Flower category (6)
I believe the answer is:
annual
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flower category</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for annual that I've seen before include "Once a year, perhaps a book" , "Book published yearly" , "Book; occurring once a year" , "Occurring once every year" , "Hardy it may be" .)