John says that his bulb meadow does not require that much maintenance. By June things look a bit ragged, so he has started using a grass specific herbicide to control the taller more rampant grasses. Last year he burned off the top growth, and the results were encouraging, with improved growth and flowering of many species. He says that purple vetch has been a problem but, other than that he has few weed problems. A planting such as this is likely to need some hand weeding, and which weeds are problems will depend a lot on the area and climate you live in. In my area, surrounded by fields, I am definitely going to have weeds from seed blowing in.