After a lavish first blooming my seemingly healthy blanket flower died completely back. My foreclosed right beside it seems fine and is blooming fine. Help?
Any sign of insects or disease on the leaves?
The plant generally should not have died back until fall.
Since you have other plants nearby that are not effected it is not likely environmental.
You could try to treat the remaining plant with Neem Oil. This acts as both insecticide and a fungicide.
Sometimes a loss of plants just can't be explained.
Here are a couple of articles for you.