Hi, I recently planted these Coneflower in Healthy Soil in full sun. I’ve only watered twice since planting (a week or so) and some are showing yellowing leaves at the base. Please assist, Thanks!
Certified GKH Gardening Expert
This may be a phosphorus and potassium deficiency from soils that are not alkaline enough. Soils that are too acidic will not be a suitable fit for these flowers.
Here are some articles that will help you to test and fix your soil, along with some articles for care of your flowers: