Supplemental watering may be needed, especially during establishment. Maintenance Aggressive competition from weeds can be a problem in wildflower plantings. In addition, some wildflowers produce large quantities of seed and can dominate other plantings. Periodically, weeds may need to be eliminated. Herbicides may be used in some plantings, but no one herbicide is available that will control all weeds without harming some wildflowers or grasses.
Hand pulling weeds is effective on smaller plantings.
Mowing is an effective weed control method during the first year on direct seeded, larger sites. Mow to a height of about 6 inches. Annuals and perennials planted together can complicate mowing especially during the first growing season. Providing the right amount of moisture is important. For example, do not overwater plants adapted to dry sites.