In St John's Park there is a special garden for the blind wi

In St John's Park there is a special garden for the blind with strongly scented flowers.
Q2:"strongly scented flowers"前为何不要冠词?要了有什么不同?
加上the,表示那一类 有浓香的 花 为什么不行呢？就是没懂这个.可以说the flowers,为什么the strongly scented flowers 就不行呢？