Answer: If you have planted several different types of plants in the same spot and they have all died, I don't think the problem is an insect or disease but rather a problem with the soil. It may be compacted or it may not drain as well as other parts of the flower bed. I would be inclined to dig out the area, amend the soil with organic matter and then fill in with the amended soil. If you incorporate compost, aged manure or other organic matter it will improve the drainage yet allow the soil to hold just the right amount of moisture to make the plants happy. Give this a try and I think you will notice an improvement in any plant you place in the newly amended soil. Best wishes with your garden!
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