I may like entry #5. The I think the leaves on the v may make it too busy. Maybe drop the leaves. Possible used two shades of color for the font. I also like the simple look of the sencond entry. The leaves above it seem disproportionate. They are almost too big. Thanks for sumbitting your entrys. I am looking forward to seeing more.
The feel like the entry with the leaf on the left looks more like a flame (entry 3). Maybe you can create some type of background instead to create more color.
Entry 4 looks like it may belong to a solar company.