The Q&A Archives: Cosmos problems

Question: Why do the edges of my cosmos leaves turn brown and eventually die? The plant gets scantier until I pull them up. No trouble blooming though. In a slightly raised garden with lots of composted soil. These are suppose to be the easiest to grow! help please

Answer: Cosmos typically are easy to grow so I'm not sure why yours are browning and dying. Sometimes too much fertilizer can cause those symptoms, as can too much water. Try pruning them back twice during the growing season to encourage lots of new growth. Hope this helps!

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