I've got bunches of weeds (clover, dollar weed...) and plan to lay St Aug sod. Will laying the sod on top of the weeds be enough to kill them or do I need to do more beforehand? My yard is organic so I'd like to use those types of measures.
There is no organic weed killer other than pulling or vinegar. YOur best bet is to have someone come in with a tractor and box blade to re-grade the area. When finnished you will have a perfect bare dirt surface to lay the sod on.
Next best bet is spray the whole yard with Round UP wait a week. Scalp the area, rake up the debris, and sugar coat with top soil.