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.

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.

What is the best and fastest way to kill weeds?

When looking for a natural alternative to herbicides, a cocktail of vinegar, salt and liquid dish soap has all of the ingredients needed to quickly kill weeds. Acetic acid in the vinegar and the salt are both very good at drawing moisture from weeds.