If the plot is clear of perennial weeds already and the only thing to tackle are the annual weeds (for example, groundsel, with yellow flowers, bittercress with white flowers and cress-tasting leaves, speedwell with pretty blue saucer flowers), one of the best techniques is to cover the vegetable plot for a few weeks in early spring. This will increase the soil temperature, giving you ideal conditions for you to plant and sow the seeds a bit earlier, than left uncovered to all the elements.
Its best to use clear plastic sheets which are widely available at gardening centres, the sheets warm and dry up the soil and the transparency of the sheet encourages the germination of any dormant weed seed. After a few weeks, when uncovering the sheet for planting any grown weed can be easily picked out by hand or by tools giving you a completely weed free soil bed ready to get started.
Another key thing with weed control is to use a carpet of mulch to prevent any weed seed that drifts in from germinating in your soil. As you come to plant your vegetable variety seeds, it is beneficial to lay approximate 2 inches of mulch. (cheap municipal compost available from many town councils, mushroom compost or leaf mould) in between your rows. This should make your patch relatively weed-free through the summer and so easier to maintain.
It’s important to rid your garden of weeds because they rob your soil and your plants of important nutrients and water. The key is, as discussed in the beginning to be consistent, weeds can grow very quickly so it’s important to stay on top of weeding throughout the different growth stages of your vegetable plants.