Dan Boone wrote:I have a pineapple plant growing happily after I buried the cut-off top, but of course it's purely ornamental and for fun in this zone, I'll wave goodbye to it come winter. Likewise the very happy mango plant that I grew from a seed this spring. And I'm told that the lemongrass I grew from a supermarket bunch will not survive my winters, but at least I'm using it now.
Dan, your lemongrass might still not survive, but try this: Before the first frost, cut the above ground growth down as far as you can. Then cover with a foot of leaves or straw and add to it if needed over winter.