The one thing I am told the most often is ‘Help! My dahlias are not blooming. Dahlias are the best flower to grow with the most reward, so I want to help answer why are the dahlias not blooming. I will also be sharing my favorite dahlias for cutting in a garden, because I have grown many Dahlias in my small urban garden successfully.
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Some of the main reasons that dahlias will not bloom are; too much fertilizer, the watering schedule, lack of sun exposure, the soil being used is too heavy or you are not cutting your flower often enough. Other issues may be related on how you grow your tubers indoor in the spring. Let’s explore each of the issues and how to get your dahlias blooming!
Main Reason your Dahlia may not be Blooming
This is the overarching surprising reason why your dahlias may not be blooming; you loved them too much!
But for dahlias, less is more, literally!
This was the hardest thing for me to understand and accept. I am a nurturing person with my garden and had to learn. Here are the main reasons I consider to get non stop blooms.
I am a home gardener, self taught and have learned by trial and error. Read my post ‘Dream Garden Walkthrough 2021′ to see my garden’. READ HERE!
For more creative and easy flower arrangement visit ‘EASY FLOWER ARRANGEMENTS | DIY FOR BEGINNERS’. READ HERE!
HOW TO START YOUR TUBERS INDOORS AND PLANT THEM OUTDOORS
- GROWING TUBERS INDOORS: When you are growing the dahlia tubers indoor, do not use compost, use good soil with a slow release fertilizer, such as osmocote. My experience has been that if you are in a zone that warms up later in the season, like zone 8b, stating tubers indoor will provide you with blooms sooner. If you are in a warmer climate, lucky you, just start them earlier outdoors after your last frost date.
- GROWING OUTDOORS: Once you bring them outdoors to plant them, again, mix good quality soil with some compost and apply osmocote. Good quality soil means that it allows good drainage. I mix half of compost (organic fish compost is my favorite) to an organic garden soil. This is me, you can probably use what you have, but this mixture really has helped me with getting healthy plants and provide many blooms.
Now, if you want to overwinter your dahlias outdoors and not go through the work of bringing them in, it may be okay. Check out ‘Can You Leave Dahlias in the Ground Over Winter’ to see if you are able to keep them outdoors and the steps you need to take.
Check out my Instagram for a reel on how to plant your dahlias @cocoonraw
You want to learn how to grow more flowers and plants from seeds? Check out the post ‘BEST SEED STARTING STATION DIY | SEED STARTING’. READ HERE!
FERTILIZING THE RIGHT WAY WHEN YOU FIND YOUR DAHLIAS ARE NOT BLOOMING
- FERTILIZING THROUGHOUT THE SEASON: The Dahlia Season is July until the first frost, this will vary per zone. To find out when this is, look up your city under first frost in google.
- The most important thing to do in order to get your dahlias blooming is; DO NOT FEED DAHLIAS SO MUCH! I do not feed my dahlias anymore after I plant them in the ground. They wake up hungry but if you have good soil, they will be happy.
LOOK AT WATERING WHEN DAHLIAS ARE NOT BLOOMING
- DO NOT OVERWATER: Dahlias do not require a lot of watering. They may look sad because the sun is shining, but wait until it cools off and you will see the dahlia come back to life. The tuber stores water and the dahlia is just saving energy, therefor, Water once or twice a week, but make it a deep watering.
- KEEP IT HEALTHY: Powdery Mildew is the biggest issue. For this reason, remove the bottom leaves and space your plants properly to allow the plant some air flow. For dinnerplate dahlias I space 18″ -24″” apart, I prefer the extra space, larger dahlias 9″ to 12″ apart, smaller dahlias can take less, small lowering dahlias 2′ apart and Taller Dahlias(above 3′ tall variety), I allow 3′ sometimes, but I have done 2′ apart.
- FIRST TIME WATERING AFTER PLANTING IN GROUND: After you plant your tuber, do not water your dahlia until first growth is showing.
- SUN: Dahlias need sun, at least 6 hours, the more the better. But do not confuse that with heat. If you are in a hot zone, 6 hours may be plenty. The dahlia tuber can be damaged and cook with excessive heat. Think Potato! Very similar characteristic to a tuber. In a cooler climate, 6 or more hours will work well. Here in Washington State, Zone 8b, all day sun works just fine. If you live in a very hot area, use mulch to retain moisture. I do not use any mulch in my zone, 8b, works best.
For more on organizing and getting the most information about your plants check out ‘Organizing ideas diy | Plant Tag Hacks’. READ HERE!
THE IMPORTANCE OF CUTTING YOUR FLOWERS IF DAHLIAS ARE NOT BLOOMING
- BRING THEM INSIDE!: Don’t be shy, cut those flowers to encourage new growth. Always be cautious to do a clean cut. Cut them with long stems, take a bud, it will be better and provide new and longer stem on the flowers.
Time to have fun! Learn more about the dahlias I grew this year and which have become my favorite on ‘Dahlia Flowers Season | BLOOMS THAT STOLE MY HEART!’. I have an absolute favorite you should consider growing next year!
Do you want to learn more about the gardening tools every beginner gardener should know about? Read my blog post ’10+ FAVORITE Gardening Tools for a Better Experience.’
Dahlias are easy flowers to grow, they don’t require a lot of feeding and watering.
Understand where you are planting your tubers and the conditions to get cutting flowers and plenty of blooms.
You will enjoy amazing cutting flowers!!!!
SHOP BELOW TO GROW DAHLIAS, MAINTAIN THEM AND DISPLAY THEIR BEAUTY!
LET THE FUN BEGIN! MY FAVORITE DAHLIAS!
My favorite Dahlias criteria is based on the following:
- Blooming consistently
I have many others, but these stood out as my rocket bloomers!
Read my post, ‘COZY UP with Tea and a Flower! Life has really Changed!
Petra’s Wedding Dahlia
This is my favorite Dahlia! You do not have to worry about your dahlias not blooming at all! Petra’s Wedding is the most prolific in my garden and provides blooms all season long, from July to the first frost.
The color is beautiful, pure white with the bright yellow center that comes out at the end. The shape is this round cotton ball look and a perfect size for bouquets.
I will always have this dahlia in my garden!
Totally Tangerine Dahlia
If you are looking for a dahlia that gives you two in one, this is it! And what I mean by that is that it transforms as it opens, in color and look.
Totally tangerine is a show stopper!
I love the colors, from bright to a softer orange at the end with a hint of the soft pink.
Another one that is perfect to use in flower arrangements!
Cafe Au Lait Dahlia
The dinnerplate dahlia is beyond elegance in my book!
Another one that if you are saying, Help! My Dahlias are not blooming, this one will make you so happy!
It blooms in clusters and it is a dinnerplate size, but not as huge, which makes it easier to use in flower arrangements.
A true beauty in color with a vintage flare.
I HAVE TO SHOW YOU TWO PHOTOS, BECAUSE YOU HAVE TO SEE IT UP CLOSE!
Check out my Instagram to learn more about the amazing dahlias I have grown! I have many more! @cocoonraw
Belle of Barmera Dahlia
What a surprise!
This dahlia looked nothing like what I found on the internet, so much more beautiful and unique.
The look reminds me of a painting, soft and ever changing as it grows. Always transforming from more white showing at the beginning and it transform into this rich rust color. Stunning!
The shape is more round, not a flat look.
Romantic Mix Dahlia
I had to absolutely include this one on my top favorites!
It is definitely so romantic looking, the name is perfection.
You will get so many blooms and the size is perfect, right in the middle. The color is just so beautiful, off white with a hint of rose and buttery yellow in the center.
Another one that transforms and will make you so happy!
Dahlias are the biggest gift, so many selections out there. The search for new ones is always happening.
Remember, have fun growing this beauties!
I know I will!
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