Dahlia with purple verbena

Care instructions: 

1. Dahlia should be fertilized with low or no nitrogen fertilizer.
2. Water Dahlia everyday during summer as its soil should remain moist.
3. Regularly deadhead spent flowers.
4. Cut Dahlia stems from middle to promote good air circulation. 
5. Due to several issues, I recommend growing them in containers than on ground.

Verbena and dahlias are perennials if well taken care of in winter. They are sold as annuals in nurseries.

1. Don't forget to water when they are dormant in winter. Once a month is usually enough. 
2. No fertilizer during dormancy.
3. During snowfall, it's best to place the container under shade