Some weeds, such as crabgrass, become very difficult to remove from the garden after they have become established. Crabgrass forms roots at nodes along the shoots, giving them a firm hold in the soil which make them very difficult to hoe or pull out. Use care when pulling large weeds that are growing close to desirable plants because the roots of the weed and the other plant may be intertwined. You may uproot both plants by accident. There are essentially two types of weeds in our gardens, annuals and perennials.
Annual weeds grow rapidly, flower, set seed and die in a single season.
It is very important to destroy these weeds while they are small, before they produce thousands of seeds, guaranteeing a weed problem for many years in the future. If these weeds have taken over your garden and you can't hoe or pull them out, mowing may be an option. This will reduce the height and slow or prevent flowering and seed formation. However, some low-growing weeds, such as crabgrass and purslane, will elude the mower. Fleshy-leafed purslane also presents another problem.