Common mistakes for first-time coco growers?

PhenoMenal

PhenoMenal

Well-Known Member
i'm trying out coco for the first time, but having some problems ..

I've always used hydroton clay pebbles as my medium with happy success, but I now have the chance to try coco.

... but with my first grow of two plants (diff strains), ive had a lot of LEAVES YELLOWING, from the older/bottom leaves, but the plants - the upper, newer healthier leaves that is - are now a very 'light/lime green' rather than 'healthy green' ... the yellowing on the lower leaves started somewhere around the time i switched them to flowering (just to give an idea of plant age, but the switch to 12/12 obv has nothing to do with the yellowing)

pH ... flushing ... cal/mag ... etc ... I'm not sure where I've gone wrong, as ive always kept the pH between 6.0 and 6.3, i've always added cal/mag, though i only flushed once

Have i saturated the coco with too much nutrient?
or are they demanding MORE nutrients!?
or is it a FLUSHING issue!?
or... !?!?

I was also wondering, what are the common mistakes, and what might i be doing wrong?
 
Last edited:
Wrrrrl

Wrrrrl

Member
PhenoMenal said:
i'm trying out coco for the first time, but having some problems ..

I've always used hydroton clay pebbles as my medium with happy success, but I now have the chance to try coco.

... but with my first grow of two plants (diff strains), ive had a lot of LEAVES YELLOWING, from the older/bottom leaves, but the plants - the upper, newer healthier leaves that is - are now a very 'light/lime green' rather than 'healthy green' ... the yellowing on the lower leaves started somewhere around the time i switched them to flowering (just to give an idea of plant age, but the switch to 12/12 obv has nothing to do with the yellowing)

pH ... flushing ... cal/mag ... etc ... I'm not sure where I've gone wrong, as ive always kept the pH between 6.0 and 6.3, i've always added cal/mag, though i only flushed once

Have i saturated the coco with too much nutrient?
or are they demanding MORE nutrients!?
or is it a FLUSHING issue!?
or... !?!?

I was also wondering, what are the common mistakes, and what might i be doing wrong?
Click to expand...
Hello, I will tell you right off that I don't have time to go back and forth in a thread over a few days time or more, so I'll help you get help, lol.
You need to tell us your feeding/watering regime. Type of nutes.
Straight coco or coco/perlite mix?
Keeping it moist or letting it dry out?
PH should be between 5.8 and 6.0 so there's a slight difference in optimal range there. (6.0 to 6.3 you said you keep it at is slightly high)
Why did you flush and was it plain water or at least .8 ec? ( plain water is rarely good for coco)
Main common mistake is treating it like soil and letting it dry out between watering.
I'm sure others will come along and give you more advice.
Best of luck!! EDIT: oh yeah, and some pics would be helpful. :)
 
Last edited:
6ixtynin9

6ixtynin9

Well-Known Member
PhenoMenal said:
i'm trying out coco for the first time, but having some problems ..

I've always used hydroton clay pebbles as my medium with happy success, but I now have the chance to try coco.

... but with my first grow of two plants (diff strains), ive had a lot of LEAVES YELLOWING, from the older/bottom leaves, but the plants - the upper, newer healthier leaves that is - are now a very 'light/lime green' rather than 'healthy green' ... the yellowing on the lower leaves started somewhere around the time i switched them to flowering (just to give an idea of plant age, but the switch to 12/12 obv has nothing to do with the yellowing)

pH ... flushing ... cal/mag ... etc ... I'm not sure where I've gone wrong, as ive always kept the pH between 6.0 and 6.3, i've always added cal/mag, though i only flushed once

Have i saturated the coco with too much nutrient?
or are they demanding MORE nutrients!?
or is it a FLUSHING issue!?
or... !?!?

I was also wondering, what are the common mistakes, and what might i be doing wrong?
Click to expand...
An even paling (lime green) of the leaves usually means lack of nitrogen. They are hungry. Feed more / add a higher dose of high nitrogen nutes. Chlorosis (yellowing) on leaves with green veins usually mean magnesium deficiency. Foliar feed or root drence with an Epsom salt solution or CalMag. Ph in coco can vary from 5.5 - 6.0, with 5.8 being ideal. Never let coco dry out. Do so can shoot the pH way up and lockout can occur. Never keep coco constantly saturated nor soping wet. Just keep it moist. Pictures and more details would have helped.
 
T

Tim1987

Well-Known Member
Ill say your run off ph and ec are most important in coco.
I run 100% straight coco.
The symptoms you describe are the most common. Even in an experienced growers garden. Its doing the "coco dance" :bigjoint:
I believe i explained some experiences ive had with coco, that you are experiencing right now.
Youre welcome to snoop my profile to see. Otherwise i think the posts are in the marijuana problems section.
I always check my runoff. Always. Never fail. What comes out the bottoms reading has to be close to whats going in, or youll lockout. No way around it.
I do believe the posts will help you.
Take it easy. Good luck
Tim
 
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