I've said this before on lawnsite. Facebook is INTERRUPTION marketing. People aren't likely to FRIEND/Like you because they are in love with Landscaping.
However, I think it could be wise to post some things that your customer may be looking for. Example... Regional items of interest, links to tutorials that are informative about lawncare that you didn't even author.
A few tools that I think could be useful for this (all are free).
- Feedly - A free news aggregation tool. Type in "Landscaping" or [YOUR CITY] and you can save feeds (including Youtube items, News items, etc) as they become available.
- Bufferapp - A cool tool that allows you to "buffer" your posts, so that they aren't all happening at the same time.
If you have an iPad, both of these tools have apps that interact with one another. In other words, set up your feeds on feedly and then send the ones you like to buffer.
Good luck to you