Just the tip... Nute burn??

[Benjidubwise]

Greetings All!

I have 6 Zkittlez Auto from FastBuds on the go at the moment. 2 of them are in 3gal pots & 4 of them are in 2 gal pots.
We’re at day 31/30 (week 5).
In week 3 I noticed very bright tips on the new growth. Since then the issue has come to affect most of the tips of all the plants & is getting worse. Lower growth seems to be less affected.

Looks like nute burn but…

Seeds were started in their final pots in a pint sized plug of Biobizz light & surrounded by House & garden’s Bat Special.

I’m using the following nutes & suppliments:
Biobizz: Grow, Bloom, Heaven, Topmax
Plant magic Root stim
TNC Cal/Mag
Multi mite Kelp extract.

Pre germination the biobizz light plugs were given 1L ph’d & filtered water with 1.5ml plant magic root stim. 1mkl biobizz heaven & 0.5ml biobizz grow & a tea spoon of TNC Mycorr (bactria & fungi)

I’m using such low levels of actual nutrients. We’re at day 30+ and they’ve only had 0.5ml grow (between all 6 plants, not per L or per plant!) since they sprouted. No Bloom has been given yet.
Roots stim was given only for the first 2 weeks
Supplements have been given at very low dosage (0.2ml per Litre)
Cal Mag was given in weeks 2 & 3 at roughly 0.3ml per litre.
TNC Mycorr is given every other feed.

From the fastbudz site:
"All this bud and resin production takes energy, so don't skimp on the nutes. Most autoflower strains are cal/mag hungry, Zkittlez will also perform best when given these vital nutrients."

I feel like I’ve been so gentle with the nutes that nute burn seems ridiculous!

Water is filtered & the solution is ph’d to 6.2 – 6.8 (assuming my pen is correct ). The 2gals are getting about .75L per water and the 3gals are getting 1L

I’m running them under an Invisible Sun 240H with the R-strip retro fit LED in a 70 x 70 Black Orchid tent.

Day time temps are around 27c but get up to 30c & down to 25c. Night time temps can get down as low as 18c but usually sit just above 20c.

Humidity is controlled by the Inkbird and since flower sits around 60%

Whats the crack? Is the BatSpecial so nutrient rich that even without additional nutrients I'm experiencing nute burn or is it a cal/mag issue or is it something else??

Much Love
x

 

[Fitzy]

Wat soil/coco are u using and wat ph are u feeding @

 

[Benjidubwise]

Wat soil/coco are u using and wat ph are u feeding @

Seeds were started in their final pots in a pint sized plug of Biobizz light & surrounded by House & garden’s Bat Special.

Water is filtered & the solution is ph’d to 6.2 – 6.8 (assuming my pen is correct ).

 

[Fitzy]

I wasn't sure wat that bat stuff was but after reading about it I would try not to give it as much p as the guano is supplying to much causing a bit of burn otherwise they look ok have you checked your ph pen to see if it's good. Lmk I will gladly lend way ever I can

 

[Benjidubwise]

I would try not to give it as much p as the guano is supplying to much causing a bit of burn

Thanks for the input @Fitzy.
Yeah... I guess I just thought that by week 5 they'd be ready for a little extra something in their water. Definitely won't be adding any of the biobizz bloom just yet, or maybe not at all at this point as it's mainly phosphorus

Is it worth continuing with the other supplements (bio heaven, topmax, multimite) as they only have negligible NPK values?

 

[Benjidubwise]

@Fitzy
Also, just waiting on a calibration kit to check the ph pen although I reckon it's somewhere in range as I haven't had any other issues thus far.

 

[Fitzy]

I would say skip 1 feeding and see how she does this way the plant has time to use some of these nutes then if she seems happy start off with similar to wat @bushmasterar15 said then you should be on track if you need nething lmk and I would like to see how she finishes either way.