Dahlias are the shining stars of any summer garden, and knowing how to properly deadhead them is vital for extending their blooming season.
With an impressive variety of dahlias available, you'll find them in numerous colors, sizes, and shapes, including striking multi-colored varieties and those with dark foliage. Growers worldwide are continually introducing new types, and the possibilities for your garden are nearly limitless. Fortunately, with attentive care, dahlias can bloom beautifully from summer all the way into winter.
Once you start cultivating dahlias and witness their first blooms, you'll likely find yourself enamored with them. To extend the blooming period of dahlias, let's explore the optimal times and techniques for deadheading these fabulous flowers, as shared by a seasoned dahlia expert.
Understanding Deadheading Dahlias
Deadheading dahlias entails removing the faded flower heads and buds, which encourages the plant to redirect its energy toward developing new blooms rather than producing seeds.
"Unless you're letting seedpods mature for breeding or seed collection, it's essential to remove spent blooms. This way, the plants can focus on producing more flowers," explains a leading flower grower. "Deadheading is crucial for maintaining a consistent display of beautiful blooms throughout the season."
Steps to Deadhead Dahlias
Before deadheading or pruning any flowers, make sure you have appropriate tools to prevent damaging the plants. "A sharp knife or pruning shears, like Fiskars soft grip pruners from Amazon, are essential for deadheading dahlias," advises a floral expert.
Once dahlias start to bloom, check them weekly for any wilting flowers. Remove any that are fading or have completely wilted and begun to form seed pods.
Identifying spent blooms becomes easier as you learn to deadhead dahlias. When petals start to droop and fall, you know it's time. If you miss this stage, it can sometimes be challenging to distinguish between spent buds and those still developing.
"It can be tricky to tell spent buds from new ones. The key is in their shape. A pointed, slightly squishy bud has gone over; a round, firm bud indicates new growth," says the expert.
After identifying which flowers to deadhead, use your pruner to cut the flower stem back to where it meets a leaf. This practice promotes new blooms and keeps stems looking tidy.
Timing Your Deadheading
The timing for deadheading dahlias depends on their blooming schedule, which varies by hardiness zone.
Once blooms start to wilt, it's a clear signal to begin deadheading. Aim to deadhead dahlias weekly to keep them flowering; during peak blooming season, you may need to do this every few days.
Deadheading Multiple Blooms on One Stem
Deadheading becomes a bit more complex when multiple blooms grow on a single stem. If one flower has faded, you can either cut it back to the bud joint, preserving the remaining buds, or trim further down to the next set of leaves.
"If the flower stems are short, I often cut the dahlia back further down the stem to encourage longer new shoots for a summer flower display. Cutting one of the three blooms from a short stem may not look appealing in a vase," says the expert. "However, if you're growing dahlias for color in the border for garden color schemes, this might not be a concern."
Keeping Dahlias Blooming
To maintain blooming, regular deadheading is crucial, along with cutting flowers for arrangements, which encourages further production.
"Dahlias, like all plants, can fall victim to diseases when stressed," warns the expert. Keep your plants healthy by choosing the right location, ensuring good airflow, and providing proper care and watering. When facing pests or diseases, "I recommend using organic methods whenever possible. Although it requires extra effort, growing naturally enhances flower quality," they add.
Dahlias are fantastic cut-and-come-again flowers, ideal for a cut flower garden since they bloom for months. Regular deadheading and harvesting these exquisite late summer flowers encourages them to keep producing vibrant blooms until the first frost.
