I have
Advanced Nutrients - Heavy Harvest Fall
and
Advanced Nutrients - Heavy Harvest
They state it is for outdoor soil.

I plan on indoor soil.


Anyone have experience using this brand?

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No reason it wouldn't work indoors in soil. The difference is that outside there's a lot more of everything. So you'll want to go a bit lighter on your application to avoid salt buildup. Beyond that it shouldn't matter.

You could even call Advanced Nutrients and ask them if you like, they would know for sure.

AN's Heavy Harvest line-up are time release formulas, and probably not best suited for indoor growing. They are outdoor products intended for when you want to "set it and forget it" - aka only come back to your crop 3 times in the year.

I would strongly suggest staying away from time release formulas, as they are difficult to control and predict, and provide basically no benefit for indoor use.

If you want to stick with a simple nutrient system, you could try one of AN's base nutrient programs, such as Iguana Juice (1-part Organic), Sensi (2-part), or Grow/Micro/Bloom. Of course, any other brand's products will also work fine.

Well you do want to be careful with a time-release fert indoors, but there's no reason you can't use it.

You just have to be careful is all. I'd rather use Iguana or Sensi like you say, but if I wanted to have a hands-off kind of thing the right dosage of Heavy Harvest could work.

I'd call the tech support line to be sure how much to use, though.