Firstly, make sure you have a completed Flower House in your Kingdom. To add Flowers you need to:
- Click on the Flower House;
- Click the “Add More Flowers” button and you will be able to choose the Flowers in  your Kingdom that you want to store:
 
-After add all the flowers you want, you can check the growth time of each flower in your Flower House. You can take the Flowers out by clicking in the “Use” button, you can also water your flowers one by one by clicking on the Watering Can button located just below the flower. 
Or, you can water all the Flowers at once by clicking in the “Click to Water” button ton the bottom right:
 
Attention:
-The growth time of the Flower that you want to store will be reset when you store a Flower from your kingdom.
- Make sure the flower is tended before you store it.
- You can upgrade your Flower House to store more Flowers when you fill all the empty slots.