Flower I planted in weedless ground (9)
I believe the answer is:
edelweiss
'flower' is the definition.
(I've seen this before)
'i planted in weedless ground' is the wordplay.
'planted in' is an insertion indicator.
'ground' indicates anagramming the letters ('grind' the letters into a new form).
'weedless' is an anagram of 'edelwess'.
'i' placed within 'edelwess' is 'EDELWEISS'.
(Other definitions for edelweiss that I've seen before include "Swedes lie about small white flower in Switzerland" , "Sound of Music plant" , "White-flowered alpine plant" , "Perennial Alpine plant -- we see lids (anag)" , "I weed less when this flower is around" .)