Asked January 17, 2025, 1:14 PM EST
Three years ago, we planted a large wildflower garden (1/2 acre) in SE MI with a native pollinator seed mix. Our custom mix was 25% annuals, and 75% native perennials and biennials. We prepped the site with shallow tilling (3x's over a two month period, only 5-6 inches deep). We planted in the fall and for two years, the site flourished with a diversity of colors and plants throughout the year. Then last year, we got a ragweed infestation. We tried pulling them out as they appeared and before they seeded, but we couldn't keep up. By last fall, it had spread throughout the planting. As a last resort, we mowed the entire site, but I fear that many of the ragweed plants were able to seed and I am anxious about this year's garden. Do you have any suggestions for remediating the problem? Preventing a new outbreak? We've tried to be chemical free so far, but are not adverse to using chemicals if it can save our planting. Or, do we just need to start over (an expensive and time-consuming proposition). I welcome any thoughts or advice you might offer.
Wayne County Michigan