curling and browning leaves on young jock horrors (pics inside)

[dtoker]

hi all, ill get straight down to the buisness. im hoping someone can advise me on these and hopefully stop them getting any worse! thanks for any help in advance!





What STRAIN are you growing? jock horror

What was the establishing technique? seed

What is the age of your plants? 2 weeks veg

What Technique are you using? soil

What substrate/medium are you using? perlite?

What is the Nutrient temperature? not sure

What Nutrient's are you using? biocanna

What is the pH of the "Tank" nute mix measures at about 6.2

Are you sure your calibration is correct on your equiptment? 75% sure

When was your last watering? 1 day before the pics

When was your last feeding change? n/a

What size bulb are you using? 2 x 20w cfl
What is the distance to the canopy? 1-1/2"
What is your RH Factor? ?

What is the canopy temperature? 80ish
What is the Day/Night Temp? day 80 night 75

What is the current Air Flow? about 33 cfm

Is the fan blowing directly at plants? smaller fan is

Is your water HARD or SOFT? hard

Has plant been recently pruned, cloned off of or pinched? no

Have any pest chemicals been used? If so, What and When? no

Are plant's infected with pest's? no


----- im not sure if thats the right chart but should do? i havent fed them yet by the way, only tap water left out for a day then ph'ed down to about 6-6.3. i water every 2 days or so when the cups are bone dry and light.

 

[Snype]

What are you using for soil and are there any ferts in it?

 

[dtoker]

hi mate, im using something called john innes no.1, here is the ingredients that ive found on the net...

for pricking out or potting-up young seedlings or rooted cuttings. This composts has a carefully balanced nutrient content to suit most young plants.

7 Loam
3 Peat
2 Sand
For each cubic metre of mix, add

0.6kg ground limestone
1.2kg hoof and horn meal
1.2kg superphosphate
0.6kg potassium sulphate

its mixed down with about 50% perlite

 

[dtoker]

any ideas?

 

[wishbone420]

might help pulled off internet ph might be little low?do u test runoff water of each cup.





When growing marijuana in soil the pH of the soil should be between 6.5 and 7.0. When growing in containers, a single pH reading for each container is recommended. d

 

[dtoker]

hmmmm do u think mate? what is the ideal ph then? i havent been testing run off but i will do later on and let you know



---just seen your edit cheers mate. someone on here said ph of 5.7-6.5 as im using a soil-less mix aparently? cheers

 

[Daemon]

5.7 sounds low for soil-less. I go with 6.0-6.3 for straight ProMix.

 

[dtoker]

thats wot i thought, i allways make sure its about 6 minimum, 6.4 max?

 

[m@rg]

i use the john innes range, no 2 and 3 , love it in a mix of perlite and a little lime
but i keep my ph at 6.55 and they all do fine


your ph is slightly too low get a run off ph also

 

[dtoker]

ok cheers dont u find that the john innes no.2 etc is a bit hot? hopefully its down to the ph then ill keep it at 6.5 cheers
ill check the run off aswel but might have to leave it a couple of days as ive re-potted them tonight.


edit-- wow man just been checking your grow threads, fair play nice lookin plants bro!! cant believe the dark leaves on that orange diesel thing, crazy man! how was the smoke on that?

 

[Evgeni_Malkin]

something that can prolong dieing leafs is spraying (fioler feeeding) them with water. Leafs can die for many reasons when in such small containers, something that has helped me when I have this problem with young plants is tranplanting them into bigger pots.