From the name it is clear that such garden flowers will grow in one season and bloom once. What are their advantages? It's simple:
You can change the color, size, type of flowers every year.
The cost of plants is relatively low.
Often these species have a very pleasant aroma, they are good to plant under windows.
There are also disadvantages: so, the plant you like next year may not grow like that, because the planting material is new every year. In the case of annuals that are not common in gardening, it is worthwhile to think in advance for a place for them that corresponds to the recommendations. Find out more about plants at https://flower4you.eu/.