Yep! there's a term for Daisy Fleabane and other similar palnts that I am blanking on right now, but it will come in in huge numbers for just a year. You'll still have some next year but you will be surprised how much the numbers drop off. It won't harm the other plants that you're trying to grow.

V.

It might help to cut everything back so as to get more light to the smaller plants. That would also remove the flowers and reduce the amount of seed the fleabane produces.

The word is: Biennial

Also, opportunistic. Remember the movie Field of Dreams? If you build it, they will come! Linda

Early seral stage plants will give way to native perennials as they establish, competition for light/water/nutrients is increased in the favor of natives and disturbance is reduced. Same with ironweed (kochia) and russian thistle (salsola).

Daisy fleabane (Erigeron annuus) is most often a winter annual but will behave as a true biennial in some areas.

Agree with mowing to reduce seed population and reduce competition in favor of natives.

If you can, set it on fire next spring or this fall. You will be amazed at how it sets back the cool season weeds and grasses and gives the warm season natives a huge advantage. It really takes three good years of mowing and burning to break the non-native weed cycle and for your natives to get mature enough to make a run at going to seed with gusto. Don't worry about the daisy fleabane, it will be less next year especially if you mow it before it sets seed.

Steve