Here's a detailed article about the different species and types of zinnias for your garden. Includes history, main types, common species and more.
You might not hear about them on the regular, but Zinnias are one of the most popular and most liked garden plants out there. They are available in a variety of dazzling colors, which is what makes them so popular. They are the easiest annual plants to grow. They require very little from the gardener and give so much more. Zinnias can be grown anywhere. They are quick to grow and grow out to be beautiful.
Zinnias are a member of the Asteraceae family and are closely related to daisies. They have over 20 species that differ on their characteristics. 10 of the Zinnia species are garden flowers, but the most popular garden species is the Zinnia elegans.
History of Zinnia
Zinnias are native to Mexico, where they grow with a color that falls between orange and yellow. However, some varieties of wild Zinnias have been found as south as Guatemala and as north as Colorado.
Zinnias were first discovered in Mexico After which they were brought to Europe in the 1500s by the Spaniards. The Zinnia that was initially brought to Europe was Zinnia peruviana, which was quite ugly and unattractive to look at. It produced small flowers and was sparsely foliated. The petals were an unpleasant muddy shade of orange and yellow. By mid-1600s, it became well known throughout Europe, but because it was not a pleasing sight, it was not cultivated much. The first description of Zinnia was written by Dr. Johann Gottfried Zinn in Germany, and hence, the plant has been named after him.
It is believed that a Zinnia was brought to Europe in 1796 by way of Brazil. It was after it was presented to the great Swedish scientist and a doctor, Linnaeus. This Zinnia was labeled as Calthe de Bresil, which means the Brazilian marigold. This was Zinnia elegans, the Zinnia that the world fell in love with. This is the specie of Zinnia from which all present-day Zinnias have been developed.
Zinnia elegans produced larger and lusher flowers in colors ranging from crimson to pale lavender. The first Zinnia seed was offered for sale to public in 1798 in the United States. Americans did not show a very keen interest in this plant initially. It was the French who were showing significant interest. By 1856, the French had developed truly double forms of Zinnia elegans.
It was after this that Great Britain and Europe started to show a fondness for and demanding the double-flowered Zinnias. By 1864, red, purple, orange and salmon colored Zinnias made their way to North America and became a part of American gardens.
The first dwarf variety of Zinnia, Zinnia haageana made its way to the United States from Mexico during the early 1860s. Henry A. Dreer, the Philadelphia seed house had started offering seeds of this variety for sale to the general public by 1876.
The most profound and prominent development for Zinnia occurred when a beautiful mutation was found by John Bodger from Bodger Seeds Ltd. He saw a natural mutation in Zinnia in a field of Mammoth Zinnias. The mutated Zinnias had relatively huge flowers, and the number of petals were incredible. The variety appeared stable, and the plants were quite robust. A strain of this mutated Zinnia was developed, in order to spread it across the countries. They were called the ‘California Giants’. These Zinnias were introduced to the world in the 1920s. Great Britain, America, and Europe were enthralled by the spectacular colors and the lovely flowers.
Currently, we have more than 20 species of Zinnia that are known. The only species that are commercially available are Zinnia elegans, Zinnia haageana, and Zinnia augustifolia.
Table of Contents
Types of Zinnia Flowers
There are four types of Zinnia flowers. The types depend on the rows of petals in a flower. Zinnia flowers come in a variety of colors including pink, red, purple, orange, yellow, lavender, white and even green. The only color Zinnia flowers are not available in is blue.
- Single Flowered
Single-flowered Zinnias have a single row of petals. The center of each flower in this type is exposed.
- Semi-Double Flowered
The flowers in this type have several rows of petals. The center of each flower is exposed and visible.
- Fully Double Flowered
The flowers in fully double flowered zinnias have several rows of petals, and the center of each flower is not visible; it is hidden in petals.
- Cactus Flowered
The flowers of Cactus flowered. Zinnias are long. Each petal rolls towards the underside, as a result of which the entire petal twists to form a unique flower.
Zinnias are divided into different types based on their size and spread. They range from compact miniature type to tall cutting type. The Zinnias are divided into two main types, which are upright and tall with large flowers and those that spread with small flowers. There is also a third type which are a mix of the two main types.
Garden Zinnia (Zinnia elegans)
Garden Zinnias are disease susceptible. They are the parents of a number of beautiful varieties. They are well known for the lavish variety of large flowers that they produce. Garden Zinnia plants can range from 6 to 60 inches in height. The leaves of these type of plants are bristly oval.
Garden Zinnia includes the following choices of flowers:
- Lilliput Mix: these are about 2 feet tall with doubled flowered type flowers. Each flower is about 2 inches wide.
- Thumbelina Mix: these are miniature types which are usually 6 to 10 inches tall.
- Sunbow Mix: these are about 24 to 30 inches in height. Each flower is 1 to 2 inches in width.
- Lollipop Series: the plants that lie in this series are about 10 inches tall.
- Ruffles Series: the plants in this series are flashy in appearance and are about 24 to 30 inches tall.
- Giant Flowered Mix: these are disease tolerant types which can be 40 to 50 inches tall. Their flowers are usually an amazing 5 inches wide.
Spreading Zinnias (Zinnia augustifolia)
Spreading Zinnias are heat and drought tolerant. They are capable of resisting common foliar diseases. They are usually short and small plants ranging from 8 to 18 inches in height. Their flowers are relatively small as well, ranging from 1 to 2 inches in width. The variety of flowers in Spreading Zinnias is not as wide as in Garden Zinnias. The flowers are yellow or orange with dark centers. Their leaves are slim and lance-shaped. This type of Zinnias can be hanged in baskets. They can serve as attractive annual ground covers or can be planted at the front of a border.
The most varieties of Spreading Zinnia are:
- Star Orange
- Star Gold
- Crystal White
Since they have shorter stems, they are not as good for cutting as Garden Zinnias.
Interspecific Crosses are a result of cross-breeding Garden Zinnias and Spreading Zinnias. They have the flower variety of Garden Zinnias and the durability of the Spreading Zinnias. They are a low maintenance type of Zinnias.
- Rose Pinwheel: it is the most popular variety in this type. It is mildew resistant. The single flowered type flowers are about 3.5inches in width. The plant is usually 12 inches tall. The flowers in the Pinwheel series are of numerous colors, including white, pink on white and gold.
- Profusion Series: the flowers are about 2 inches wide. The plant is about 15 inches in height. There is no need to deadhead these plants as the new leaves and buds cover the old flowers naturally.
The three qualities that a summer plant should have are: they should be low maintenance, they should be heat and drought resistant, and they should be a brilliant color. Zinnias live up to all three qualities.
Zinnias are annual plants, which means, they will flower only during one season only. Planting Zinnias is not much of a challenge. They require minimum care and maintenance. They are adaptable plants. However, below you will find some tips that can help you grow great Zinnias.
- Sow seeds only when the last frost has passed. Zinnias grow in warm weather. Cold temperature causes them to die out. Zinnias are summer flowers.
- Choose a location where your plants can receive direct sunlight. Day time temperature of 74 to 84 degrees Fahrenheit are favorable.
- Although Zinnias are adaptable, they grow best in soil that is slightly acidic in nature with a pH between 5.5 and 7.5. The soil should be well drained, humus rich and fertile.
- The seeds should be sowed only ¼ inches deep.
- Each plant should be spaced at least 6 to 24 inches apart. Mostly, they are planted 6 inches apart within a row with each row being 2 feet apart.
- Zinnia seedlings grow in about 4 to 7 days after seeding. When the seedlings are 3 inches tall, they are thinned such that they are 6 to 18 inches apart. This is done to maximize air circulation.
- For a longer flowering display, sow the seeds in succession.
Taking Care of Zinnias
Zinnias are fast growing plants. However, if you feel the growth is slow, or the leaves appear pale green, you can address the issue on time. Fertilizing with a controlled release or a soluble fertilizer can solve your problem. A fertilizer with low nitrogen is the most suitable.
Cut flowers normally last a week or more. The flowers should be harvested when they are fresh and fully mature. The right time to harvest Zinnia flowers is when pollen formation begins.
The primary troublemaker for Zinnia is mildew. When the weather is warm and humid, Zinnia plants are usually attacked by mildew. The plants become disfigured and eventually die. The spread of mildew can be slowed down by spraying the plants with a solution made using baking soda. It serves as a protective layer for the plants and keeps them from dying.
Why Should You Plant Zinnias in Your Garden?
There are numerous options for plants that you can have in your garden so why should you choose Zinnias over others? Below are the reasons why Zinnias should are a must in your garden!
- Zinnias are extremely easy to grow. They are low maintenance. With little time and attention, they can grow to give beautiful flowers in a wide range of colors.
- Zinnias are a great source of nectar for pollinators like butterflies and honeybees. Zinnias attract a lot of butterflies.
- Zinnias are a top companion plant. They can be grown with Zucchini, dwarf beans and chard.
- They are cut flowers, which is why they last a very long time.
- The colorful, edible petals add colors to any salad.
Zinnias and Children
Zinnias are the best option to plant if you are trying to instill a love for gardening in your child. Since they produce a seedling in just 4 to 7 days, your child will not have to wait for too long. Also, once the flowers are produced, the dazzling colors would automatically make your child want to garden more. A plant that takes too long to grow would make your child lose his interest. This is another reason why you should plant Zinnias in your garden.
There are no plants that grow as fast and as beautiful as Zinnias. Zinnias give you so many reasons to love gardening and flowers. Zinnias not only look great in your garden but they make breathtaking indoor decorations as well.