It’s not just due to the light (I was having issues where the root ball wasn’t getting enough water due to using fabric pots)…
But just the same, Mars Hydro’s recommendations cook my plants. Others have said for autoflowers to keep the light 24" above and set it for 100%. That would be the same as setting it at 50% and having it 12" away, wouldn’t it? That would definitely cook plants, maybe even in flower.
THAT WAS BEFORE… This time… I’m being really careful. I just set the light for 50% today. It had been at 43% prior to that for quite some time, yet I was still seeing light damage on leaf tips (and some “praying”). I had been keeping it at about 20" and shooting for about 400 par.
Now that they’re both fully in flower, I was thinking it’s time to head toward 600 par, but if I am already seeing tender leaves…
That’s my whine. Here is the info, followed by pics.
Left: Girl Scout Cookies Extreme, flowered REALLY late and is gigantic
Right: AK-47, flowered early and is small for a 7 gallon pot but looking pretty good–some leaf tip damage from too much light, I think
Approx. 9 weeks old each (including veg)
Autoflower supersoil mix, tap water, tap is about 6.5 pH, water every 3 days (about one gallon each, but obv Cookie needs more water than AK); still add cal-mag, occasionally some bud bread or kelp juice
Can’t remember what else you need to know. It’s about 75F, and the humidity is always 40-50%, but I shoot for about 45%.
Best plants I’ve ever raised, believe it or not, because I realized I need to let them soak up the run off, and because I realized that prior to this THE DANG LIGHT WAS COOKING MY PLANTS! If a person uses the Mars Hydro recommendations, they will absolutely incinerate an autoflower. I don’t get why more people aren’t having this disaster.
Photos are meant to show that even with my conservative (I thought) lighting, damage is still occurring
I’m not sure what I need help with… I guess wondering if anyone else has had these issues and why there aren’t stern warnings for autoflower growers not to use photoperiod light settings (i.e. you need less par for autoflowers).
AK-47 with previously damaged leaftips
full view (Cookie on left)
Cookie with damaged leaf tips and lighter-green and yellowing leaves