Stella d’oro daylily companion plant

Hemerocallis

Daylilies and I go way back. Hardy, drought-tolerant, profuse bloomers: what’s not to like? Add to that their eagerness to spread and multiply, and you’ve got yourself an easy addition to your home and garden.

Hemerocallis ‘Stella de Oro’

Because of its popularity, the daylily is available in a staggering array of colors and growing habits. They’re forgiving of most forms of maltreatment and thrive on minimal attention.

Establishing and growing daylilies is an excellent starting project for the beginner, and finding a unique or quirky hybrid species is a feather in the hat for more experienced gardeners.

Today we’ll learn about why daylilies are such excellent additions for your garden, and how to handle the handful of difficulties these flashy flowers can be prone to. We’ll take a look at a few cultivars I’ve had first-hand experience with as well.

Here’s what’s ahead:

An Introduction

You’re probably familiar with Hemerocallis in one form or another. This latin name means “beautiful day” in Greek, and that’s about as fitting as it gets for botanical names.

The brightly colored blooms are popular across most growing zones in the United States, and in many regions worldwide. Hemerocallis traces its origin to Asia and then to Europe, so this fantastic perennial is a world traveler.

Most cultivars will prosper in growing zones 3-9, although a few outliers will be happy in climates as cold as zone 2, and as warm as zone 10.

Daylilies with achillea and coreopsis.

Daylilies tend to grow in large clumps, and they get their common name because each individual blossom will last for only a single day.

Each clump of flowers can produce as many as two to four hundred blooms over the period of a month in the best conditions, so don’t let that “flower a day” limitation scare you off.

These prolific periods of flowering are supported by the stalks, otherwise known as “scapes.” Each scape can produce as many as a dozen buds, so you’ll have plenty of flowers to show off in your garden.

Pow, there you go! Next time you see a daylily at the garden center you can say, “Check out the buds on that scape,” and impress everybody around you.

Daylilies can grow in any light conditions, from full sun to full shade. But they’re at their best in full sun.

When grown in full shade, the quantity of flowers buds produced is minimal, and nothing to write home about. Hemerocallis is at its best when it has uninterrupted morning sun with a reprieve from the afternoon sunshine. We’ll go into a little more depth about this below.

Establishing in Your Garden

Because they’re so forgiving, it’s easy to imagine daylilies can be plopped into any old place and they’ll thank you for it. The truth isn’t far from that generality, but some forethought and planning will only benefit your gardening pursuits.

The timeliness of your Hemerocallis planting is potentially important.

In northern, cooler climates, you could get away with planting the hardy daylily in any season except the depths of winter (and even then, who knows?). But in warmer, southern climates you’ll want to get your daylily planted in the spring or the fall.

An orange “ditch lily.”

Your Hemerocallis can potentially reach heights between 1 and 6 feet, and will generally spread out to a width of 2 to 4 feet.

If you’re planting multiple specimens, you’ll space them 1 to 4 feet apart, depending on your patience reserves; patient gardeners will find theirs filling out in 2-3 years and eating up that space, but folks who want to make an impression NOW will space their daylily plantings closer to 1 foot apart.

Daylilies are at their best with about 8 hours of sunlight each day. They thrive in morning light where they receive shade from the hot late afternoon sun.

These plants don’t require much fertilizer, so an annual addition of compost will be all the added nutrients you need.

Adding Hemerocallis to Your Garden

You can plant your daylily a bit deeper than most perennials. The crowns can be buried to a depth of about 1 inch below the soil line.

Water your daylilies a few times a week for 2-4 weeks after planting, but after a month or so you’ll only need to water once a week, tops.

After the first year of growth you’ll find that your daylily has become drought tolerant and only needs to be watered during the worst dry periods.

When first adding Hemerocallis to your garden, you’re going to want to loosen that soil up a bit. Hardy as it is, the daylily benefits from a good bit of forethought and planning.

Most garden centers will sell these in a pot size of 1 to 2 gallons, so you’re ideally going to till the soil of the planting area to a depth of 18 inches.

Different cultivars will bloom at different periods of the summer, so staggering your planting with a variety of different types of Hemerocallis is the way to go if you want to have continued blooms throughout the growing season.

If you plant a single cultivar, you can expect a grand and lovely, but short, period of flowering.

Soil Conditions and a Drink of Water

The only area where your daylily is particular is related to the quality of its soil.

It wants to be placed into good-quality garden soil, that magical middle-ground of high fertility, good drainage, and generally moist conditions.

If your yard is like mine and does not foster daylily happiness naturally, you can amend your native soil with compost.

If your soil is dense and heavy, the compost will help to break it up. On the other hand, if your soil is sandy and fast-draining, the addition of compost will help to increase the moisture retention of your garden.

Maintaining Your Plantings

Once it’s established, you can pretty much lace your fingers behind your head and relax.

This perennial is capable and ready to take care of itself, but there are a few ways you can help it along:

Deadheading and Maximizing Your Flowers

Most daylilies will essentially deadhead themselves, so that’s one garden chore we can cross off the list.

Once a scape is out of bloom and has no future buds to produce, it’s wise to remove it from the plant.

Similarly, when the daylily produces its seedheads, it’s best to prune these from the flower to aid future flower production.

The Great Divide

You’ll divide your daylilies every 2 to 4 years, depending on how fast they’re spreading and growing out.

You’ll notice when the clump is too big for its own comfort because the flower production suffers and the plant, as a whole, looks unhappy.

Divide in late summer for the best results. You can chop in half, in quarters, or in tenths, depending on how large that Hemerocallis clump is. Spread those babies out to your neighbors for maximum impact (more on that later).

Cutting Back Dead Foliage

Ideally, you’re going to leave the foliage in place throughout the winter and into the spring. Once the weather warms up and the soil thaws, you’re going to want to flush cut any dead foliage from the daylily.

Leaving that foliage standing throughout the winter acts as an additional layer of mulch for your daylily, so think twice before flush cutting your entire garden in the fall.

Pests and Other Problems

I love how daylilies are a “set it and forget it” type of perennial. They require minimum fuss and are susceptible to only a few troubles. Brush up on your pesticide basics with our guide to safe chemical application in the garden.

The Bugs

Aphids, slugs, spider mites, gall midges, and thrips are the most common potential sources of most of your insect problems. Slugs are notoriously troublesome, but Gardener’s Path has put together an all-you-need-to-know guide on handling these slimy troublemakers.

The gall midge is a European pest that was discovered in British Columbia in the early 2000s. In the years since, it has spread throughout the Pacific Northwest. The gall midge overwinters inside of Hemerocallis buds, and destroys them from the inside out.

Contact insecticides are ineffective, and the best way to remove the threat from your garden is to plant cultivars resistant to the gall midge. If you spot malformed buds on your Hemerocallis and live in the Pacific Northwest, Canada, or affected parts of Europe, you should remove the infected area of the plant and destroy it.

Infected buds will be inflated and distorted, and will not open properly. Daylilies that flower early are most likely to be affected by the gall midge.

Thrips are a common garden problem, and don’t require any treatment if your plants are healthy. If an infestation is too big to ignore, spray with horticultural oil to eliminate the thrip problem.

Spider mites cause trouble mostly during periods of hot, dry weather. Keep your daylilies well watered, and give them a little shower once a week or so during hot weather to help minimize spider mites.

Aphids are a familiar sight for the gardener. A homemade insecticidal soap treatment is usually enough to take care of these pesky bugs.

Streak and Rust

Streak and rust are more serious issues affecting the health of Hemerocallis. Both are fungal issues with many similarities.

They both appear as yellow-orange streaks and flecks on the foliage of your plants. Symptoms appear during warm weather, and may initially be confused with chlorosis.

The easiest way to determine what you’re looking at is to touch the affected areas with your finger, a glove, or a tissue. If a powdery, orange streak wipes off, then you’re dealing with rust.

Bonide 811 Copper 4E Fungicide, 16 Oz.

Another indicator to determine the difference between rust and streak is the gross-looking pustule that develops only with rust.

Streak is a less serious affliction. The fungus can overwinter in the foliage, so removing your dead foliage and starting fresh each spring is the best way to prevent exposure.

If your plants are affected by streak during the growing season, you should instead cut back the affected areas immediately and destroy the leaves.

Rust is a more serious condition. It spreads very quickly between plants. Although many gardeners will recommend destroying any Hemerocallis infected with rust, there may be other options.

Flush cutting all foliage could help to limit the spread of rust. Use a quality copper fungicide like the one pictured above, available on Amazon, to prevent further rust (and streak) infections.

Always destroy any plant material that’s infected with a fungus or disease. Don’t compost it!

Dang Deer!

If you live in deer country, there’s a good chance that Bambi is gonna be munching on your daylilies. Those flowers and foliage are like caviar to our ungulate friends.

Alternate your use of products like Scram, Milorganite, and Liquid Fence to deter deer from your garden.

Suggested Cultivars (and Where to Buy)

Daylilies have some interesting naming conventions, tied with the iris in my opinion.

The ‘Primal Scream’ Hemerocallis is a solid go-to choice for bountiful orange blooms. The flowers are large and the plant grows to a modest height of about three feet.

Hemerocallis ‘Primal Scream,’ available from Nature Hills Nursery

It can grow in zones 3-9, so almost every gardener in the US can expect beautiful blooms in their garden from ‘Primal Scream.’

I like to pair orange flowers with something silvery like dusty miller, or maybe metallic-colored purple foliage like persian shield.

I’ve always been a sucker for white and yellow flowers, and ‘White Gloves‘ provides a little bit of both. I’d call the flowers “creamy,” based on the ones I’ve seen in person.

Hemerocallis ‘White Gloves,’ available from Nature Hills

It’s a gorgeous flower with a good size (each bloom is about five inches wide), and it blooms early enough in the season to provide a nice transition from springtime pastels to the more bold and vibrant summer colors.

‘White Gloves’ will grow in zones 3-9, and it also reaches a modest height of just over two feet.

Possessing a dark purple flower that draws you in, the ‘Nosferatu’ Hemerocallis possesses a color and a name perfect for gardeners with a bit of an edge. The robust plant will eagerly grow in almost any condition, and provide you with swaths of purple flowers throughout the mid-season.

Hemerocallis ‘Nosferatu,’ available from Nature Hills Nursery

The hue of this cultivar is spectacular, and relatively uncommon in the garden. It’s a must-see plant!

No discussion of growing daylilies is complete without mentioning the ‘Stella d’Oro.’ One of the staples of any perennial garden, ‘Stella d’Oro’ will grow just about anywhere, and happily flowers throughout the entire summer.

It is resistant to many diseases, and comes in at a modest one foot in height.

Hemerocallis ‘Stella d’Oro’

You can find these flowers in just about every garden center you come across, or they are available via Nature Hills Nursery.

You’re probably familiar with the wild-growing orange daylily seen on the sides of roads and on the borders of pasture land. This is H. fulva, a tenacious plant given the unfortunate nicknames “ditch lily” and “gutter lily.”

This member of the daylily family grows eagerly, and quickly spreads beyond its original planting area.

These aren’t bad traits to have, if you have a large area you need filled up. However, if you’re working with a small and contained garden area, you’ll want to select a more modest cultivar.

The Perfect Neighborly Perennial

I enjoy the color and durability that Hemerocallis provides, but my favorite aspect of this perennial is how voraciously it grows into dividable clumps.

As we’ve mentioned, daylilies won’t flower if they’re left undivided for too long, and that’s why it is the perfect plant for your garden.

Dividing is necessary for the health of the plant, but it’s also an excellent way to get to know your neighbors and share bits of your garden with each other.

Most gardeners jump at the chance to score a few free plants, and when you’ve got clumps of daylilies to offer, you’ll find people jumping to grab a few of their own.

I always imagined gardens in my neighborhood as the patches of a quilt. As individuals, we can’t cover our entire neighborhood in a green blanket. But we can all contribute our own squares.

When those squares are combined, we’re living in a greener place, and those individual efforts we take to beautify the landscape and protect our local ecosystems can make a bigger difference when we work together. That’s what makes daylilies the perfect neighborly perennial.

You can put together a great perennial border by combining them with other perennials like black-eyed susans, coreopsis, and echinacea.

Do you have a recommended variety, or a question or bit of advice on handling this perennial? We’d love to see it in the comment section below. Drop us a line!

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Product photos via Bonide, Nature Hills Nursery. Uncredited photos: .

About Matt Suwak

Matt Suwak was reared by the bear and the bobcat and the coyote of rural Pennsylvania. This upbringing keeps him permanently affixed to the outdoors where most of his personal time is invested in gardening, bird watching, and hiking. He presently resides in Philadelphia and works under the sun as a landscaper and gardener, and by moonlight as a writer. An incessant questioning of “Why?” affords him countless opportunities to ponder the (in)significance of the great and the small. He considers folksy adages priceless treasures and is fueled almost entirely by beer and hot sauce.

Growing Daylilies

Daylily (Hemerocallis): Indestructible Beauty

Latin Name Pronunciation: hem-er-oh-kal’iss

We’d describe the Daylily as “the backbone of the perennial garden” except that would do a disservice to this most durable plant — backbones, as every gardener knows, are fragile things, whereas Daylilies are close to indestructible. Thriving in a wide range of soils and in sun or partial shade, these long-lived perennials are sufficiently vigorous to function as a weed-suppressing ground cover. Pests and diseases rarely pose a serious threat if Daylilies are grown in suitable conditions and given minimal care.

By entering your email you will receive a link via email to download our free eBook “How to Design Your Garden.” You will also be subscribed to receive email from White Flower Farm.

A Daylily for Every Taste
Whether your taste in flowers tends toward the chaste or the shamelessly flamboyant, there is a Daylily for you. There were, in fact, at last counting some 60,000 distinct Daylily varieties; from this horde, we’ve selected a diverse but manageable assortment of the very best. If you want trumpets of snowy white with a cool, green throat, you can opt for ‘Lady Elizabeth’. If you need a full-blooded, almost black, purple-red, we suggest ‘Jungle Beauty’. You’ll find every color here other than blue, and if you can’t make decisions, you may purchase one of our collections or mixes, which offer a smorgasbord of different hues and flower types.

By entering your email you will receive a link via email to download our free eBook “How to Design Your Garden.” You will also be subscribed to receive email from White Flower Farm.

Weeks and Weeks of Flowers
As the name “Daylily” suggests, individual Daylily blossoms last only a day, but a given plant produces new flowering stems over some weeks, and if early bloomers are matched with midseason and late Daylilies, as in our “Unique 50 ” mix, the result is a summer of unceasing bloom.

What We Ship
We ship large, field-grown plants that usually bloom the first year. They will outperform lesser grades offered elsewhere. Except as noted, all are “dormant” varieties, meaning their leaves are deciduous.

Daylily Growing Tips

Daylily – How to Care for Your Plant

Light/Watering: Daylilies will grow in full sun in the North and will tolerate the same in the South with sufficient moisture. Plants grow well in partial shade, which is preferred for varieties with pastel flowers. Daylilies are drought-tolerant once established, but perform best with consistent moisture.

Fertilizer/Soil and pH
These perennials prefer a well-drained loam with a pH approaching neutral. Soils rich in organic matter encourage profuse blooming, although many of the older hybrids will grow well even in a sandy situation. Fertilize lightly once the plants are established, but avoid using mixes high in nitrogen. A summer mulch is appreciated, since it will help soils retain moisture and buffer soil temperatures.

Pests/Diseases
Daylilies rank high on the list of plants resistant to insects and diseases. Thrips occasionally feed on buds or flowers, distorting the blooms and causing cork-like lesions on the flower spikes, which may then break at the affected area. Use insecticidal soap to discourage these tiny pests, and remove and destroy any infested buds or flowers. Spider mites can infest the foliage during hot, dry weather; wash them off with a forceful water spray regularly, or use an appropriate insecticide. Yellowing leaves and brown leaf tips result from normal senescence after flowering; regular grooming will keep plants looking fresh. If foliage becomes unsightly, cut it back to the ground, water well, and in time new foliage will appear.

Companions
Platycodon, Rudbeckia, Liatris, Shasta Daisy, and Echinacea are all fine companions for sunny situations; Ferns, Hosta, and Solomon’s Seal are lovely with Daylilies growing in shadier spots. If you underplant Daylilies with Daffodils, the foliage of the former will hide the foliage of the latter as it dies back, and you’ll get two gorgeous seasons of bloom from one area with very little maintenance.

Reflowering
Many reblooming varieties are now available; these require regular removal of old flowers to perform at their best. On all types of Daylilies, spent flowers should be snapped off daily and the entire flower scape should be cut off after all buds have passed.

Dividing/Transplanting
Daylilies should be divided every 3 to 5 years, and repeat-bloomers every two years since new growth supports the rebloom. Two spading forks held back-to-back and prised apart makes this chore easy. Transplant anytime the soil is workable, watering well after planting in the new location.

End of Season Care:
Simply remove old foliage by cutting back to the ground or pulling off. Daylilies are very cold hardy, with the exception of some evergreen varieties, so a winter mulch is little more than a nicety.

Plants may be mulched, but take care to keep mulch material away from the crowns and stems of the plants. Check to make sure that the vines of Group I and II plants are tied securely to supports to withstand winter winds.

Calendar of Care for Daylilies

Early Spring: Apply a light application of balanced or slow-release fertilizer low in nitrogen or side-dress with compost and organic amendments when new growth appears. Divide or transplant as necessary, watering well afterward.

Mid-Spring: Water well if it is unseasonably dry, as plants prefer evenly moist soil.

Late Spring: Remove spent flowers daily. Watch for flower thrips and treat accordingly.

Summer: Continue to deadhead as needed, and cut away flower scapes after all buds have opened. Groom plants by removing yellow or dead leaves. Supplement natural rainfall to provide an inch of water a week, and apply 2–3 inches of mulch around plants, keeping it an inch or so away from the crowns. Monitor plants for spider mites and spray if needed.

Fall: Remove old foliage by cutting back to the ground.

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FAQ Perennials

Which perennials bloom all summer? Few bloom all summer, but many have long bloom seasons such as viola, coreopsis, Blue Buttery scabiosa, Stella de Oro daylily, and Aster x frikartii. All will bloom for about 12 weeks with regular deadheading. Mixing perennials with different bloom times will give your bed color all year long.

Can perennials be combined with annuals? Yes, annuals can be very useful in perennial beds while you are waiting for perennials to fill in. They are also useful in adding season long color in areas where perennials may have a shorter bloom period.

Which perennials thrive in shade? Hostas, Columbines, Astilbe, Helleborus, Bergenia, Bleeding heart, Primrose, Pulmonaria, Vinca, Anemones, plus many more.

What can I plant safely in my mountain garden? Plants classified Zone 2 or Zone 3 can be safely planted at high altitudes. In warmer or protected areas of your garden, Zone 4 plants are a possibility. Spring planting is preferable to fall for proper establishment of root systems. Plants to try: Columbines, Campanulas, Centaurea, Daylilies, Delphinium, Hostas, Peonies and Rudbeckia.

When do I know when it is time to divide my perennials? Some need division every three years, some every four or five years. Some need never be divided. When you see crowded growth and blooms seems to diminish it’s usually time to divide.

What is the best time of the year to divide and/or transplant my perennials? Early blooming perennials are best divided in late summer or fall; late or fall blooming perennials divide best in the spring.

Should I cut my perennials back in the fall or spring? Generally it is a good idea to cut back dead foliage in the fall to prevent pest and disease organisms from wintering over in dead and decaying foliage. Some plants will retain upright form and provide winter interest to the garden.

Can I mulch my flower garden with leaves in the fall? Yes, you may want to shred the leaves with a mower for a neater look and better blending with soil. Avoid layering leaves so deeply that water can not penetrate the soil.

Why don’t my perennials look as full and nice as those in catalog photographs? Is there something wrong? Newly planted perennials take about three years to mature to their full height and spread. Be patient.

How do I plant peonies? Peonies should be planted in a good soil rich in organic material. Prepare a wide planting area rather than a deep one. The eyes of the peony should sit about 1″-1 1/2″ below the soil level. Don’t expect much bloom for one or two years. Peonies rarely need dividing and are very long lived. Pick your site carefully and prepare soil well.

When is the best time to plant perennials? Generally, container grown perennials can safely be planted in the metro area following May 1st and continuing through the fall depending on the variability of the weather conditions from year to year. Some hardy varieties may be planted in late March and April, again depending on the weather pattern.

Will late snow hurt my perennials that have started to emerge? Generally speaking, plants come out of dormancy as weather permits them. Occasionally, they may find themselves buried in the late snow. Broken stems and frozen blooms may result. Prune back broken or frozen areas and they will recover.

What should I do when my perennials stop blooming? Generally, you should prune back the stems which will give the plant a cleaner neater appearance. It may also encourage it to rebloom. Continue maintaining the foliage to promote the health of the plant and wait for the following years show. Consider attractive foliage as much as you do beautiful bloom.

Are perennials easier to grow than annuals? They present different challenges to gardeners. Many will live many years with little or no maintenance, other will require a watchful eye for division, or better location. Because they remain in the garden for more than one season, they are often more rewarding to the gardener for his or her efforts towards them.

What should I do following a devastating hailstorm? Carefully clean debris out of the garden and cut back damaged plants. Hail will often severely compact the soil, so it needs to be cultivated carefully and some organic material lightly amended into it. Avoid any application of fertilizer until plants are once again showing signs of renewed growth. Be patient: the garden will renew itself.

What causes powdery mildew? Powdery mildew is a fungus common in late summer with our cool nights and warm days. It may also attack when foliage is excessively wet or plants are over crowded preventing air circulation. Avoid overhead sprinkling and space your plants properly. Fungicide applications are only effective as a preventive measure. They are of limited value once an outbreak has occurred.

How should I mulch my perennials? Shredded cedar mulch or mini nuggets are great mulches. Spread about 3″ deep. Avoid mulching too close to crowns of plants to avoid crown rot. Peat moss and compost are best as amendments. Used as a mulch, they may form a crust which prevents water from penetrating the soil.

How should I fertilize my perennials? Early in the season, following a light cultivation, a general application of a well balanced fertilizer like ProRich Rose & Perennial Food is usually adequate. An additional application in the middle of the growing season will help long and late blooming perennials look their best.

When is the best time to divide iris? Usually in late July or early August.

How do I prune my clematis vine? There are three different types of clematis that need to be pruned differently. See this table for a list of varieties and how they should be pruned.

Pruning Clematis Vines

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