John, I have talked with the floating island folks a bit. I want to grow perennials because I'm lazy -- don't feel like replanting every year -- and because they usually have deeper root systems.
Irises for sure, maybe some native grasses.
What have you found that grows well?
I planted annuals the first year then experimented with vegetables the second year but what I think you will find is that weed seeds find their way to you plantings with your perennials in the next year and you may have to cultivate them. That's what I run into anyway. Finally the third year I just let the island grow what it wanted and it was interesting and looked natural.
