Hi M&R
Firstly i beleive this is the thread that Eileen is talking about
http://www.small-business-forum.com/...ead.php?t=2076 .
Also if you are looking for some other services rather in the Garden Maintainence then the Landscape side here are a few you could consider.
1 - Weeding
2 - Spraying the lawn for Bindi or Weeds, usually once or twice a year people may want this.
3 - cutting dead branches from trees (just keep it to small trees and bushesbecause you will need quite a bit more insurance i would imagine if you are working on large trees.
4 - Clearing Garden scrub, many people will have a corner of their yard which has piles of grass clippings, and branches and bushes that have been cut down, in most cases people never get round to do it and some may like it taken away for them. One thing to consider in this would be that some local authorities will charge you to take this type of stuff to the refuse station(dump) so you will need to factor this into the cost, unless your local authority offers tickets to the residents and then you may be able to ask them if you can use that to keep their cost down.
I hope these ideas help you out, and good luck with your business.