That makes disking easier and produces a nicer seed bed. More importantly, multiple disking and spraying cycles will knock back a huge amount of weed growth before you plant by killing each new round of growth. Spray the area, let it die and then disk it. ... Disk again, wait a few weeks and spray the next round of weeds.

Should you mow before discing?

Mowing vegetation two weeks ahead of discing or tilling allows enough time for much of the mowed vegetation to decay and break down. ... In many instances mowing is not necessary prior to tilling, but closely mowing the dead vegetation makes tilling the soil with a disc harrow more effective.

When should I disc weeds?

Disk or rototill the soil to kill weeds and break up clods. Disk when the soil is moist but; disking soil when it is too dry or too wet creates large clods. Remove any trash that might tear plastic. Disk the soil when it still has some moisture.