I like it. In fact, I like it alot. The watermark looks good too. Your logo is so unique that it may become identifiable even without the lettering. I would also recommend putting your logo on marking flags. The type of flags used to mark the location of sprinkler heads (so they aren't damaged during aeration or edging services). They can also be used to mark out planting areas or to outline a new feature that you are proposing to the client.