Diesel ryder, white rhino, arjans haze#3 weird yellowing leaves problem

[Rekos]

Hi,

I would like you to give me a little help about my new grow please
Its the second grow and the plant in the picture is a diesel ryder from rhino seeds.

It is 3 weeks old
It is under a 400W hps and a 6,5 liter pot
The soil is PH 6,5-7 and it has sand on it and other stuff to retain water and air (as the producer advertise this)

The problem is that the leaves at the bottom and the middle start to loose their green colour, get yellow on the edges and than brown and dry

At first I thought it might be because it need nutes and 5 days ago I started to give it N-6 P-3 K6 nutes. It started to grow a little faster but the problem persists

The white rhino and arjans haze are 10 days old and I already can notice that the older leaves started to show the same problem as diesel ryder

Please help

[Rekos]

here are some pics inside the tent
up left - 5 days diesel ryder
up right - 10 days white rhino (old leaves started to loose the green/ not yellow yet)
down left - 10 days arjans haze #3 (old leaves started to loose the green and are a little yellow)
down right the 3 weeks diesel rider (its a she) whici i posted the info im my first post

I must add that the light is at about 18-20 inch high from the biggest plant and i have an exhaust fan and inside blowing fan

[Rusty Trichome]

Hi,The soil is PH 6,5-7 and it has sand on it and other stuff to retain water and air (as the producer advertise this)

The problem is that the leaves at the bottom and the middle start to loose their green colour, get yellow on the edges and than brown and dry
Please help
Would have better results by filling-out the troubleshooting form.
-but-
What "other stuff" to retain water? Are you talking about those water-absorbant crystals? If so, it's not really a good soil ingredient for cannabis.
There appears to be no perlite or anything to help drainage, either. Your soil needs to dry a bit between waterings.

[Rekos]

Would you be so kind to give me some directions where I can find that troubleshooting form?

Soil ingredients: shagum moss peat, common peat, humus by earthworms, clay, river sand

Another question would be if can I start to LST to increase the yeld? The plant has 8 nodes including the first one above the ground

Thank you

[Rusty Trichome]

http://boards.cannabis.com/plant-problems/127058-troubleshooting-form-yay-you-know-you-wanted-one.html

For starters...healthy plants increase yield. I'd wait on the LST thing till you correct what's stressing them.

[Rekos]

OK..I hope I am doing it correctly

S=Answer if you grow traditional soil - YES

E-indoor or outdoor - OUTDOOR

E-soil, soilless, coco, aero, or hydroponic - SOIL

CSL-Soil type/brand - FLORIMO (MADE IN GERMANY)

SCL-Anything you have added to the soil - IT HAS shagum moss peat, common peat, humus by earthworms, clay, river sand

E-Water source - DRINKING WATER FROM STORE

E-Source water -pH PH 7

E-Age of plant- 3 WEEKS

E-Type of fertilizer - N-6 P-3 K-6

E-Lighting source and distance from plant - 400W HPS 20 INCH FROM THE PLANTS

E-Air temperature (both day and night if you are running a dark period) (96 DEGREES DURING LIGHT AND 80 NDEGREES DURING NIGHT)

E-Air % Relative humidity - 50%

E-Lighting schedule - 18/6

E-Type of ventilation your room has - INLINE EXHAUST WITH CARBON FILTER AND A REGULAR FAN INSIDE THE TENT

[stinkyattic]

Ahh you have a couple issues.
First, bring your temps down to NO MORE THAN 85'F day/70'F night.
Your drainage is not enough I fear, but you can adjust your watering schedule for that. Part of the problem is the pots are too big for the plants, which means there are zones of sodden soil in parts of the pots that the roots can't reach, and soil chemistry goes wacky when that happens.
Do you know your runoff pH? I see no lime in the soil ingredients, and fear your soil is too acidic.

In 'basic growing' there is a sticky called the importance of a continuous canopy that you should read, and the thread embedded in it.

[Rekos]

The temperature problem is solved now!
When I bought the soil it said it has a ph between 6,5 and 7
I have a PH meter and after watering it shows a PH of 7 so it is not acidic at all

Can it be fert burn after all? Im affraid that the soil has enought ferts in it and since the plants are so young maybe they receive too much

And belive it or not the 11 days arjans haze#3 has very long roots. I have changed the whole soil in the 3 gallon pot and the roots were almost to the bottom

Do you think that only adding distilled water for a week will help plants consume the nutriends on the soil and recover?

And I have a correction to the previous post. It is an INDOOR grow not outdoor

[stinkyattic]

It COULD be too much fertilizer. But distilled water is not the solution- you still need to give the plants some Calcium from somewhere, and usually it comes from tap water that has dissolved minerals in it. If you use distilled, add CalMag Plus supplement to it.

[Rekos]

Thank you for your fast answers stinkyattic and Rusty Trichome

Here are some pics of today of the diesel ryder 24 days old! She is flowering

The most important question would be : when do I know that the plant needs ferts again?
At this moment I am thinking about letting her about 1 week withouth ferts so it can sonsume the ones in the soil but when to start feeding again than?

The same problem i encounter with the white rhino and arjans haze#3 also
First older leaves loose green , than yellow at the edges than edges gets dry and crusty

Thank you


Thank you

[soobie05]

looks like the plants are getting burned from acidity. I dont think you should lay off the nutes, but just tone them down like maybe 1/4 of what your using now...what are you using by the way.

[Rekos]

Hi,

Want to let you know that I cant belive how fast things changed. The plants are doing fine now and growing like hell

I will still wait a week or so until feeding again so I wont burn them again.

@soobie05 the PH of the soil is 7 at this moment so I dont think they suffer from acidity at all and I use some german nutes NPK 6-3-6 named Substral and I also have Bat Guano for flowering

[Rekos]

Hi again,
As you already know i have 1 arjans haze 3 , 1 white rhino and 2 diesel ryders (harvested already)
Everything went great the white rhino its a 22 inch monster with the main cola of almost 10 inch.
The problem is with the arjans haze which is in a poor condition from what I suspect to be nute burn. (fan leaves yellowing and getting brown and crispy)
What I found weird is the fact that the both plants received the same nutes, strenght and on the same schedule so why the sativa is doing so bad and the indica so great? and after all the rhino is taller with about 7 inch
The only explication I have is that the rhino being a indica strain with larger leaves ans stuff had the strenght to took the nutes and the sativa doesnt!?

I attached some pics if you could give me some advice??
I already flushed the arjans 5 days ago but no change yet..i could say its a bit worse.
Will she improve her condition? She is 7 weeks into flower and according with the strain she has 5 more weeks to go

[Rekos]

any thoughts please? she is getting worse even i flushed 6 days ago. Buds are small and looks like they are not developing at all

[stinkyattic]

Did you flush to adjust the pH? Check flushing sticky. Your soil may have gone sour on ya- they've been in those pots 2 months; I'll bet your runoff is below 6.5!
This is why Hazes irritate me. They take so long to finish that managing the medium becomes a hassle.

[Rekos]

Thats weird cause the PH meter shows a PH of 6,7 and the white rhino is doing great. Can it be just the genetics? (greenhouseseeds)
I flushed with water with PH 6,5 and by the way it is doing even worse now even the smal leaves are going brown and crispy

[Rekos]

ohh and another thing is that the whole main stem is purple