Are you interested in growing dahlias from seed? I’m here to tell you it’s not only possible, but incredible fun and pretty darn easy, too!
What is a Dahlia?
First, off let’s make sure we all know what a dahlia is. A dahlia is a beautiful variety of flower that is very popular in cut flower gardens.
They are native to Mexico and South America, but can be grown in a variety of climates. Yes, you can even grow dahlias in cold climates like Colorado (we successfully grow them on our zone 4 flower farm!). Dahlias have a huge range of colors, sizes, and varieties. It’s one of the things that make them so unique.
The other interesting thing about a dahlia, is that a seed will not recreate an exact match of the mother plant. Dahlias have eight chromosomes (most plants have two) so the offspring created from a seed can vary wildly.
The tubers, on the other hand, create an exact match of the mother plant. So if you want to grow a specific variety, shop for dahlia tubers.
If you’re interested in a surprise or want to create a new dahlia breed, then go with a seed.
Growing Dahlias from Seed
First, you’re going to need to get some dahlia seed. I really like the Bee’s Choice Dahlia Mix from Floret Flowers.
And once you start growing your own dahlias you can always save your seed and use that for future plantings.
I recommend starting the seed indoors in early spring. Dahlias like warm weather and also need around 12 to 16 weeks before they bloom. Plan accordingly based on your garden zone and climate.
Since we’re growing in zone 4b at high elevation we need to give our dahlias a big start so that we get blooms before frost comes.
We start seeds and dahlia cuttings in March and April. We have a small lean-to greenhouse that is minimally heated at night.
You can also start seeds inside using a light.
How to Start Flower Seeds
Dahlia seed is relatively easy to start. It’s larger in size and east to work with. Here are the steps for starting seeds.
1. Gather seed starting supplies
At a minimum you’ll need seed starting soil and a container to hold it. I prefer to start dahlias in a 72 cell tray and use a bottom tray for watering.
2. Prepare soil
Add water to your soil so it sticks together, but does not drip water when squeezed.
3. Fill seed trays
Fill tray with soil. Tap on a hard surface to ensure each cell is equally filled.
4. Add seeds
Use a pen or chopstick and make divot in each cell. Place one seed per hole and cover with soil or vermiculite.
5. Place in light and watch grow
If you’re growing inside, be sure to use a light. Even a sunny window really does not provide adequate light for optimal growth.
You could use a heat mat, but it’s not required. We start hundreds of seeds every year and never use a mat as we don’t want to waste the power since we live off-grid.
Be sure to keep the soil moist, but not excessively wet. I prefer to use a bottom tray and add water to it instead of overhead watering.
FAQ
Are dahlias hard to grow from seed?
It is NOT hard to grow dahlias from seed. They do like a warm temperature for germination, so a heat map is recommended. And remember that dahlias are sensitive to cold temperatures, so don’t plant them out until after your last frost date.
Will dahlias grown from seed flower in the first year?
Yes, dahlias grown from seed will flower in the first year. Flowers will appear 3 to 4 months after germination.
Do dahlias grown from seed make a tuber?
Yes! Dahlias grown from seed make a tuber that you can keep and grow again the next year.
What’s the difference between dahlias grown from seed or dahlias grown from a tuber?
Dahlias grown from a tuber are an exact match of the tuber variety, whereas dahlias grown from a seed vary wildly and do not match the seed.
Do dahlias come back every year?
Dahlias are perennials and will come back every year, in warm climates. Most farmers and people in colder climates need to dig up their dahlia tubers. Jennie Love is known for overwintering her dahlias in zone 7/6b.
Conclusion
It’s a whole lotta fun to grow dahlias from seed. I love them because they’re among the most deer-resistant flowers. Plus they’re easy to grow and offer up a fun surprise.
And if you end up discovering a new favorite flower you can save the tuber for future plantings.
More Dahlia Articles You May Like:
Sweet Nathalie Dahlia
Sweet Nathalie Dahlia is a highly desirable variety of dahlia that is sought after by both professional and amateur gardeners alike. With its medium-sized blooms featuring a delicate blush to cream-white color and a buttery cream center, it is no wonder this flower has captured the hearts of many. In this comprehensive guide, we will explore the various aspects of the Sweet Nathalie Dahlia, including its growth habits, care requirements, and uses in various settings.
