I only have one in my garden and I just bought it this year, last year though I had a whole bunch of annuals turn black--the culprit being too much rain.....have you had an excessive amount of rain lately?????? I don't know what the best answer is for you.......not sure if you should cut it back and hope for the best since it's still kind of early, or if you should leave it and hope for the best.......someone should have a good answer for you though.