I love the profuse blooms and light yellow of my moonbeam, but my plants always lay over. My neighbors and those in your pictures are all upright. I had a plant in Seattle that was in dry sandy soil and received little to no care. It grew just fine but always fell over onto the sidewalk even though the foliage was brisk and full. We live near the mountains now, where the rain is heavy and saturating at times and frosts can be heavy well into May. The plant is in sandy loam and, like the first one, in hot afternoon sun. It receives more water and care than the other, but I can see no difference in performance. It too blooms beautifully but lays down on the sidewalk. I don't like the appearance when flowers are staked. What's your secret??

Just yesterday I picked up a good looking specimen of "Star Cluster" and one I hadnt seen until now ie "Cosmic Evolution". The flowers look very much like SC but bigger. The not too easy trick is getting them to survive the winter.

Star Cluster, planted in my cottage garden, came back better than any other coreopsis. That said, voles tunneled under other varieties out in the deer resistant meadow garden! So, it's not really a coreopsis issue. Redshift was reduced in width by the tunneling, but the remainder of the clumps look good. I planted seeds (in the fall) of native prairie coreopsis palmata and those seedlings look fantastic. Cameron

I don't have Bonanza, but have "Wide-Eyed," which has the same coloring. Coreopsis "Tinctora" would be nice, as would the "Lanceolata Sterntaler" or "Domino"- again, having the same coloring as your DL, and the more 'French's Mustard Yellow' that you're looking for. I think the three that you named might be too 'lemony' for your Bonanza. Additionally, I don't know how the airy foliage of the ones you chose might hold up against the strappy foliage of the DLs. Sterntaler (photos courtesy of Bluestone) Domino For a solid yellow, I'd be inclined to go with Grandiflora, or Early Sunrise (ES being the more well-behaved of the two). Early Sunrise Bluestone has some others, and here's another photo (they're a wholesaler exclusively) source I just found for more ideas: Here is a link that might be useful: Acorn Farms Coreopsis List