.8, it must have been 7 or more in the pots.
The next time I water them, I'll use the diluted nutes water (Canna Terra Flores) and then only feed them every third or fourth watering.
 
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