I planted a flower for my mother. She was so happy.
I planted flowers for my mum. It made her so happy.
Plant a flower - 花を植える
Planted flowers - 花を植えた
好きな花 - flower she likes, her favourite flower
春になったので - because it’s spring now, because it’s turned to spring
母のため - for my mother
イギリス- mum
アメリカ - mom
喜ぶ - happy, glad
母が喜んだ - my mum was happy, my mum was glad
喜んでくれた - she was so happy (that I planted flowers).