How to Care for Dahlia Plants


Dahlia plants come in a variety of hues and sizes and can add beauty to any home or garden. They bloom in the late summer and continue thriving throughout autumn. In addition to looking beautiful in your yard, the dahlia can also be put on display in your home. In fact, once picked, dahlias can survive for up to seven days, as long as they're provided with adequate water and sunlight.

Step 1

Plant dahlias in an area that gets at least eight hours of sun per day.

Step 2

Apply a low nitrogen fertilizer, such as a 5-10-10, to the soil two weeks after planting the dahlias. Fertilize them again four weeks after the initial application. Follow the directions on your particular fertilizer for best results.

Step 3

Water the soil twice per week to a depth of 2 inches. It's best to water it over the course of 30 minutes to prevent flooding the soil.

Step 4

Put a stake next to each dahlia if they are a variety that grows over 3 feet tall. Tie the flower stems the stakes in 1 foot intervals.

Step 5

Spray the dahlias with a pesticide that works well at fighting spider mites and beetles. Begin spraying in mid-July, and do it once every two weeks through September.

Step 6

Spray a fungicide on the plants every two weeks, starting in late July. The leaves of dahlias are susceptible to mold growth once the temperatures and humidity levels rise.

Things You'll Need

  • Fertilizer
  • Water
  • Stake
  • String
  • Pesticide
  • Fungicide


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Keywords: dahlia plant care, fertilize dahlias, water dahlias, grow dahlias

About this Author

Kenneth Coppens is a part-time freelance writer and has been for one year. He currently writes for Demand Studios, eHow, Associated Content and is the Indianapolis Craft Beer Expert for Examiner.