Hi, one of my cauliflower plants I recently bought & transplanted to my garden is not producing any more leaves since I bought it (2 weeks ago at least), and another has a round nub where the new leaves should be coming. What is wrong witht them and is there anything I can do to fix it? They did have a small infestation of small green caterpillers but I have been picking them off every day and they are free of them now. Thanks