Surprise! Now’s Actually the Best Time to Plant These Iconic Fall Flowers
When you think of chrysanthemums (or “mums”), you probably think of the basic pom chrysanthemums that are everywhere in the fall: shrubby plants with blooms in autumnal shades of orange, yellow, and red. These so-called “garden” mums are affordable nursery finds that are well suited to seasonal flower displays — let them live outside until the first hard frost kills them, then toss them in the trash (or ideally, the compost pile). They’re justifiably well loved and widely used, but they’re just a small sample of the wide variety of chrysanthemums you can grow yourself.
Chrysanthemums are fall-blooming perennials that are extremely resilient and easy to grow, making them the perfect fit for any kind of gardener. And they aren’t just for setting on your porch for fall! In fact, if you want a really special display of chrysanthemums this year, spring is the time to get planting. Here’s what you need to know.
What are chrysanthemums?
Chrysanthemums, universally called “mums” for short, are popular fall-blooming perennial plants that are native to northeastern Europe and Asia, but are naturalized on a global scale. While these plants have been traced way back to the 15th century, they’ve continued to grow in popularity over the years with over 20,000 cultivars in current existence.
Chrysanthemums are generally used for ornamental purposes but some varieties are used to make chrysanthemum tea, which is popular in China. There has been a recent resurgence of heirloom varieties that have become very popular in cutting gardens because of the bloom’s long vase life.
When should I plant my mums?
Even though mums are late summer, early fall blooming plants, it’s best to plant them in the springtime. It’s easy to get caught up in the last-minute fall mum-buying craze, but if you want mums to be a perennial fixture in your garden they need to be able to establish their roots before the cold of winter sets in.
Planting chrysanthemums in the fall doesn’t give the plants enough time to root down in their new spots, causing them to struggle to adapt to cold temperatures. If you’re only in it for the fall decor it’s not going to matter — but if you want to make a solid investment in these beautiful, easy-to-grow perennials, plant them in the spring.
Where should I plant my mums?
Mums should be planted in partial to full sun. If you’re trying to decide between the two light exposures, always choose full sun for mums. This helps the plant maintain its energy during the blooming cycle as well as produce new buds, which is important if you want to see color up until the first hard frost. Generally mums do not like shade, though there are a few shade “tolerant” varieties that you can find if you look hard enough.
Can I plant chrysanthemums from seed?
Technically yes, you can grow mums from seed. However, the process can take four to five months and can be very hit-or-miss when it comes to success. Most of the mums you see at the nurseries are grown from cuttings.
If you are an experienced gardener and enjoy the process of starting seeds in the winter, you can definitely try your hand at growing mums from seed. If you’re a novice or are short on time, stick with buying established plants from a nursery.
How do I grow chrysanthemums?
Once you’ve squared off a sunny spot in your garden and have decided that you’d like to plant mums there, it’s time to get started. Sunlight is an important factor in successfully growing mums, but so is water. Chrysanthemums do not like sitting in water. Your garden plot needs to be well-draining soil or your plants will quickly develop root rot.
Mums do not need deep holes; dig only deep enough to cover the root ball of the plant. Depending on your soil, it could be beneficial to add compost to the holes as you’re planting for an extra boost. Mums love fertilizer! After you have them in the ground, water the plants in. During the growing season keep the soil damp, but not wet, like the rest of your garden. To make it easy, here are those steps for growing chrysanthemums once again:
- Find a growing spot with adequate sunlight.
- Make sure the soil is well-draining.
- Dig a hole deep enough to cover the root ball of the chrysanthemum you’re planting.
- Optional: Add compost to the holes.
- Place plants and cover the root ball with soil.
- Water the plants so that the soil is damp, not wet.
If you want to grow your mums in pots or containers, carry on! Put them in a sunny spot and water them daily during the growing season. Remember to water them at least once a day. Mums that are potted in containers dry out very fast. Once the plants dry out, the blooms will start to die off. Mums also like to be fertilized often. Follow the instructions on your favorite fertilizer.
Do I need to pinch the buds off my mums?
Experienced mum growers know that it’s beneficial to your plants for you to pinch back the earliest buds of the season. This will push the plant to produce bigger, fuller flowers later in the season.
Simply reach down in the plant and pinch off the new buds. Continue to do this until the end of the first week of July, then allow your plant to bloom without interference.
When should mums bloom?
If you’re pinching early buds back like you should, your plants should start blooming a few weeks into September. It’s important to remember that your plant’s blooming season is going to depend on your first killing frost.
If you live in an area that has a very early first frost, your blooming season will be short. However, if you live somewhere that the temperatures are more mild, you could have a plant that blooms all the way through Thanksgiving.
How do I overwinter mums?
If you live in a colder climate, it’s the best choice to leave the dead foliage on the plants and mulch heavily around each plant after the killing frost. Some growers who live in the extremely cold areas of the country dig up their mums every winter and keep them in a cool, damp place until the last frost of winter. Then, they re-plant them outside. Proper overwintering will ensure that your plants come back year after year.
Can I have chrysanthemums indoors?
The short answer to this question is no, mums cannot grow successfully indoors. If you want to grab a few simply for seasonal decor purposes, they would do fine for a month or so.
What varieties of mums are the most unique for my garden?
Heirloom mums are definitely having their moment. Growers love them because of their show-stopping blooms and florists love them for their long vase life. There are so many varieties of mums to choose from, but the five on this list are my absolute favorites. Some of them look like dahlias while others have humongous blooms that flare out like the legs of a spider. Note that all varieties of mums are toxic to dogs and cats, according to the ASPCA, so keep them away from pets.
“Fleur De Lis”: The “Fleur De Lis” mum is definitely a showstopper. This variety is sought out yearly by growers and is in high demand. It is an extra-large purple spider mum that reminds me of the very best fireworks that money can buy.
“Peter Magnus”: These blooms have a pinkish-purple tint to them and grow as adorable little poms. They are extremely similar to the shape of a smaller dahlia bloom.
“Senkyo Kenshin”: This spider mum is a gorgeous peach color and has unique looking petals. You’ll find that the blooms can grow larger than three or four inches in diameter. They make for a stellar focal flower in arrangements.