Zinnia Vs Dahlia: Choose A Perfect Flower For Your Garden

Do you know the difference and similarities between dahlias and zinnia? Discover Zinnia Vs Dahlia, the key differences between zinnias and dahlias as you read ahead.

If you are fond of plants, you probably know the amazing effect they have on people. Planting dahlias and zinnias is an enjoyable experience.

However, identifying them both for their differences is a must.

Zinnia Vs Dahlia Differences and Similarities
Dahlia Vs Zinnia

What Is A Zinnia Plant?

Zinnia belongs to the Asteraceae family. Some other plants that belong to this family are daisy, dahlia, aster, sunflower, ad chrysanthemum.

This plant is known for its bright and lovely flowers that consist of many petals. These flowers are found in different color shades like reds, oranges, pinks, purples, and oranges.

Zinnia plants are commonly native to the Southwest of the United States. However, it is not hard to grow zinnia plants anywhere.

They also attract butterflies, ladybugs, and hummingbirds.

These plants are admired by gardeners due to their resistance to hot weather, and easy plantation of the Zinnia seeds.

The name Zinnia is due to a popular German botanist who was named Johann Gottfried Zinn.

300 Zinnia Seeds - Purple Prince'- Butterflies And Hummingbirds love them !

Fun Fact about Zinnia:

In 2016, there was a Zinnia plant that managed to blossom in zero gravity. It was on the International Space Station, and yet it blossomed. It was the first flower ever that grew in space.

What Are Dahlias?

Dahlia is part of a family named Asteraceae. Dahlias have lovely cut flowers and thrive in moderate and moist climates.

Unlike zinnias, dahlias do not grow well in very hot climates. These plants help brighten up a garden. Dahlias are known as tender perennials and are also found in the much colder climates of North America.   

ReadWhat To Plant With Zinnias

You can take them indoors so that they can survive the chilly winters in a better way.

  • Dahlia flowers are found in many colors. They are commonly found in various sizes that extend from 2 inches to massive 15 inches of bloom.
  • Plantation of the Dahlia seeds is very easy and can be low maintenance.
  • Many varieties of this plant also grow up to four to five feet in length. Some dahlias also grow as ornamental flowers. They have forty different species of flowering plants.
  • Dahlia flowers possess colors like white, purple, red and yellow, and so forth Their wild species also consist of ray flowers and disk-like flowers that are fitted with flowering heads.
  • Dahlias tend to grow well in most soils. Their time to begin flowering starts in the late summer season, and the flowering continues until it has interruptions by the time of autumn frost.
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Clearview Debbie Dahlia - 5 Gallon Size Bare Root Tuber

are zinnias and dahlias the same?

At first, they look exactly the same, but later you may notice some changes.

They both belong to different flower families and have different colors, looks, and sizes. but both Zinnias and Dahlias originated in Mexico and North America.

Both are available in many colors like red, pink, yellow, and tomato. But zinnias are bigger flowers than dahlias.

Along with that, they have different care, requirements, and seasons for blooming. Now let’s find below more differences.

The Key Differences Between Zinnias And Dahlias

There are some important key differences between zinnias and dahlias.

Both these flowers belong to the family of sunflowers and have a similar look. They have blooms that are made up of a lot of smaller flowers that come together to form a larger head.

Due to the appearance of dahlias and zinnias, many people think of them as the same. However, there are some differences that can set them apart.

Some key differences between zinnias and dahlias are mentioned below.

1The flower of zinnias has a diameter that expands up to seven inches.The flower of dahlias has a diameter that is as large as fourteen inches.
2Zinnias have more of dome-shaped.Dahlias are more inclined towards a flatter shape.
3Zinnia blooms are in colors ranging from white, off-white, yellow, lilac, gold, pale green, red, orange, and purple.  Dahlia blooms are in several different colors, like purple, yellow, pink, orange, and red.  
4The height of zinnia plants usually ranges between six inches and fifty inches.At the minimum, these plants would grow to an average length of one foot. However, that is not all. These plants can extend up to six feet in length, which can be a source of differentiation for them.   

1. The Size Of The Flowers Can Be Different

If you take a look at both flowers, you may get confused between them. The first sign that indicates a difference between both is the size of the flowers.

There are a lot of sizes when it comes to dahlia flowers. Zinnias have a lot of varieties in size, too; some are larger than others, while some are smaller.

You can look at the diameters of the flowers to know the difference between them. The zinnia flower has a diameter that can be as large as seven inches in total.

If you want huge flowers, you can go for a wide variety of dahlias. While zinnias have a large bloom, they have a bigger bloom due to their fourteen-inch diameter.

2. The Flowers Have Different Shapes

At first sight, dahlias, and zinnias may appear to be the same. However, as you look at them properly, you may learn of the difference in the shape of their flowers.

Zinnia flowers possess a more diverse shape than dahlia flowers. While the flowers of dahlia are larger and flatter, Zinnias possess a dome shape.

There are a few dahlia flowers that are almost shaped like a ball – however, they are flatter than the zinnia flowers.

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When you first see both flowers, they may seem similar to each other.

The flowers of both plants – zinnias and dahlias–are absolutely stunning to look at, so you can not go wrong with either of them.

3. The Flowers Have Different Colors

Both dahlias and zinnias share many colors. However, there are many important differences between them.

Dahlia blooms are in several colors like purple, yellow, pink, orange, and red.

With zinnias, you may find them in colors ranging from white, off-white, yellow, lilac, gold, pale green, red, orange, and purple.

You will find different colored zinnia blooms, except black, blue, and brown. So, you can notice which plant it is with the help of the colors of the blooms.

If you want multiple color options, you should opt for zinnias. However, both flowers are exceptional in their own ways and bloom gorgeously.

4. The Difference In Height

When you are differentiating between dahlias and zinnias, you can do that with the help of height. These plants are based on different sizes and can be distinguished on the basis of that.

The height of zinnia plants usually ranges between six inches and fifty inches. On the other hand, dahlia can go taller than that.

At the minimum, these plants would grow to an average length of one foot. However, that is not all. These plants can extend up to six feet in length, which can be a source of differentiation between them. 

The taller plants of zinnias blossom huge flowers, too. The flowers of such plants would be much larger than the zinnia flowers.

Anyone who is in search of massive blooms can easily opt for dahlias. However, if you want smaller and more delicate flowers at your disposal, then zinnias can work like a charm for you.

5. dahlia vs zinnia leaves

Similarities Between Zinnia and Dahlias

While they have their differences, the flowers of dahlias and zinnias are quite similar in many ways too. Both of these plants belong to the Asteraceae family.

The blooms of these flowers are combined together to form a huge flower head. These flowers possess petals that fall outwards and expand like the sun’s rays.

The flowers located in the central areas are disc-shaped. However, there is an absence of disks in some of these flowers.

Dahlias and zinnias have bright colors and various flowers, too.

Both plants help in making good bedding plants. They are also great for edging and borders and are excellent cut flowers.

1. The Arrangements of Petals and Flowers

Zinnia and dahlias possess different varieties that have double petals, single petals, and semi-double petals.

In the semi-double petals and the single ones, the center part of the flowers is prominently visible. However, you can not see the center in the double flowers.

Dahlias have petals and single and double flowers. The semi-double and double-flowering petals bear a higher rate of petals than those belonging to the single petals.

2. The Various Colors Of The Flowers

Zinnias tend to blossom in pure colors. The others usually have a combination of different colors while blooming.

  • On dahlias, striped flower petals are quite a common occurrence.
  • Dahlias blossom in shades of pink, purple, orange, yellow, and orange.
  • They are not found in blue color at all. On the other hand, zinnia flowers possess the colors gold, pale green, orange, purple, red, off-white, pink, lilac, yellow, or white.
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Zinnia is also not found in blue. However, there are more colors that they do not appear in – black and brown.

3. Shapes Of The Flowers

The basic outlines of both of these flowers are diverse.

Some shapes are more towards the circular side, while some are inclined dome-shaped and ball-shaped. While some dahlias possess ball-like shapes, they are flatter.

While they have similar outlines, their shapes may vary, with dahlias being flatter and zinnias being more dome-shaped.


The beautiful, brightly colored plants are a great addition to any garden.

You can opt for one of them as they are quite beautiful to look at.

With their gorgeous appearance and stunning colors, they can catch the attention of people quite easily.

zinnia vs Dahlias FAQS

Q: Are Zinnias The Same As Dahlias?

Zinnias and dahlias belong to the group of sunflowers.

They have some physical similarities. However, they are completely different when it comes to the flower parts.

Q: Is There A Plant Similar To Dahlias?

Flowers that look similar to dahlias are, double chrysanthemums are quite similar to dahlias.

Q: Flowers that look similar to Zinnias?

There are many types of flowers that look similar to Zinnias. Some might be familiar such as Marigold, Chrysanthemums, Roses, Daffodils, and Thistles.

Additionally, some new flower families have been developed specifically for the looks of Zinnias and other species of lily.

Q: How do I identify dahlias?

Dahlias are a type of flower that typically have blue or purple flowers. They are also often called “The Flower of the Field.”

Flowers come in many colors, but blue and purple are the most common. They can be found growing in areas with a lot of rainfall.

Q: do zinnias come back every year?

Yes, according to some gardeners, this perennial has the propensity to come back every year.

Q: Are zinnias in the dahlia family?

Zinnias are a member of the dahlia family. This family has many different types of flowers that can be found in nature.

Some of the most common zinnias are the lily and dahlia.

Q: How long will zinnias last?

Zinnias are a type of lily that can last up to 12 years if kept in a standard pot or vase. Proper care for zinnias will ensure their longevity.

Q: Will zinnias multiply?

Zinnias are a type of lily that can multiply. They are native to North America and typically grow in areas with warm weather.

The flowers bloom from late summer to early fall and can reach up to 25 inches in height.

Q: What happens if you plant zinnias too close together?

If you plant zinnias too close together, the plants may not get enough light and may die soon.

Q: What month do you plant zinnias?

Zinnias are a type of lily that are typically grown in the month of May.

Q: How do I keep zinnias blooming all summer?

If you’re looking to enjoy beautiful zinnias all summer long, there are a few things you can do to keep them blooming.

Here are some tips:-

1. Water zinnias regularly during the early morning and late afternoon when they are least active and when they need the most water.

2. Zinnias get thirsty during the hottest part of the day, so watering at these times will give them plenty of water to drink.

3. Make sure your zinnias have plenty of fertilizer every other week or so.

4. Fertilization helps plants grow tall and healthy, and it also makes zinnias look their best.

Q: Do zinnias do better in pots or in the ground?

Zinnias (Littonia zinnii) are one of the most popular plants for potting. They do well in a pot, but can also be grown in the ground.

The key to success with zinnias is to choose soil that is healthy and has proper drainage.