ladies yellowing

[Ryanz86]

hi everyone, ive come across a slight problem with the grow... Got a bunch of think different, magnum, candy kush, trans Siberian, blucheese an chiesel.. Im on approx day 20, 21.. Using canna range for first time also, coco and all nutrients.. I have begun to notice a slight yellowing of the young ladies, could almost call it a lime green color all over, not just at tips, and growth seems to have slowed.

what i have done in past week is move them around due to circumstanes at plot required me to relocate them for one night, maybe stress?? But i was extremely careful.. I also fed them with rhizo an A & B over the course of a week with no plain water given to them @ 0.5ml an 1-2ml per litre. I never really chek ppm ec or even ph, in soil ive never encountered any problems at this stage. Also ive used canna flush couple days ago to help get rid of the salt build up, i don't want to feed nutrients until they resume to normallity if possible, hope u guys can help or point me in a direction where i can get my ladies lovely and lush green again!

thanks guys!​

 

[blue]

Hi Ryan

The feed you are giving them seems about right - canna grow guide http://www.canna-uk.com/growguide recommends 2.3ml per litre at this stage (although for a photoperiod plant - so half of that should be okay)
If it was nute burn, it would have manifested in the tips of the leaves first.

Without a picture, i would hedge my best guess at you have nute lockout from an overly high PH.

Coco PH range is lower than soil for nute uptake. Without a PH meter, you'll find it difficult to get it right, but at this stage, your ph after nutes should be around 5.7-5.8

It will need to be flushed if it is what i suspect, but you'll have difficulty getting the coco in the right range without a ph pen again

Hope this helps a little

All the best
Blue

 

[Muddy]

Sounds like your plants are hungry. At that age an overall light green color usually indicates a lack of nitrogen. But there could also be a pH issue causing a nutrient lockout. After you flushed them, did you give them any nutrients? When you flush you leach all the nutrients out of the grow medium and a mild nutrient solution should always be given with the last gallon of flush. Flushing a 3 week old plant isn't necessary unless you see signs of a specific issue. Salt buildup won't be a problem that early in the grow. As long as you give enough water that you get about 10% run off, salt buildup shouldn't be an issue at all throughout the grow.

Coco is a true soil less medium, so it's up to you to supply all the plants nutrient requirements. By 3 weeks of age you should already be feeding at least 1/4 strength nutrients, if not 1/2 strength.

Some pictures and pH readings would be helpful.

 

[omnious]

My guess is pH. I'm only using AB of Canna line (6ml/1.5L at 59 days from seed, peak was 8ml) and there is no need to further low the pH after around 4ml/1.5L feed. Before that I had to use pH low, though. pH is 8+ and light feed brought it to 7+ as measured with drop test, no pen.

 

[Ryanz86]

wow, amazing responses from all u guys,, i think its something to do with the ph level. Stil havnt cheked that though.. But looking just now, they do look greener, guess tht canna flush i used helped get rid of watever.. But growth is stil very small!, 22 days and they look like day 14ish... Also noticed some male balls growing at top of plants already!? Only on a couple.. But hey.. Lets see what happens, any reccomendations?? Feed? Let pots dry out? (doesn't look like they need watering..) i hope i don't loose them cause it'll cost me alot to redo.. Also some thanks are already showing a purple streak down the side, this normal at this stage?

thanks guys!

 

[Ryanz86]

few pics, first two show the tallest of the lot but also show the male balls at the top , last pic is a shot of one other showing color, picture is light anyway but can make out the lime green color..

more pics next..

 

[Ryanz86]

more pics, first 2 show a younger one with only water so far, and the next one that's been fed 3times in a row, wen needed.. difference in color is there so I know its not my water source that's causing the problem, next 2 try to show the color and height of the ladies.

im hoping.. that the move I did in the past week with them have stressed them out and stopped growth, from now on im hoping the growth will start up again and ill take it easy on nutes, water schedule until they get fully into the flower period.

ive noticed that the coco isn't drying out as quickly as id thought it would, esp with 4 600w hps at once.. I can check the pH level tomorrow and post up info on tht, but if it is the pH, do u expect it to b high or low? I have Canna-Flush which ive used and seems to have helped.. with this product.. would I stil need to flush with pH'd water to correct the level, as I think the flush just rids of nutrients and doesn't correct ph.. ? I dunno im jus guessin atm lol, any info would help at this stage tho, kinda getting worried

 

[Muddy]

Let's see where your pH is before doing anything further.

Also, when you take pictures, make sure your HPS lights are off. They have a yellow cast and we can't see the true color of the leaves.

 

[Ryanz86]

Let's see where your pH is before doing anything further.

Also, when you take pictures, make sure your HPS lights are off. They have a yellow cast and we can't see the true color of the leaves.

thanks muddy ill hav them up by tomoz!

 

[Ryanz86]

hey muddy hope u read this mate..
been to local hydroponic shop and told them about my problem, they also said to chek my pH level and feed, good enough to help me for a gd half hour or so, great lads!,

but yeh.. Ive only checked my 'fresh' water pH which is higher than i thought sitting at 7.6, have not checked the run-off pH yet but what im goin to do in a couple hours is feed with coco a&b, rhizotonic, cannazyme, a growth enhancer from headmasta, and some cal-mag from plant magic, mix them and set the pH level at the lowest the coco can handle which i think is 5.5? And feed about 800-1l per pot, mostly pourin around the edges..

looking at them today they do seemed to have gone greener and taller, i think the height is heat stress so also thrown some co2 tabs in water in grow room too to help with heat.

wat u think muddy? Taking right steps?