Hi there, I am new to gardening and so far no real problems until I planted these 3 pregrown Bonnie cauliflower plants. The comparison is from 2/22 (bought as is) to 2/28. The vegetable itself is uniqu to one another 1-turning brown, 2-looks as if it’s flowering and the 3rd is rottin. Each plant is also having major leaf problems. Some of the issues look pre-existing, newbie luck. Others, like leaves coming off started after planting. Please help!