Back in a past life as a somewhat "migratory beekeeper" we used a rideon(36" Greenfield) before doing a layout, today with what colonies I do keep permanant a hoe keeps it clear. Given we now have SHB @Lat.18 the soil turnover might deny having to use chemical as Confidor (tm) et al.
Indoor/Outdoor carpet *is* synthetic however one tough weed coming through it brings the rest, not good.
Nutgrass is rampant here as is blady grass, both will go through weakened gal.iron sheets!
Cheers.
Bill