Zinnia Flower Care

 Tips for Successfully Growing Zinnias

Zinnia Flower Care-butterfly-and-bee-on-zinnia
Bee and Butterfly on Zinnia Flowers

Installing zinnias in your garden and landscape area is a creative way to create that color pop while encouraging wildlife ( butterflies and bees). Creating a garden paradise should be the desire of every homeowner, including zinnias can help to meet that goal, there are many varieties of zinnias. These garden beauties are native to North America and are a favorite of gardeners producing flower bloom in such abundance that it is eye-popping.

Zinnias are drought-tolerant plants that produce daisy-like flowers which sit atop a single stem, while the leaves are simply arranged opposite each other being oblong, lanceolate, or ovate in shape hairy dark green with veins that are prominent the flowers come in an array of colors ranging from white, red, pinks, green, purple, yellow, etc…

Zinnias are a must for the home garden so continue reading and see why zinnias have such a high score when it comes to making them a part of garden and landscape designs.

Planting Location

Zinnias perform well in the full sun which will promote flower bloom so ensure to install your zinnias under these conditions. When planning zinnias should be spaced 4-24 inches apart.

Soil Type

Zinnias can be installed in most soil types provided there is good drainage.

Watering Methods

The soil should be moist, not waterlogged which will keep your zinnias blooming nicely.

Fertilizing Methods

During the growing season fertilize your zinnias with triple ten or 10-10-10. Before applying fertilizers read and follow the manufacturers’ label for best results.

Garden insect pests of zinnias

Keep an eye out for these garden insect pests.

  • Aphids
  • Spider Mites
  • Scales


Aphids are tiny pared shape insects that cause damage by sucking the plant’s fluids turning the leaves yellow followed by leaf drop. Aphids are among the easiest garden insect pests to kill. A strong spray of water from a garden hose will knock them off your zinnias eliminating them however this strong spray of water can also break the leaves of zinnias.

The use of insecticidal soap will give good results or a homemade remedy that has proven to be effective is soap liquid and water. Add a tablespoon of soap liquid to a gallon of water shake well and apply to a 32 oz spray bottle. When applying this mixture get both the top and the underside of the leaves. Adjust the head or the spray nozzle so that this solution can come out fine and misty getting full coverage.

Coarse droppings will be ineffective. Allow this solution to remain on your plant for about an hour and a half and then rinse your zinnias with fresh clean water. Wait for seven days and if there are still signs of aphids then repeat the application and follow as was directed.

Spider Mites

Spider mites are very tiny but can cause huge damage to our garden plants, to know if your plants have spider mites look for spider web along with plants taking on a dusty appearance. What you can also do to further test your finding is to place a sheet of white paper under the plant’s leaves and gently shake or tap.

If it is spider mites you will see tiny specks or spots moving around on that sheet of paper and if the infestation is very server you will feel them crawling around on your hands. Spider mites also cause yellowing of the leaves followed by leaf drop apply insecticidal soap or horticultural oil to bring these garden insect pests under control.


Scales are tiny insects that affect garden plants, there are more than 6,000 species of scales that make this army so vast. These menaces can cause so much damage to plant life. The body of scales resembles armor and they remain in a fixed position on garden plants.

They cause injury by sucking the fluids or the sap from garden plants which can lead to yellowing of the leaves and leaf drop. To bring scale insects under control apply insecticidal soap or horticultural oil, before applying chemicals read and follow the manufacturer’s label.

Diseases of zinnias

These diseases can do a number on your zinnias so keep an eye out and treat them immediately.

Zinnia Flower Care-zinnia-flower-plants
Zinnia garden flowers
  • Alternaria Blight
  • Powdery Mildew
  • Stem and Root Rot
  • Bacterial Leaf Blight

Alternaria Blight

Alternaria blight appears as spots with grayish-white along with reddish-brown on the upper leaf surface as this disease persists the leaves will become dry and then turn brown. The blossom may also develop brown spots. This disease is encouraged by prolonged wet conditions. Avoid overhead irrigation and plant-resistant varieties.

Powdery Mildew

Powdery Mildew shows up as a white powdery coating on the plant leaves. Remove the infected leaves and spray the plant with neem oil to bring this problem under control.

Stem and Root Rot

These diseases appear as spots on the stem that is of various size near the soil level and on plant roots. Stem and root rot are encouraged by fungi, the color of the infected parts appears bright red, black-gray, and brown.

The roots will decay, there will also be wilting and dieback. Constant moisture, poor drainage encourage this disease, control measures may be difficult. The use of a fungicide as a soil drenched may offer some help, before applying fungicide read and follow the manufacturer’s label for best results.

Bacterial Leaf Blight

This disease is encouraged by overcast and rainy weather, bacterial leaf blight shows up as large irregular spots that show up on the leaf margin, the spots turn watery and then brown. The spots then develop a white to gray center, there is no known cure for this disease except to use proper cultural practices. The removal of foliage and debris from the plant bed during the fall months and disposing of, sanitize tools before pruning operations so that disease doesn’t spread and also avoiding water from splashing on to plants. Your zinnias should be watered from the soil or ground level.

Ideas on where to install zinnias

Here are just a few ideas on where to install zinnias.

1. Zinnias can be placed throughout a garden area in color masses.

2. Install them around the trunk of a tree.

3. Place them alongside a garden walking pathway.

4. Installing them in a pond area is really great.

5.  Grouping and growing them in color masses is a real show stopper.

Deadheading Zinnias

Deadheading zinnias is a great way to encourage flower production with an abundance of flower blooms. Flowers that are spent or faded should be removed by pinching or with a hand pruner. A word of caution, however, when removing or pruning back zinnias be careful not to remove too much of the plant’s leaves because your zinnias will fall back and die.

The final word

Zinnias are a must, these garden beauties can bring that much-needed color to your garden and landscape. Give your garden that color pop by installing these garden beauties. Zinnias are a garden plant that will work wonders for you as you create a garden paradise.


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About the author

+ posts

Norman loves being in the garden, both at home and for his job....
he is 'Natures Little helper' being outdoors, growing his vegetables and flowers from an early age.
Now having spent over 22 years in the profession he want to give some of his knowledge to others...
his vast array of hints and tips you will find scattered over this site will help you no end growing plants in your garden.

8 thoughts on “Zinnia Flower Care”

  1. Hi Norman, and thanks a bunch for this great article. I love zinnias, I have them all over my garden. They are beautiful flowers and I agree Zinnias are a must! I’ll be using all of your tips for my flowers, thanks to you. My zinnias are healthy right now but I’ll keep an eye on them to make sure garden insects stay away.

    Just one question: Which soap liquid do you suggest? Just a regular dishwashing liquid or something else?

    Thanks again, cheers

    • It is so good to hear that you are having success with your Zinnias. You can use any soap liquid but ivory soap liquid is preferred. So happy to help, all the best to you and have a good day.

  2. I feel refreshed after reading this article. A flower garden is something that I always wanted to have. I’m glad that I get to read your article on Zinnia flower care. 

    Your analysis is in depth and comprehensive. Even a newbie can understand this information very easily. BTW, which season is best to plant them? Summer or winter? Our, both are equally good! 

    Thanks a lot for sharing this amazing information. I found it very useful and very much look forward to more of such articles. 

    • Hello so happy to help, Zinnias dose well in the full sun so summertime is best.  Wishing you all the best and have a good day.

  3. Very interesting article. I am not an expert of flowers or gardening – I was able also to kill a cactus – but I think it is always nice to have a house with some flowers, especially colored flowers. It gives the space a different, more welcoming, sensation. 
    Flowers are living being, and they can be very sensitive, so it is important to take good care of them, treat them well. Not all of them need just a bit of sun and water. 

    Thank you for the blog.

    • You are welcome and I am so happy that I could help, plants do have their place in the garden area and they offer so many benefits.

  4. Hi Norman thank you for sharing this knowledge. To be honest I’ve learned a lot from your posts, thank you. I’ve never known how to maintain and take care of the garden and especial the zinnia flower so well from the spider mites, scales or any other bacteria. The article is very educational and informative. Thank you.  Unfortunately I do not have any experience with the topic as my niche is another field. My question is which insecticide (spray) do you think is the best to kill these bacterias and at the same time is convenient too?

    • Hello I am so happy to help and thanks so much for those kind words, Bacillus thuringiensis or Bactericide such as 
      IndiaMARTBacteriplus, Phyton 27 2 Oz, etc… are just a few you will find on the market, hope this helps.


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