ffof is kind of a hot soil or plants these days are showing sensitivity, not sure which, but... looks like not much of a problem right now. just make sure that at 90 degrees you keep that soil wet. when the temp drops to the high 70's you can water much less frequently. let it grow several more inches then transplant to what will be it's final pot, at least a 5 gallon bucket. a large tote would be good to use but will take a lot more soil and take up space. don't add any ferts unless you're certain that you need to, and only do that at some point in the future. that soil should be good for several weeks, maybe the entire grow depending on how long you grow it. ffof might last for 8 weeks or more without added ferts, especially if you use a large container.