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What do Daylilies Need to Grow Well

Updated on July 10, 2014

My Daylily Garden

My Daylily Nursery in Australia
My Daylily Nursery in Australia | Source

My desire to have a spectacular flower garden

After enduring a couple of disappointing seasons of flower gardening, I needed a breakthrough. My desire to have a spectacular flower garden surpassed any other need. This compelled me to embark on a task of gathering facts about different types of flowers in Australia. Interestingly, this mission wasn’t as easy as I had imagined. With the growing number of flower experts in Australia and on the Internet, it was rather laborious to compare facts from each of them.

However, I don’t regret a single moment that I spent searching for knowledge. It was after this long journey that I decided to share my experiences with other flower enthusiasts who may be having the same problems I encountered as an apprentice in flower farming. As I searched for details about different types of flowers, I came across a flower expert who provided some groundbreaking facts about daylilies. Initially, I hadn’t developed any interest in this breed of flowers, as they appeared to be somewhat sophisticated.

I always viewed them as a category of flowers that require too much care. However, the article I came across on the Internet contradicted my attitude towards daylilies as it provided detailed analysis of these flowers highlighting their benefits and drawbacks. If you were looking to create a flower garden in your property, I would advise you to consider planting daylilies. Apart from giving your property a facelift, there are other essential benefits that come with these flowers.

A Daylily called Larry's Obsession
A Daylily called Larry's Obsession | Source

Essentials of Daylilies

The first and the most important thing I’ve learnt about daylilies is that just like most flowers daylilies love sunlight. Expose your daylilies to the sun for a minimum of six hours and they will flourish admirably. Nevertheless, the results you get from such exposure vary with the environment. For instance, in certain environments your flowers will demand a lot of sunlight, while in others they will require protection at a particular time of the day, mainly at midday.

Researchers have discovered that daylilies thrive more in the South and in USDA Hardiness Zone 4, which covers part of the coastal Queensland, Shark Bay, and Geraldton on the western part of Australia. I’ve also learnt that the amount of attention you give to your daylilies determines how well they flourish. I would advise you to prepare your garden properly before planting the daylilies.

While these flowers may not be adversely affected by factors such as pH, they require soil that is well fed with organic substances such as organic manure, compost, and rotten leaves. They also require enough moisture to ensure they are always nourished. I should also mention that daylilies have plump roots that enable them to store enough moisture for the dry season.

Therefore, I do not require a lot of water to keep my daylilies flourishing even in dryer seasons. Nevertheless, this does not restrict you from providing the flowers with adequate moisture. The more water I give to my daylilies the better the quality of flowers I get. If I do not have adequate water supply, I employ reliable moisture retention methods such as mulching. This doesn’t give me problems since I use light organic substances such as shredded leaves and grass.


Common Pests and Diseases that Affect Daylilies

Daylilies have shown great resistance against common pests and diseases. But yet, you don’t need to invest a lot in chemicals. However, I’ve analyzed a few damaging elements that you need to be wary of.


The following are some of the most common pests that attack daylilies in Australia.

  • Aphids: There is a special breed of aphids that feeds on daylilies alone. Unfortunately, this type of pest is hard to deal with. Other types of aphids can easily be eliminated with soft controls such as soap. But with daylily aphids, you need a pesticide with a mild systemic action. Never use Kelthane as it can easily damage your daylilies.
  • Spider Mites: These pests are active during hot and dry seasons. You can easily get rid of these spider mites by washing them off. Again, stay away from Kelthane as it damages daylilies easily.
  • Thrips: There are various types of thrips that heavily infest daylilies. You can control them by spraying your flowers with the right pesticide right from the early stages of their growth.
  • Snails: Snails eat the young, soft tissues, causing frayed edges and cracks. You can control them with pesticides and keeping your garden tidy.


Bad farming practices and the surrounding environment play the greatest part in the advancement of diseases in daylilies. As a beginner, you should start with the types of daylilies that have already been tested in a broad variety of environmental conditions. Here are some of the most common daylily diseases.


  • It is caused by Puccinia hemerocallidis
  • Causes orange and yellow powdery marks on plant
  • The leaves will eventually die but the entire plant will survive
  • Avoid exposing your daylilies to excess nitrogen
  • Make sure the plants get enough air and potassium
  • Use the right fungicides

Rotten roots and crown

  • Plants develop a yellowish color and might die eventually
  • The disease involves different factors such as nematodes, fungus, bulb mites, and bacteria
  • Ensure there is enough air circulation and moisture
  • Avoid using excess fertilizer and over amending
  • Don’t plant your daylilies too deep

Leaf Streak

  • It is caused by Aureobasidum Microstium
  • Daylilies develop brown spots, die-back of plant life, yellow streaking
  • Use the right fungicides to treat your daylilies

Spring Sickness

  • Causes the plant to twist, bend, stunt and to develop discoloration
  • The infected fans might die complete but new ones will blossom with time
  • The main cause of the disease is not known

In order to have healthy daylilies in Australia, there are several essential factors you have to bear in mind. Firstly, choose the right cultivars that can withstand different pests and diseases. Secondly, learn how to plant and take care of daylilies. Thirdly, seek more information from trusted daylily experts.


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