All That You Need To Know About Zinnias


Emma DowneyByEmma Downey
Updated on 8/13/2022

How to Sow, Nurture, and Look After Zinnia Plants and Flowers.

Zinnias are among the simplest flowers to cultivate because they have a rapid growth rate and abundant blossom production. In addition to this, they will continue to produce flowers right up to the first frost, which is very harsh in the fall. Consider planting some zinnias in your garden this year so that you may take advantage of the tremendous amount of color they can provide to the space.

Regarding Zinnias

Zinnias are classified as annuals, which means that they only live for a single growing season and produce both blooms and seeds during that time. However, the original plant does not survive until later years. They feature colorful, solitary flower heads that resemble daisies and grow on a single, upright stem, which makes them ideal for use as a cutting flower or as food for butterflies.


Varieties of Zinnias

Zinnia Elegans, the most common species of zinnia, is the one that has been cultivated to generate the most significant number of distinct zinnia variations.

Single, semi-double, and double flowers are the three primary classifications of zinnia flowers. The number of rows of petals and whether or not the flower's center is visible are the primary characteristics that differentiate these two types of flowers:

  • The petals of a single-flowered zinnia are arranged in a single row, and the flower's center may be seen.
  • Zinnias with double flowers have an excessive number of rows of petals, and the centers of their flowers cannot be seen.
  • Zinnias that have semi-double flowers have multiple rows of petals, but the flower's center may still be seen between the petals.


In addition to these varieties, zinnia blooms can also come in a variety of shapes, such as "cactus," "beehive," and "buttons." The plants themselves are available in a range of heights, with the taller kinds being more suited for the background of a garden bed and the shorter forms being better suitable for use along a border. There is, in point of fact, a zinnia variety suited to each and every garden.

Zinnias are perfect for growing in an annual or mixed border garden. Zinnias of a smaller size are ideal for use as an edger, in windowboxes, or in other kinds of containers.


It is vital to select a position that receives full sun, which means between six and eight hours of sunlight each day if you want to have a lot of blooms throughout the season. In addition, selecting a location that has adequate air circulation will assist in the prevention of foliar diseases like as powdery mildew later on in the season.


Zinnias have the ability to thrive in almost any type of soil, but the ideal ground for them is one that is high in organic matter and has good drainage. The pH of the earth should ideally fall somewhere between 5.5 and 7.5. If the soil is improved by adding compost (humus), the flowering plants will develop at a faster rate. Get more information about amending the soil and preparing the ground for planting.

When Should Zinnia Seeds Be Planted?

  • Due to the fact that zinnias do not like to be transplanted, it is recommended that you start your zinnia plants from seed directly in the garden bed. If the conditions are right, they will grow from seed to adulthood very quickly.
  • Note that zinnias can be started from seed indoors if that is more convenient for you; make sure to transplant them while they are still young and handle them with care.
  • Because zinnias cannot tolerate frost, you should wait to plant their seeds until after the danger of frost has passed in your region. Check the frost dates in your area.


  • Zinnias have a minimum daytime temperature requirement of about 60 degrees Fahrenheit (16 degrees Celsius), though a range of 74 to 84 degrees Fahrenheit (23 to 28 degrees Celsius) is preferred for optimal growth.
  • To extend the amount of time between flowering, sow a new round of seeds once every week or so for several weeks.

How to Get Zinnias Started

  • Depending on the variety, leave anywhere from 4 to 24 inches of space between each plant. (Plants of wide, broad common types are spaced at an interval of six inches within the row and two feet between rows.) Advice that is specific to the array can be found on the back of the seed packet.
  • Zinnia seeds should only be planted about half an inch deep.

  • In just four to seven days, for the majority of zinnia varieties, you'll see the seedlings emerge, but it could be anywhere from several weeks to a couple of months before the flowers appear (depending on the planting site and climate).
  • And just When the seedlings have reached a height of three inches, they should be thinned out and spaced between six and eighteen inches so that there is optimal air circulation. Because of this, the likelihood of powdery mildew developing is lower.



  • To encourage the most development and flowering, keep the soil moist but not soggy and use only a trace amount of fertilizer.
  • After the zinnias have finished flowering, you can encourage more flowers to form by "deadheading," which means cutting off the spent flowers.
  • Zinnias are annuals, which means that they won't survive the first severe frost of the fall. Let the last flowers of the season mature to their full potential, and then scatter the seeds after they have done so if you want them to reseed themselves.

Are you still on the fence about zinnias? Consider using them in your garden for the following six reasons

6 Reasons to Grow Zinnias

  • With cultivars from the Dreamland Series, you can achieve a full-sized flower on a more compact plant. These zinnias are dwarf and compact, with fully double flower heads that can be up to 4 inches across and come in a wide range of colors. The stems can grow to be anywhere between 8 and 12 inches tall.
  • The cultivars in the Thumbelina Series are small and spreading. They have single or semi-double flower heads that are resistant to the elements and a variety of colors. Their petal diameters measure 1-1/4 inches, and their stem lengths can reach up to 6 inches.
  • The State Fair Series is one of the largest and tallest of them all, with large, double flower heads that are 3 inches across in diameter. These flowerheads are a total of 6 inches across. The height of the stems can reach up to 30 inches.



  • From seed to flowering, zinnias typically require between 60 and 70 days. They are fantastic for use in flower arrangements!

Wisdom And Creativity

  • Zinnias with small, pointed leaves are perfect for growing in hanging baskets, and they also make beautiful dried flowers.
  • It is said that zinnias represent thoughts of friends who are no longer present. 


  • Zinnias are susceptible to bacterial wilt, fungal and bacterial spots, powdery mildew, and powdery mildew. In order to prevent disease, you should try to keep the foliage from getting too wet as much as possible.
  • In addition to that, problems can be caused by caterpillars, mealybugs, and spider mites. Spraying should be avoided unless there is a significant infestation, as minor leaf damage does not pose a problem.
  • Zinnias, on the other hand, are resistant to being eaten by deer, which means they can protect nearby flowers from being consumed.