We plant thousands of annual flowers but I have one small site that the flowers are just not growing. They came from the same vendors as our other flowers. They have had good bedprep with all the amentities as the others. They are getting watered as much as our other sites. We have added extra slow release fertilizer with no luck. I was wondering if there is a quick release fertilizer that might help. My wife has had flower crews for 15 years but never ran into this problem. Any ideas would be appreciated.