Starting Dahlias For My Summer Home Garden 

Dahlia From TuberIn this post I will be sharing how to start dahlia tubers for my home garden.

Starting Dahlias for My SUmmer Home Garden

When I saw my first dinner plate dahlia at the small garden center I worked at in 2006 I remember thinking I could never grow that. I’m frantically looking for a photo of that bloom because I remember admiring it every day I worked just dreaming of that flower in my garden someday.  This past summer I grew over a dozen different dahlias from tubers in my home garden.

Head Start

For the past three years I’ve been starting the dahlia root early in my greenhouse.  You can do this indoors if you have a place to store the containers that stay above freezing and gets sunshine.  A garage will work if you move the planted containers out into the full sun each day and bring them in when the temps go below 40*F.

Video on YouTube at Bren Haas YouTube Channel. 

For this project I use 1-gallon containers that I recycle each year for this project.  These are containers you get when you purchase plants at garden centers.  Be sure they are CLEAN!  Wash the pot off if you have stored it in a shed or garage.

Soil Mix For Starting Tubers

Use a fresh mix of seed starting soil.  My recipe is as follows:

  • 1/2 organic peat moss
  • 1/3 organic potting soil
  • 1/4 perlite

You can also use a good potting soil just be sure it doesn’t stay soaked with water.  Too much water can kill the tuber.

I water my newly planted dahlias with a fish emulsion water in the greenhouse when possible.  You can use rain water too!

Potting Up The Tubers

Dahlia Tuber

Dahlias can be kind of tricky when you pull them out of the shipping container.  At first, I had a hard time trying to figure out what was what?!  Seriously – it all looks like a big root alien when you pull it out of the wood chips during shipping.

*** I was told to make sure to plant tubers horizontally with visible eye pointing up with some of the eye showing out of the soil.  For the past few years I’ve not been leaving some of the eye point out of the soil and the dahlias have grown successfully.

Recycle Containers for Dahlia TubersI have a few dozen containers in the greenhouse that I dug up last Autumn and thought the tag would make it till spring. WELL GUESS WHAT – now I have 12+ dahlias that I have NO IDEA what variety they are. What I learned from this.

Plant Tags

  • Always tag your plants
  • If tag is fading – take the time to re-label
Growing in the Greenhouse
The containers are now ready for some heat and sunshine.

I give my dahlias the head start in my greenhouse but you could also store them in a garage or sunroom overnight as long as it doesn’t freeze.  Be sure to set the containers outside in the sunshine during the day.  I will plant these in my garden after all danger of frost has passed.  This year is going to be an amazing Dahlia Garden Show in my yard and I can’t wait to share them with you on my site so please be sure to subscribe!

starting dahlia tubers in greenhouse

Let’s Connect

In conclusion, I would love to hear from you.  Feel free to leave a comment on this post or reach out on my contact page. 

Bren Haas

Bren Haas

Bren Haas

Bren Haas is the creator of GardenChat which is the first online gardening social community using social media. Her website features gardening tips and tricks, recipes, travel ideas, product reviews, and social media how-to help from her personal and unique experiences.

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