Deficiency? Toxicity? Help!

[jeansleeperauto]

Problem: Clawing down. Yellowing of older and newer leaves. One plant has burnt tips on new growth

Medium/grow method: Autopots. Soil. Top half is happy frog. Bottom Half is Stonington's Blend

Feed: and supplements used: Nothing yet.

water source: House tap water onl so far @ 180ppm

Strain/age: Day 29 since sprout above soil.2 Night Owl Mangoes n Chem and 2 Mephisto Toofless Alien. Seeds planted directly in autopots

light used: HLG 600 rspec @ 50% dimmed

Climate: 78f - 74RH

Additional info: my pH has been between 5.8-6.2 A couple weeks ago I had a pH swing get up to 6.5


I was told on a different forum that it may be a pH issue. This is my first run with autopots. I used to water around 6.4pH but have been told 5.8-6.2 should be the range for soil autopots. I also thought maybe it's time for a feeding but now I'm worried about the burnt looking tips on new growth(only on one of the plants)

 

[Corum59]

In my opinion your lights are too bright or too close, LED Too Much or Not Enough Light? | Grow Weed Easy this might give you more information.

 

[Bill.de.Cat]

HF is good for 3 to 5 weeks of nutrients before depletion depending on strain.....not sure about the other half of your mix, but I think it's time to start nutes....pH I shoot for is 6 to 6.5 in soil, and that light tips on new growth is normal, not nute burn....

 

[jeansleeperauto]

HF is good for 3 to 5 weeks of nutrients before depletion depending on strain.....not sure about the other half of your mix, but I think it's time to start nutes....pH I shoot for is 6 to 6.5 in soil, and that light tips on new growth is normal, not nute burn....

Stonington's Blend is nutrient rich. I wouldnt think I'd need to feed quite yet based on past grows, but maybe?

Do you grow autopots? I dont know why but everything I read for autopots says 5.8-6.2 and I always thought that was strange. I'll shoot for 6-6.5

Here's a better pic of the burnt new growth. It's definitely brown and crispy looking

 

[Bill.de.Cat]

Ok, see it now...light too close there maybe.....I do auto pots with Happy Frog with extra perlite......about 4 weeks when they start to flower I start in on nutes in the res. Mega Crop 1 part and a pinch of epsom

the 1 in the middle front got sick for some reason so just trying to get her to the finish line.

 

[JAB]

She looks hungry! How far are your lights from top of canopy? Have you fed her any nutes?

 

[FRUMPLEMEIST]

Stonington's Blend is nutrient rich. I wouldnt think I'd need to feed quite yet based on past grows, but maybe?

Do you grow autopots? I dont know why but everything I read for autopots says 5.8-6.2 and I always thought that was strange. I'll shoot for 6-6.5

Here's a better pic of the burnt new growth. It's definitely brown and crispy looking

 

[NORB YIPPLS]

Looking like nutrient lockout,
Maybe due to too much Nitrogen going by the leaf tip drop & the yellowy leafs, maybe something else starting to show as well.
I got my lights on 24/7 and alot closer than that and they not going a deficiency yellow colour.
The rest look different compared to that one in the centre,
Maybe you're in a high Par hotspot.
Maybe @Mañ'O'Green can help ya as im just assuming

 

[Mañ'O'Green]

Looks like the pot is getting out of balance as the available nutrients are being used to depletion. I think they need a good balanced fertigation of Veg nutrients at 600 PPM on the Hanna scale. (not counting your starting water).

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org