Newbie can't tell if this is light burn

VirginiaLegal · 2022-03-03T22:37:36+00:00

Hello - I posted in a different thread and a kind AFN person told me to post here. Below is the info but I should add that the spring water I am using has a PPM of 211. Thanks for all help and advice! Hello! I didn’t want to be the stoopid newbie that didn’t research and asked a question and then awesome AFN members roll their eyes! I have read many forums and examined dozens of pictures. And I still can’t tell if this is light burn. Forgive me! I am not the sharpest tool in the shed. I have also read absolute conflicting info-such as, “if you use LED lights you must add Cal-Mag” to “it is a myth, LED lights do not cause a Cal Mag deficiency.” Please help me. I have two Durban Poison Autoflowers. They popped out of the soil 15 days ago. The one in question is in Fox Farm Happy Frog soil. I planted the other in Fox Farm Ocean Forest. Look at the newbie doing a scientific experiment! Anyway, the one in Happy Frog started getting yellow tips on the new growth and newer leaves about 5 days ago. The other one was taller and closer to the light and didn’t get that. I raised the light two days ago to 24 inches. It is a Spider Farmer SF1000 at full blast. I leave the lights on 24/7 and have maintained temp between 65 and 80. I have to run a space heater to keep it hot enough but I am scared to leave it on at night, so I stay up way too late (obsessively reading about yellow leaves) and then turn it off for a few hours and that is when the tent temp drops to 65. I have humidifiers going and this week am trying to keep it around 65%. I have not given any nutrients, just spring water. I can guarantee that I have not overwatered them. That is the one thing of which I am sure:) I got a PH pen and a cheap TDS tester and did a soil slurry test. The yellow tipped one has a PH of 6.08 and 1110 PPM. I also tested the spring water and found out that it has a PH of 7.82 so I plan to use vinegar to bring it down on the next watering until I can get PH Up and Down. What is wrong with the yellow tipped one? It is getting worse. Also-please give me advice on anything I am doing wrong. The close up pictures were taken today. The picture of the two of them was taken 2 days ago. One more thing, the one in Ocean Forest is a much paler green. Is that because they say Ocean Forest is “hot”? I PHed that soil too and it came in at 6.62 with a TDS of 354 PPM. I gave up when I saw the PPM was so much lower. I thought if it was “hot” that it would have a high PH. See, I am lost. PS-I watched half of the lighting video by the professor from Utah in case that would answer my question and was lost but I can’t afford a light meter! I know he basically said that inches don’t matter, intensity does. I tell my boyfriend that all of the time;) so forgive me for telling you how many inches my light is above my plants but I have no other option. I really do want to be a good newbie!

Thread starter VirginiaLegal
Start date Mar 3, 2022

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VirginiaLegal

Mar 3, 2022

Forget to attach pictures in this new thread posting! I am not techy at all!

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Newbie can't tell if this is light burn

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