It was the first rose of the year,big,red and heavy-scented,

It was the first rose of the year,big,red and heavy-scented,and I had watched it grow from a bud ,
接上面but somehow I had missed the final stage of the shape change ,so that it seemed to have changed from a bud to a full-blown rose overnight .(Division)
请帮帮我翻译上面这句话