yellowing and dying leaves help!

[weedmeup]

Hi Everyone,

This is our first grow and we are about 75 days in. We have experienced yellowing of the leaves on our Daquri lime autos first from the bottom but has made its way to the ones near the top.
What has most likely caused this?

 

[Shaded_One]

Lack of general feeding imo. Nitrogen def starts on the oldest/lowest leaves and moves its way up the plant. But also looks like you're just suffering general deficiencies all around micro and macro wise.

Seeing some slight taco on the leaf edges as well so you might also just be giving them too puch PPFD. As you increase PPFD the plant naturally will want to eat more so the problem becomes compounded when you a) aren't feeding enough and b) trying to give the plant 2000 PPFD

Need more info - temps, lights, humidity, feed schedules etc.

 

[weedmeup]

Thanks for the reply mate!

Temp:28-30 consistant
Lights: 'Skysaber 720w MK2 PRO 2.9 LED grow lights'. We have maintained a 22/2 photo period.
Humidity: 60% until flowering, them dropped to 40-45%
Each plant received 1.25L every 2/3 days at the same time of day
Every other watering included the recommended amount of 'Advanced Nutrients | Bloom | 1 – 3 – 4 | 4L | PH Perfect Formula'. We only started using this at flowering stage
Soil: CANNA Terra Professional, 50 L

 

[crimsonecho]

so you cut out all grow nutrients after you flipped? they use significant amount of N even in flowering so i dont know why those feeding schedules are like that.

 

[weedmeup]

We didn't actually use any grow nutrients, only nutrients for the flowering stage mate. This is our first grow so have probably missed quite a lot!

 

[crimsonecho]

We didn't actually use any grow nutrients, only nutrients for the flowering stage mate. This is our first grow so have probably missed quite a lot!

yeah probably canna terra got you through the veg phase just fine

 

[CannaDana]

I don't know a lot about autos, but have you considered that this might just be the natural fade that some plants go through when they are nearing the end of their life cycle and start putting every available nutrient into the flowers in hopes of reproducing before death?

 

[weedmeup]

Potentially, however leaves have been yellowing to brown since flowering began - is this normal?

 

[crimsonecho]

those plants have some weeks till being done you should give them some N imo

 

[Observationist]

It looks like those plants are nutrient deficient.

i do not think the buds have fully formed yet either, so possibly not senescence.

1-3-4 is the Flower part, you're missing the other half of the ratio.

all of those yellow leafs are saying nitrogen deficiency.

adding epsomsalt 1tsp/gallon wont hurt either.

 

[weedmeup]

what is the best way to reduce the PH ?