Not bad at all. Your trees closely resemble something here in Mi. called Phragmites or tall reed and they are very invasive and plentiful here. If intermixed with different trees made from Sedum, and Golden Rod plus some homemade pines from Scotchbrite pads as well as making some trees using twigs from real trees and putting Lichen on it. Variety is something I like to do with my trees and intermix as many as possible.
I usually spray paint my trees with various shades of green then immediately hang them upside down in a piece of Styrofoam so they dry taller and straight.
enclosing pic's of forest and trees ready for planting.