For the green thumb - Gardening without chemicals. The right measures for paths, lawns, ornamental gardens, and vegetables. Suppressing and preventing: Effectively prevent unwanted weeds. Gone are the days when all those "weeds" were ruthlessly eradicated with highly toxic sprays. Our view of garden plants and the self-sown "weeds" is changing. Primroses and daisies have a place in the lawn. However, the growth of many unwanted plants still needs to be contained and, in some cases, prevented. The methods range from proper mechanical weed control to preventive measures such as mulching or planting ground covers, as well as biological control agents like nettle manure. Different methods are used in fruit and ornamental gardens compared to vegetable gardens, pathways around the house, or lawns.