Definately does not like competition from weeds of any sort. Likes good drainage and non-compacting soils. For those Aussies on here there is some very good information on this site
https://www.australiangarlic.net.au/
It is important to plant your garlic at the appropriate time of year, not all garlic gets planted at the one time, where we are there is a three month spread of planting/harvest times.