If you want more people in the guild at your level you are going to NEED to do the work to quest with people and if they have no guild and you think they are worthwhile joining, speak to them and invite them.
Clear enough?, you want people to quest with do things like refresh the "WHO" command in your area (under the friends/guild social menu)
It should come up with a list of ppl in your area and speak to them or speak in the general channel of the area you are questing in and ask for some help...
You don't need to exclusively quest with people from Hexus.Horde and certainly thats the only way i see the guild recruiting more members, is BY our members recommending people...
Down to you guys
TiG