I'm a bit like Tom as i don't fertilize much, in fact i don't fertilize at all,all i do is add plenty of compost before i plant and then make sure they don't get to much water,which is easy for me as i live in a dry climate so its easy to apply want water is needed.
Below are my stud bulbs that were planted last week.
Sorry that's not in inches by the way,we cant buy imperial tape measures down this way