I am putting down several inches of (cedar) mulch in my butterfly garden, as here in Dallas it gets up to 100 degrees F or more in August. I want to keep the moisture and protect the plants from the heat. Will this mulch prevent the self-seeding flowers from self-seeding? Or will the sprinkler system wash the seeds down into the mulch and allow them to sprout?
Certified GKH Gardening Expert
Self seeding flowers should still be able to sprout. The mulch breaks down over the course of the year and creates a good base for the seeds to grow in.