Dahlias: What I Learned Planting 38 Dahlias in a Brand-New Garden

When I decided this neglected patch of dirt needed to become a cottage garden, apparently I did not believe in easing into things.

I planted 38 dahlias.

Because why learn one lesson at a time when you can learn 38 of them simultaneously?

I planted them in three loose drifts rather than straight rows: 11 on one side, 11 on the other, and 16 through the center. I wanted the garden to eventually feel old-fashioned and informal rather than like a miniature flower farm.

What I didn't fully appreciate was just how much support dahlias need.

Supporting Dahlias Without Ruining the Cottage-Garden Look

Dahlias eventually become tall, top-heavy plants carrying flowers that behave a little like tiny umbrellas during a storm.

Floret recommends installing sturdy support before the plants become large enough to topple. Individual plants can be staked, while larger plantings can be surrounded with stakes and twine to create a supportive corral.

I wanted something a little prettier, so I used 4-foot bamboo stakes and twine, crossing some of the bamboo into simple X-shaped supports.

Right now there is considerably more bamboo than dahlia.

I'm trusting the process.

As the plants grow, they'll fill the framework and the bamboo should mostly disappear into the foliage.

Pinching Dahlias

Another lesson I learned was that cutting part of a perfectly healthy plant off can actually make it better.

Once dahlias reach roughly 8–12 inches tall, Floret recommends removing the top 3–4 inches just above a set of leaves. This encourages the plant to branch and ultimately produces more flowers and stronger stems.

It feels completely counterintuitive the first time.

You spend weeks trying desperately not to kill the plant and then gardening advice basically says:

"Great job. Now cut its head off."

But pinching encourages multiple stems instead of one dominant stalk.

Don't Panic Over Every Ugly Leaf

My newly planted dahlias also developed yellowing lower leaves, little holes and some brown spots.

Naturally, you may assume everyone was dying.

In reality, newly transplanted plants can look pretty unimpressive while they establish themselves. I removed badly damaged lower foliage, watched the new growth, protected the young plants from slugs and concentrated on consistent watering rather than reacting to every imperfect leaf.

Floret specifically warns that slugs and snails love tender young dahlias, so early protection is worthwhile.

The most useful thing I've learned is to look at the plant as a whole.

New green growth matters more than one ugly bottom leaf.

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The August Reality Check

By August 4, the garden still looked nothing like the overflowing cottage garden living inside my head.

Some dahlias were noticeably stronger than others. A few were still tiny.

But they were growing.

And that's something I'm learning about building a garden from scratch: the first year isn't really about creating the finished garden.

It's about establishing it.

The flowers are learning the garden.

And apparently I'm learning right along with them.