Serious problems - still too inexperienced to diagnose

[ActivatedAlmonds52]

My Sour Durban is on week 7 from seed. 250W 16/8h, soil is 13 liters of Canna Terra Professional (black peat, granulated peat moss and perlite, extra nitrogen) in a fabric pot.

It doesn't look too great, I'll tell you what. About a week ago the symptoms started getting apparent and now I feel I should do something serious to salvage the plant. I think the biggest problem is that I COMPLETELY forgot to add N-P-K. I know, I don't understand that myself. I only started adding the following a few days ago:

- Biobizz Bio-Grow (N-P-K 8-2-6) 1mL/1L
- Biobizz Bio-Up (pH+) 0,5mL/1L
- Biobizz CalMag 0,3mL/1L
- Aptus Fulvic Blast (iron, zinc, manganese, copper) 0,3mL/1L (only once a week)

On top of that, another problem could be underwatering. I'm still not sure how much water I should use!

Suppose I water once a day - should there ALWAYS be some runoff? Today I used 1L (definitely more than usual) and there was no runoff after 10 minutes. For some reason I'm still more afraid of overwatering than underwatering.

 

[user 60570]

first thing I would do would be to remove those bad fan leaves

as far as how much water do they need , I go by weight , pick it up , if it’s light , add water

i would also check the Ph and ppm’s going in and coming out

 

[oldfogey8]

Watering to get about 20% run off always worked well for me. 13 liter pots are a bit over 3 gallon if my cakulations are correct. I use 3 gallon felt pots and would water with about a half gallon(2 liters) approx every 3rd day to get a good wet/dry cycle going. I do as big said though. I go by weight. If the pot feels light, I water, if not I let it go another day and recheck. I also use the ‘rule of knuckle’ where I stick my finger in the soil about a knuckle deep. If I still feel moisture, I let them dry for another day and recheck.

 

[Digger]

You are looking at necrosis because you didnt feed it. But looking at a few of your older post, you need to make a few changes, if you dont you'll keep having the same problems. You need to get your environment right and go from there.

 

[ActivatedAlmonds52]

You are looking at necrosis because you didnt feed it. But looking at a few of your older post, you need to make a few changes, if you dont you'll keep having the same problems. You need to get your environment right and go from there.

Yeah, I made the same mistake before - just didn't use NPK at all. I know, I know. I'll definitely keep adding supplements and maybe up the amount of NPK if there's no improvement. I already marked two leaves with numbers so I can compare pictures in the upcoming weeks.

 

[kevinn]

Watering to get about 20% run off always worked well for me. 13 liter pots are a bit over 3 gallon if my cakulations are correct. I use 3 gallon felt pots and would water with about a half gallon(2 liters) approx every 3rd day to get a good wet/dry cycle going. I do as big said though. I go by weight. If the pot feels light, I water, if not I let it go another day and recheck. I also use the ‘rule of knuckle’ where I stick my finger in the soil about a knuckle deep. If I still feel moisture, I let them dry for another day and recheck.

What size plants are you growing in the 3 gal pots. New to tent growing and just trying to figure things out.

 

[Digger]

Hey, supplements won’t fix the issue, don’t add more, she needs more NPK