Seelings pH lockout, I belive

[CtHaddock]

How long has this problem been going on? about 1 week
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents) no
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...) Hand watered coco
What STRAIN are you growing? MNS SSH, Serius KM, Sensi JH
What was the establishing technique? (Were the seed or clone?) seed
What is the age of your plants? 2-3 weeks
How long have they been in there mixture they are in now?(coco,soiless etc..) about 1½ weeks
How tall are the plants? 5-10cm (2-4")
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? seedling i guess
What Technique are you using? Hand watered coco
What substrate/medium are you using?(Hydroton, RockWool etc.) coco
What is the Water temperature? no res
What color are your roots? White? Brown? Are your roots slimy? not visible
What Nutrient's are you using?(If growing soiless) Canna Coco A&B, MgSO4, Cannazym
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful* Canna coco: 1ml/l, MgSO4: 1,5g/100L (15mg/l), Cannazym: 2,5ml/l
How often are you feeding? (If using soiless) When pots are light
How often are you giving nutrients? (If using soiless) In all water
If flowering, when did you switch over to using Bloom nutrients? no
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect) I don't understand.
What is the TDS/EC/PPM you are using? no meter
What is the pH of the "Tank"? no res
Are you sure your calibration is correct on your equiptment?
When was your last watering? An hour ago maybe 2
What is your water temps? no res
When was your last feeding change? (ie. grow-bloom-micro-additional) I started the seedling with Canna aqua vega in hope of faster growth, soon they started to show def and i switched to Canna coco, within 2-3 days.
How often do you clean your system: example: Flush out water replace with clean water and nutrients? I just did this
What size bulb are you using? 2x105W CFL
What is the distance to the canopy? 5cm (2")
What is your RH Factor(Relative Humidity)? 40%
What is the canopy temperature? 23-24C, 73-74F
What is the Day/Night Temp? (Include flucutaion range) no fluctuation 24h light
What is the current Air Flow? (cfm etc.) none
Tell us about your ventilation, intake exhaust and when its running and not running ? Once in a while I walk around in the room.
Is the fan blowing directly at plants? no fan
Is your water HARD or SOFT? 2,7-3,3 °dH soft Mg: 1,5ppm Ca: 18ppm raising Mg to 4,5ppm with MgSO4
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Tap
Are you using water from a water softener? no
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

 

[CtHaddock]

I have tried foilar feeding with no success. Flushed 3 times the pot size just now.

 

[pokerfish]

Several things displaying on the plants, but what got me from the get go was your using the nutes without an ec meter. You listed ppms for your tap water... how did you get those? Do you have a pH meter? How did you come to nute levels/dosage... based on the label? What is the MgSO4 intended to address?

Canna makes a great product, though never used these nutes myself- many, many attest to it, so good choice. You do not need additional Mg, Ca, or S when using the Canna Coco nutes, so drop the supplement. Though Canna can be run at f/s (unlike most every other brand), it still needs to be cut from f/s, esp at this stage. Don't know their recom dose, so 4ml/gal = ?

No pH/ec meter while in hydro is like trying to piss up a rope... doesn't usually work out too well. Without relevant data here, no way to tell. But best guess is you are not low on nute values, but very high. pH is probably out of whack (very, very acidic). The combo equates to nute lockout, not deficiency. Really, really... get those meters. Very difficult for you to correct without. Best.

 

[CtHaddock]

Several things displaying on the plants, but what got me from the get go was your using the nutes without an ec meter. You listed ppms for your tap water... how did you get those? Do you have a pH meter? How did you come to nute levels/dosage... based on the label? What is the MgSO4 intended to address?

I got the ppms from the water analyze the water company gives out. I use liquid pH test, havent had the need to test often as my coco usually never let me have anything but 5.8. 1ml/l canna coco comes from a reply in my grow thread (see sig). 2.5ml/l cannazym is from the bottle. 15mg MgSO4 is from a nutrient calculation excel sheet, to get the proportions 1:4 Mg:Ca that comes from the vegetative aquarium community. It have solved problems with twisted leafs in the past.

Canna makes a great product, though never used these nutes myself- many, many attest to it, so good choice. You do not need additional Mg, Ca, or S when using the Canna Coco nutes, so drop the supplement. Though Canna can be run at f/s (unlike most every other brand), it still needs to be cut from f/s, esp at this stage. Don't know their recom dose, so 4ml/gal = ?

What is f/s? 4ml/gal is 0.95ml/l.

No pH/ec meter while in hydro is like trying to piss up a rope... doesn't usually work out too well. Without relevant data here, no way to tell. But best guess is you are not low on nute values, but very high. pH is probably out of whack (very, very acidic). The combo equates to nute lockout, not deficiency. Really, really... get those meters. Very difficult for you to correct without. Best.

I have grown without EC meter for 6 times now. I have always only needed to look at the plants, start at low levels, very light green to yellow = more nutes, burn = too much. But I haven't grown much sativa and from what I read they are more sensitive to nute levels.? I will do some pH testing now. Thanks!

 

[CtHaddock]

The solution I water with and flushed with is pH 6.3 and the runoff is pH 5.8 after the flush. Don't know what it was before the flush.

 

[CtHaddock]

They look worse today so maybe the flush didn't help.

Can it be nute burn?

 

[ChaosCatalunya]

I would ditch the MgSO4 and Cannazym, I have grown plants using just Canna Coco A+B for 8 months with nothing else, Cannazym is great at eating old roots, but you dont have any, you are giving them 2.5 x more of this than their food .....

Just starting out seedlings now with just coco A+B @ 1ml/L, no problems at all, make it and use it, drain to waste.

Good luck Captain

 

[CtHaddock]

I will flush just with canna coco then. Thanks!

Next time I'll use seedling soil and transplant them into coco, done this most of the time with great success.

 

[arvid b]

CtHaddock, maybe water your plants less, too- I think your Coco looks a little too wet

After you flush them let them dry out some and see if this corrects the cupping leaves.

Wishing You Success

*EDIT* Great choice of strains by the way *EDIT*

 

[CtHaddock]

When I removed the cannazym in the flush solution the plants recovered. Thanks everyone!

 

[RockyMountainHi]

can't feed babies a Double Bacon Whopper and a malt.

or a prime rib and baked potato

plants are like babies