I’d say almost 2 weeks since sprout little lessIs that coco or soil?
How old from sprout?
Temp is 75 humidity is 62% light cycle is 24/7 water them when soils dry so like 2x a daytoo much water, soil too hot (nutes), PH imbalance. Probably the 3 most common mistakes and since we have no idea what soil, what nutes, what temps, what rh, or any other useful info about your grow environment, you are likely going to get more questions than answers.. My opinion - start over - this sprout is not worth trying to save imo.
Lights 20in above it and idr the watts but it’s a lot I did the conversion bc it goes by % so I have it had 40% and the soil is called nectar of the gods I believe and I have a water bottle I mist it with 2x a day one in the morning one at nightDon’t feed any nutes for a while. Let soil dry for a few days . Ph might be off. I recommend using a water bottle for a few waterings. Let it got a few days between water . And also what soil are you using how close is the light and what type of light and wattage is it?
GotchaIf that is soil, and not coco, little sprouts like that should be able to go 2-5 days between watering. 2x a day is too much for them.
SoilIs it soil or coco? Kind of important.
Soil