I planted some Blue Ryder in it about 2 weeks ago. The guy at the hydro store said it would last at least 3 weeks (which would be when Blue Ryder should start to flower). But I was hoping to get a better answer because he didn't seem too sure how long it would last before I need to start using nutrients.I dont use it, but Ive read its about as hot as Fox Farms Ocean forest, and that'll usually go for a month before needing additional nutes.
If you're using it for seedlings, Id cut it just in case its too hot for them.