、。
If you ask, you can have that flower.
Literal
Ask-[if-ば], that flower [subject-を] receive-can.
Note 華 instead of 花 — 華 is a variant kanji emphasizing 'flower as an aesthetic / gorgeous,' more often used in proper names, art, or stylized contexts. もらえる is the potential of もらう ('receive, get'), so 'be able to receive.' The ~ば conditional gives the conditional 'if/then' frame.