Not sure how to diagnose this

[Nicky Kinicki]

Some of the upper growth has yellowing on the edges as you can see in the pic. Ive been feeding the plant suggested GO CaMg+, neptunes harvest rose and flowering 2-6-4 and .7 ml mammoth p for the last three feedings. Dont know if its deficiency or burn. Plant is a dutch passion frisian dew at 43 days.

Thanks for lookin.

 

[DTOM420]

Possibly a early K defficiency? 2-6-4 is pretty light in K for flowering. Hopefully @Waira will be along soon for the definitive answer.

I don’t think you need Mammoth P that often. Once every couple weeks ought to be plenty. Add some blackstrap molasses to your water and feed that microbe that’s in Mammoth P. It takes time for them to get established and the food (molasses) will help them, and your other microbes immensely. I read somewhere or heard an interview with Mammoth P that it usually takes a couple of weeks for them to really begin having an effect. They’re not going to give an immediate boost and their only job is fascilitating P uptake. I don’t think you have a P deficiency, though.

 

[Nicky Kinicki]

@DTOM420 TY. I have that ill see how a tsp per gallon does. Also have sugaree which is a carb/molas. Only other thing i could come too was too much cal...shrug

 

[Waira]

... hard to say this early in symptoms, it does look more K defc. related than early Zn defc,.... what dosage of the bloom did you use? The irony is K toxicity looks much the same, but that seems less likely than a defc., pending that dilution info.... ratio of P:K is alright,... and K is tough to lock out from off pH, so that's probably not in play here,.... If it's Zn defc. it'll show more clearly soon, on uppers especially as it's an immobile nute so it hits tops first and worst,... I'd look into getting a micronutrient supplement, like Earth Juice Microblast; this is a pretty common defc., and often it's not pH related (locks out starting around 6.8pH) , just not quite enough sometimes in the nutes.... usually because folks tend to dilute the nutes beyond recommended levels, which is fine for NPK, but can end up shorting on secondary and micro's ( this refers to how much is needed by the plant, not how important they are... micro's especially play critical roles even though needed only in very small amounts).... Personally, I add micro's routinely regardless of the rest of the feed regime!

 

[Nicky Kinicki]

... hard to say this early in symptoms, it does look more K defc. related than early Zn defc,.... what dosage of the bloom did you use? The irony is K toxicity looks much the same, but that seems less likely than a defc., pending that dilution info.... ratio of P:K is alright,... and K is tough to lock out from off pH, so that's probably not in play here,.... If it's Zn defc. it'll show more clearly soon, on uppers especially as it's an immobile nute so it hits tops first and worst,... I'd look into getting a micronutrient supplement, like Earth Juice Microblast; this is a pretty common defc., and often it's not pH related (locks out starting around 6.8pH) , just not quite enough sometimes in the nutes.... usually because folks tend to dilute the nutes beyond recommended levels, which is fine for NPK, but can end up shorting on secondary and micro's ( this refers to how much is needed by the plant, not how important they are... micro's especially play critical roles even though needed only in very small amounts).... Personally, I add micro's routinely regardless of the rest of the feed regime!

Ty waira. The plant continues to flower. Im guessing calcium build up might be a thing too so I watered today with sugars and a little recharge only and if it doesnt spruce up after the next feed which ill make sure to feed full strength. ill grab some of the microblast or equiv. Appreciate you guys looking and for your advice.

 

[Nicky Kinicki]

@Waira not lookin any better after a full feed 2-6-2, aminos, CaMg+, tsp molassass, 20ml of sugaree and .6 of mammoth p. Not sure maybe sulfur def?

 

[DTOM420]

Do you know or have a way to check your soil PH? Like an Accurate 8 soil probe? Even testing some runoff might give some indication of whether the soil is seriously out of whack, in terms of pH

What is your medium made of?

I’ll bet your pH is out of whack and it’s the cause of deficiency - a lockout. If that’s the case, I don’t know if you can help the plant much by adding nutrition. If it can’t uptake the nutes, feeding it more is futile.

 

[Nicky Kinicki]

Do you know or have a way to check your soil PH? Like an Accurate 8 soil probe? Even testing some runoff might give some indication of whether the soil is seriously out of whack, in terms of pH

What is your medium made of?

I’ll bet your pH is out of whack and it’s the cause of deficiency - a lockout. If that’s the case, I don’t know if you can help the plant much by adding nutrition. If it can’t uptake the nutes, feeding it more is futile.

Half amended coco and michigan made mix "super soil".

I dont have a soil probe. Anything else i can do to check? Run off phd at 6.4 a week ago

I dont have anything like slf100 but i do have nftg liquid lime ph up and herc harvest. How to fix?

 

[Nicky Kinicki]

Very confused on not ph'ing my feeds. If my mix ends up at 4.5ph im not supposed to correct this? Ph up apparently screws up the soil?

 

[DTOM420]

Very confused on not ph'ing my feeds. If my mix ends up at 4.5ph im not supposed to correct this? Ph up apparently screws up the soil?

Sorry for the long delay in replying. I’m NOT saying not to pH your feeds. What happens sometimes is that your grow medium, whether it’s soil or coco or whatever, can get ‘out of whack’ in terms of a good pH level and/or can suffer from big swings in pH. This can happen for a variety of reasons but the point is that, when it DOES occur, this can lock out nutrient uptake by the plant, no matter how perfectly you pH your feeding solution. If this happens, you can think it’s a particular deficiency and begin feeding more of it with ZERO effect and the plants will continue to exhibit the deficiency or get even worse.

Our resident cannabis doctor, Dr @Waira, will often recommend you check your soil/medium pH when additional feeding doesn’t fix the obvious symptom. Best way is with a Accurate pH probe but runoff is a indicator if you can’t get a probe. I’m not a coco grower but I think most coco growers use 5.5-6.0 as the optimal pH. If that’s the case, maybe your in pot pH is off? It’s not really about what the pH is of your solution - it’s the pH that the roots are exposed to.

I’m sure Waira can get ya sorted!