It's true that I am not familiar with any
nutrients called 'Golden tree" (and still don't). However that wasn't what lead me to the conclusion that they were talking about growing in soil. There were three statements that lead me to believe that:
1. "using natural compost" (that's not a
nutrient solution)
2. "Why you should prefer compost to commercial fertilizers" (again compost is an amendment, not a nutrient solution. even as a compost tea that was never mentioned)
3. "consider using a quality nutrient additive" (a nutrient additive isn't a replacement for a nutrient solution, it's an amendment even in soil)