Probable N deficiency?

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Hello all!

The plant is a Vision Seeds Amnesia Haze auto in a 15L airpot with potting soil, fed 2.5ml/l each of Biobizz Grow, Bloom and Topmax, getting about a liter of tap water that (almost always) sat for 24 hours per day. Spends half of the time under an unreflected setup totaling 40W CFL desk lamps, and the other half under nice full sun.
I'm not sure about it's age (about 2 months maybe?), but it's more than a month into flowering. The trichomes don't seem to signal harvest time yet.

It has taken some burning one day when it was too hot outside, some leaves burned and fell later, growth slowed for a few days, but nothing lethal.

Haven't had a single problem until the last few days, where it seems Nitrogen is defficient. The lower leaves are yellowing uniformly, as can be seen in the pic. This just sounds weird to me since the nute dose seems right, and I am afraid to up the Grow additive, in the event N is not defficient.
I should add that some leaves (healthy ones too) have their very tip browned out but this has been like this most of the time (same as in my previous real outdoor grow, which showed no signs of deficiency all the way) and doesn't seem related to the problem.

I'm only able to upload this one pic at the time but will add more in a couple of days.

Thanks a lot for any advice!
 

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Hello!

I am adding leaf, main cola and overall pics, taken with and without flash, and another pic that was taken on may 10, in case it might help determining it's age and whether it might be ready for harvest or not (breeder says 76 days, if that means anything).

I've narrowed it down to these:
1) N defficiency (which I'm not sure about, considering the nutrient doses, which are about 63% of the producer's recommendation)
2) Overwatering (I have upped the water dose lightly as it grew, now getting 1L of water in the early morning, and it's quite hot outside. It's in 11L smartpots)
3) It's just ready early?

Thanks guys!

May 10:
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Today:
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Hey'-- that's some weird color breaking going on there,.. did she do this when a seedling? (might have been a micronute defc. like Fe, Zn...) ...currently, I see the overall paleness, which is not unusual in a plant this age,... tapping into her fans for N, P, etc.,.. that leaf shot with the color burnishing looks like a touch of P defc.,... Biobizz is really mild stuff, and I see defc. issues popping up with this line frequently it seems! She's getting close, but if trichs are not ready, and you have a couple weeks-ish to go, give her an even blend of grow/bloom, to get a little N in there to slake her hunger for it some,...they aren't supposed to finish looking pretty! Make sure you give her a few days prior to projected harvest time to clear out extra nute's,... have you read the When to harvest sticky article yet? New Growers section, right at the top,...
 
Hey'-- that's some weird color breaking going on there,.. did she do this when a seedling? (might have been a micronute defc. like Fe, Zn...) ...currently, I see the overall paleness, which is not unusual in a plant this age,... tapping into her fans for N, P, etc.,.. that leaf shot with the color burnishing looks like a touch of P defc.,... Biobizz is really mild stuff, and I see defc. issues popping up with this line frequently it seems! She's getting close, but if trichs are not ready, and you have a couple weeks-ish to go, give her an even blend of grow/bloom, to get a little N in there to slake her hunger for it some,...they aren't supposed to finish looking pretty! Make sure you give her a few days prior to projected harvest time to clear out extra nute's,... have you read the When to harvest sticky article yet? New Growers section, right at the top,...

Hey Waira, thanks for the reply. I' actually doing this long distance (will only have a short time this evening to take a real look at her) so i havent taken a close look at the trichs (pics arent enough).

I actually am giving her even doses of grow and bloom (2.5ml/l), which are 63% the recommended dose. I was sure that underdoing the manufacturer's doses by this ratio should be good, but maybe biobizz really have a mild product and their reccomendation aren't exaggerated.

If it looks reversible then I'll up the dose by a ml/l each and see how it reacts. If not, I'll harvest even if its a bit early and enjoy the opportunity to test if early harvests really mean a more energetic high at the price of reduced yields.

Thanks again,
Any more opinion are appreciated!
 
:smoker1: ... if you're going to take her in the next week or so, then just stay your course,... longer, give one last stronger dose, and let her cruise over the finish line..! Since you're using organic, mild stuff, no need for a lengthy cleanse period; give her nothing but water, lightly, the last few days before harvest,...:greenthumb:
 
Well, I just found out that the plant is about 68 days old from seed, a bit longer than I thought!
Since temps outside go from 21 to 32 C (70-88 F) and RH peaks at 85%, which are definitely far from ideal, I am guessing it has just accelerated towards the end of it's life.
Since I will only be able to check on her in about a week, I decided to stop nutes and cleanse with plain water, and harvest in a week from now.

PS, I noticed that in the day it smells AMAZING, but at night it smells kinda weird, which has raised some paranoia of mold formation. Any ideas on that?

Here's a nice shot to give you guys an idea and share the delight of just looking at this beauty. Cheers! :cheers:

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:smoking:Hey, what's good bro'? ....sounds a like a solid plan,...she's ripening faster than I thought! Just be very watchful for potential mold, with those high RH's! ..Night temps are high too, right? That can help, as cooler temps+ high RH are more conducive to this,....if possible, keep good air movement going during eve's,... As for the aroma changes, that's normal between day and night,...(mold smells like mold, all the time) ...During the day, the higher temps are volatilizing the terpenes at a greater rate and different proportion vs. at night,... this is when she rebuilds the terp's lost during the day due to weathering,... when you harvest her, take her in the morning, when things are usually at max. levels,....
... Nice job with her mate! :d5: :clapper: She's fattened up well, is full of resins, and in a week, she'll be good and ripe! Have you looked at the trich's to assess color and appearance? I bet she's near to all cloudy now... cloudy = ripe trich's! Amber comes when the THC starts to degrade into CBN, the narco-sleepy cannabinoid,... How much is a personal choice as to buzz preference,... as an Amnesia Haze cross (Sativa dominant), she's likely to have a very up, energetic happy high...:coffee::woohoo1:... cheers Hey! have a nice fat Rep' :slap: for starters!
 
:smoking:Hey, what's good bro'? ....sounds a like a solid plan,...
Hey waira, thanks for encouraging!
I have harvested it two days ago, and it is currently drying.
Here's a pic of the main cola after harvest, my way of saying thaks for the help :thanks:
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