Questions i have regarding cannabis...

[ticsy]

hi! i have some questions i have always wondered about. Like they say you need ppfd and light brightness. But the sun is much highter than any led light you find, and the reading would go crazy if you tried to read ppfd/dli outside.. But why dosen't the plant outside get burnt?

Also when you have like super good soil (like black soil) and its full of nutrient, lets say npk 20-10-20 or something crazy like that, why dosent the plant get nuke burn then? why only when i add liqued food?

 

[Galgrows]

Hi ticsy good questions and i can only say from my experience that you can get burned plants if they are too young and not transitioned/hardend off properly. I've had uttra dry hot winds dry out the leaves never had burned bud but i think the trichomes would die off if left too long in hot direct sunlight for days on end.

The npk of the soil is very different than liquid or solid ferts. But still you can create to much N that will hurt young sprouts. Autos probley would not grow in it. But i've never ever had a soil mix like you say, and i mix my own. Sorry i could'nt help you much.

 

[Stokes]

I’ll take natural sunlight on a cloudy day over any type of artificial light. Plants have evolved to absorb it for hundreds of millions of years.

 

[Beachbumm]

hi! i have some questions i have always wondered about. Like they say you need ppfd and light brightness. But the sun is much highter than any led light you find, and the reading would go crazy if you tried to read ppfd/dli outside.. But why dosen't the plant outside get burnt?

Also when you have like super good soil (like black soil) and its full of nutrient, lets say npk 20-10-20 or something crazy like that, why dosent the plant get nuke burn then? why only when i add liqued food?

I've had plants grow right against the glass in my 1000 watt HID's with no damage, but LEDs focus light differently, thereby causing burns

However imo a lot of what's called "light burn" is because the plant has first become stunted in some other way.

'Light burn' has become a bit of a catch-all, like 'Cal-mag' was years ago.

 

[ticsy]

Okok, thanks for the replies... but i'm still wondering about the light dilemma.. why, and how.. The sun i the strongest light there is like a super floodlight, but the plants love it... but lamps (like led) have the same wavelenght as the sun (full spectrum) aybe my head hurt Xd

 

[Boke]

Outdoors is outdoors. Plants become use to it from germination.

Indoors is indoors. Plants become use to it from germination.

If you take a plant from either and transition it to the other, it will suffer. Unless done carefully and in steps.

 

[Beachbumm]

Okok, thanks for the replies... but i'm still wondering about the light dilemma.. why, and how.. The sun i the strongest light there is like a super floodlight, but the plants love it... but lamps (like led) have the same wavelenght as the sun (full spectrum) aybe my head hurt Xd

Okok, thanks for the replies... but i'm still wondering about the light dilemma.. why, and how.. The sun i the strongest light there is like a super floodlight, but the plants love it... but lamps (like led) have the same wavelenght as the sun (full spectrum) aybe my head hurt Xd

What part of leds focus lights differently are you having trouble understanding?

 

[Newty]

Also when you have like super good soil (like black soil) and its full of nutrient, lets say npk 20-10-20 or something crazy like that, why dosent the plant get nuke burn then? why only when i add liqued food?

Depends on the nutes you're using, synthetic liquid nutes are taken up right away while organic nutes and your soil nutes are being taken up overtime.