Early Veg leaf discolouration - light edges.

Tms · Sep 20, 2024

Hi all, happy Friday.

My young one has just been uppotted from starter cup to 6.5L last Sunday.

Since then she has been watered once, 1.2L with about 15-20% runoff. Water PH before going in was 6.32. No other additives/feed. Just pure water.

Soil: biobizz all-mix.

Not sure if normal but I don’t recall seeing this kind of discolouration in my prior grows.

What do you guys think?

Tms · Sep 20, 2024

Extra info:
Light: lumatek ATS300W PRO @ 25% - 34inch from canopy.
PPFD (measured using the Photone app): 256
Humidity: 65% Rh
Temp: 25.5c

Tms · Sep 20, 2024

Tms said:
Extra info:
Light: lumatek ATS300W PRO @ 25% - 34inch from canopy.
PPFD (measured using the Photone app): 256
Humidity: 65% Rh
Temp: 25.5c

VPD: 0.76

2Water · Sep 20, 2024

What are you feeding?

Justlovetogrow · Sep 20, 2024

Magnesium deficiency from the led I’d say often I’m very wrong though

Tms · Sep 20, 2024

2Water said:
What are you feeding?

No feed as of yet, was just uppotted into biobizz all-mix Sunday. This lady has only ever had water.

Tms · Sep 20, 2024

Justlovetogrow said:
Magnesium deficiency from the led I’d say often I’m very wrong though

I haven’t given any cal-mag in my waterings. Think she could do with some cal-mag?

RGWD0202 · Sep 20, 2024

The runoff is likely taking the nutrients out of your medium. Try not to have much runoff until you start giving nutrients. Looks like it’s hungry. Looks like nitrogen and/or magnesium deficiency.

Bdubs · Sep 20, 2024

Recheck your lights PPFD map at 16”. You are very low on light according to the map. 1100ppfd at 100% @ 16”. 25% at 34” puts you at about 200ppfd or less and if going 18/6 that’s 12.6 DLI. Check me I just did some quick looking, I may be looking at the wrong light or map.

Bdubs · Sep 20, 2024

I guess I am saying, what is your Lux or PPFD at right now?

Tms · Sep 20, 2024

Bdubs said:
I guess I am saying, what is your Lux or PPFD at right now?

I forgot to mention in the post so added the ppfd reading as a reply to this post. PPFD measured in at 256 using the Photone app.

RGWD0202 · Sep 20, 2024

Tms said:
I forgot to mention in the post so added the ppfd reading as a reply to this post. PPFD measured in at 256 using the Photone app.

When using the app, do you use a diffuser?

Tms · Sep 20, 2024

Bdubs said:
I guess I am saying, what is your Lux or PPFD at right now?

Tms · Sep 20, 2024

RGWD0202 said:
When using the app, do you use a diffuser?

Yes, just posted the screenshot of the ppfd reading from app.

Tms · Sep 20, 2024

Bdubs · Sep 20, 2024

What’s your light schedule? 16/8 or 18/6? Either way that’s pretty low. Slowly increase your ppfd until you are at 35-40 DLI, by then you should be nearing end of veg and you’ll trigger flower and start to vamp up the ppfd again. By week 5-6 you’ll start reducing that ppfd again until harvest.

Tms · Sep 20, 2024

Bdubs said:
What’s your light schedule? 16/8 or 18/6? Either way that’s pretty low. Slowly increase your ppfd until you are at 35-40 DLI, by then you should be nearing end of veg and you’ll trigger flower and start to vamp up the ppfd again. By week 5-6 you’ll start reducing that ppfd again until harvest.

18/6. Alright thank you, I plan to lower my light till around 450-500 ppfd then again up the ppfd during flower. Never really measured DLI but will measure and try to keep within these ranges if that is best.

RGWD0202 · Sep 20, 2024

I grow in a living soil, I don’t know much about the bio bizz line other than seems to be really popular right now. But maybe give a light feeding. Try to avoid runoff early on if running bottled nutrients. Try to avoid runoff all together if using organics

Tms · Sep 20, 2024

RGWD0202 said:
I grow in a living soil, I don’t know much about the bio bizz line other than seems to be really popular right now. But maybe give a light feeding. Try to avoid runoff early on if running bottled nutrients. Try to avoid runoff all together if using organics

Alright thank you. Next water I’ll give a 1/4 or 1/2 vegetation feed. I am currently using synthetic nutes but wanting to use bottled organics. Been looking at the biobizz organic line but will probably leave till the next run.

Captspaulding · Sep 20, 2024

It’s mag deficiency from your light interveinal discoloration.
The leaf edges and tips are turning,
You have the light to hot and possibly the light is too close as well or both.
Man I know you gonna say but the ppfd is in acceptable ranges.

It’s obviously not happy.
Raise your light, or turn it down or both.

Here’s some of my plants that suffer from the same thing. It’s really hard to avoid it in some cultivars because they’re extremely sensitive from the jump. What it means is is your plant needs an opportunity to harden off to the light so whenever you change your output, you need to go ahead and do it in small increments so the plant can harden off to the light instead of being shocked by 20 and 30% output percentage jumps.

Early Veg leaf discolouration - light edges.

Early Veg leaf discolouration - light edges.

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Early Veg leaf discolouration - light edges.

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What’s the matter? Don’t like clowns? 🤡

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