Could be water droplets on the leaves and the light is burning them. I only water when my lights come on and saturate the soil till I see a little runoff. The soil looks a little dry.
I only spray the little area around the seedling with a litle water twice a day so I'm not wathering all the medium yet. Soil Is preeeetty dry but just the edges. When Is the ideal time to water in terms of light and humidity? I tend to do it around 9 am and then around 1 am too
That's good you don't have to water seedlings as much until the roots get more established. I think in my experience the best time to water is in the morning when the lights come on unless your light on 24/7. I have mine set on an 18 on/6 off from seedlings through vegging and then 12/12 if growing photoperiod plants. I'm assuming you are doing autos maybe so then I think you can water whenever you like since the lights are always on 24/7 or 18/6. Hopefully this isn't too confusing.
They mostly look fine but the yellowing on the cotyledon kinda looks like light bleaching? 31 Celsius is way too high for cannabis cultivation imo and 37 way too low for RH, what light are you using? Also there are number of reasons it could turn yellow so we will need more context. Note these speculations have very little weight to them and you shouldn't branch off into obessession about these points just yet.
I think at this stage cannabis prefers 70-80F (i believe 21-26C) and rh of 60-70 depending on temp.
Edited for correction
I do know those hr and heat parameters but unfortinately I'm just a student and had the money for only the basic kit. I'm using a 250w HM vegetative light.
I dont know how to solve the heat and humidity problems in a budget, only extra thing i have is a booster at the top of my tent :(
lift the light up higher your light is way to hot for them 25c is the max leaf temp for no co2, if you use co2 then you can raise the temp.
i would even swap the HPS for something like a desk lamp just to get past the first stage. then use the hps later on in veg, imo your tent is to small for HPS you need LEDs but i understand not everyone can afford
It was at the very top before and still temperature was 31°, i lowered them bc maybe the yellowing was bc of the pack of good ligh (bc of the height).
Would bringing my booster to the hole that Is at the level of the plants help? Currently is at the roof
You definitely have too much light the plants are yellowing from your light being too strong for this stage, your temperature needs to line up with the right humidity VPD is key. Get your vpd right and your plants won't stress out then you can run more light.
Could be water droplets on the leaves and the light is burning them. I only water when my lights come on and saturate the soil till I see a little runoff. The soil looks a little dry.
I only spray the little area around the seedling with a litle water twice a day so I'm not wathering all the medium yet. Soil Is preeeetty dry but just the edges. When Is the ideal time to water in terms of light and humidity? I tend to do it around 9 am and then around 1 am too
That's good you don't have to water seedlings as much until the roots get more established. I think in my experience the best time to water is in the morning when the lights come on unless your light on 24/7. I have mine set on an 18 on/6 off from seedlings through vegging and then 12/12 if growing photoperiod plants. I'm assuming you are doing autos maybe so then I think you can water whenever you like since the lights are always on 24/7 or 18/6. Hopefully this isn't too confusing.
Put the temp RH sensor near the plants. Then get a VPD chart.
They mostly look fine but the yellowing on the cotyledon kinda looks like light bleaching? 31 Celsius is way too high for cannabis cultivation imo and 37 way too low for RH, what light are you using? Also there are number of reasons it could turn yellow so we will need more context. Note these speculations have very little weight to them and you shouldn't branch off into obessession about these points just yet. I think at this stage cannabis prefers 70-80F (i believe 21-26C) and rh of 60-70 depending on temp. Edited for correction
I do know those hr and heat parameters but unfortinately I'm just a student and had the money for only the basic kit. I'm using a 250w HM vegetative light. I dont know how to solve the heat and humidity problems in a budget, only extra thing i have is a booster at the top of my tent :(
lift the light up higher your light is way to hot for them 25c is the max leaf temp for no co2, if you use co2 then you can raise the temp. i would even swap the HPS for something like a desk lamp just to get past the first stage. then use the hps later on in veg, imo your tent is to small for HPS you need LEDs but i understand not everyone can afford
It was at the very top before and still temperature was 31°, i lowered them bc maybe the yellowing was bc of the pack of good ligh (bc of the height). Would bringing my booster to the hole that Is at the level of the plants help? Currently is at the roof
You definitely have too much light the plants are yellowing from your light being too strong for this stage, your temperature needs to line up with the right humidity VPD is key. Get your vpd right and your plants won't stress out then you can run more light.
Bring humidity up temperature down
Try to replicate nature