The Complete Guide to Fertilizing Daylilies for Maximum Blooms

Hi there! As an expert gardener and landscaper, I‘m excited to share this comprehensive guide on fertilizing daylilies. Properly nourishing these colorful perennials will give you a spectacular floral display in your garden for months on end. In this guide, I‘ll cover everything you need to know about fertilizer for daylilies, from product selection to optimal application methods and timing. Let‘s get started!

Getting to Know the Daylily

Before we dive into fertilization, let‘s review some key facts about daylilies that impact their nutrient needs:

• Daylilies are perennial plants that live for many years.
• They produce colorful flowers on tall flower scapes from early to late summer.
• Each flower only lasts a day, but each scape produces many buds that open in succession.
• Daylilies thrive in full sun to partial shade and grow well in most soils.
• They have rugged root systems that spread horizontally to form clumps.

Knowing these basics about daylilies will inform our fertilization strategy for healthy growth and maximum blooms.

Daylily Fertilizer Needs

Daylilies thrive when provided with a balanced fertilizer containing nitrogen, phosphorus and potassium (NPK). Here‘s a closer look at what each nutrient does:

Nitrogen (N)

• Promotes lush green foliage growth
• Aids in photosynthesis
• Encourages stem and shoot development
• Daylilies need fertilizer with 10-15% nitrogen

Phosphorus (P)

• Essential for strong root growth
• Helps develop flower buds
• Use fertilizer with 10-15% phosphorus content

Potassium (K)

• Supports overall plant health and resilience
• Helps daylilies tolerate drought, pests, and diseases
• Potassium should be around 10% of the NPK ratio

According to the American Daylily Society, a balanced fertilizer formula with equal parts NPK such as 10-10-10 or 15-15-15 is ideal for daylilies. Slow release or organic fertilizers are preferable as they provide a steady, gentle release of nutrients over a longer period of time.

When Should You Fertilize Daylilies?

Proper timing of fertilizer applications encourages prolific blooms:

Early Spring

Apply fertilizer 2-4 weeks before bloom season begins. This fuels plant growth and builds up flower buds underground before they emerge.

After First Bloom

Fertilize again 6 weeks after the initial bloom period ends. This nourishes the plant for reblooming.

Midsummer

A third fertilization 6-8 weeks after the second bloom cycle finishes will support continued reblooming if desired.

Fall

One final light application in early fall prepares the plant for winter dormancy. Avoid fertilizing after mid-fall.

How Frequently Should You Fertilize?

In optimal conditions, fertilizing daylilies 2-3 times per year is usually sufficient:

• Once in early spring to fuel initial growth
• Again after first bloom cycle ends to encourage reblooming
• Optional midsummer application for sustained blooms

If your soil is very poor or sandy, you may need to fertilize up to once a month during the active growing season. Keep an eye on your plants and fertilize again if you notice yellowish foliage or stunted growth.

Daylily Fertilizer Application Methods

You have two main options for applying fertilizer to your daylilies:

Spread Granular Fertilizer Over the Soil

With this method, you‘ll scatter soluble granules over the soil around the plants. Be sure to distribute the fertilizer evenly within the entire drip zone. After applying, water thoroughly to dissolve the fertilizer and bring the nutrients down into the root zone.

Apply Liquid Fertilizer Around the Base

For liquid fertilizer, first dilute it per the product‘s instructions. Then pour the ready-to-use solution around the base of each plant. Avoid pouring directly on the foliage as it can burn the leaves.

Liquid fertilizers offer immediate nutrient absorption through the roots. Reapply every 2-3 weeks according to the label directions.

No matter which type of fertilizer you use, always water it in well after application to activate it. Follow manufacturer recommended rates carefully to avoid accidental overfertilization.

Excellent Organic Fertilizer Options for Daylilies

Organic fertilizers break down slowly in the soil, providing a gentle release of nutrients over a longer timeframe. Here are some great organic options:

Compost and Compost Tea

Compost provides daylilies with the full spectrum of macronutrients like NPK along with micronutrients. It also adds beneficial organic matter to improve soil texture.

Compost tea is made by steeping high-quality compost in water. It offers a concentrated dose of nutrients and beneficial microbes from the compost.

Manure

Cow, horse, sheep, chicken or rabbit manures are all excellent sources of nitrogen and phosphorus for daylilies. Always use well-aged or composted manure rather than fresh, which can burn plants.

Fish Emulsion

Fish emulsion fertilizer is made from fish byproducts and provides fast-acting nitrogen and micronutrients. It has a strong odor during application but works very quickly.

Seaweed Extract

Derived from seaweed, this fertilizer contains potassium, micronutrients, and compounds that help plants withstand drought and resist diseases. It‘s available as an easy-to-use liquid fertilizer.

Bone and Blood Meal

Both bone meal and blood meal provide phosphorus and nitrogen. They are best mixed into the soil prior to planting but can also be used as a side dressing.

Chemical/Synthetic Fertilizer Options

Chemical fertilizers offer precise NPK ratios and rapid nutrient uptake. Here are some good synthetic formulas:

• 10-10-10 or 12-12-12: Balanced NPK ratios perfect for daylilies. Apply at 2-4 lbs per 100 sq ft in early spring.

• Superphosphate (0-20-0): The high phosphorus content encourages flowering. Use in fall at a low application rate.

• Potassium sulfate (0-0-50): Provides potassium for cold hardiness. Use midsummer if soils are potassium deficient.

Always carefully follow label instructions when using chemical fertilizers to avoid over-application.

Supplemental Soil Amendments

In addition to traditional fertilizers, certain amendments can provide other nutrients to optimize daylily growth:

Epsom Salts

Epsom salts contain magnesium and sulfur, both of which support enzyme processes needed for blooming. Apply 1 Tbsp per foot of plant height around plants in early spring. You can also dissolve 1-2 Tbsp per gallon of water and spray leaves monthly as a foliar feed.

Bone Meal

The high phosphorus content of bone meal specifically stimulates flowering. In spring, mix 1 cup per 100 sq ft of area into soil or sprinkle around each plant.

Lime

If a soil test reveals your soil is too acidic (pH below 6), incorporate dolomitic garden lime in the fall and early spring to raise pH closer to the daylily‘s preferred neutral range.

Reading the Signs – When Do Daylilies Need Fertilizer?

Here are some telltale signs that your daylilies are running low on nutrients and need fertilization:

• Thin, weak stems and foliage
• Sparse or missing flower scapes
• Smaller blooms
• Light green or yellowing leaves
• Lackluster reblooming
• Short bloom period
• Stunted growth

Promptly addressing any nutrient deficiencies you observe will get your plants back to vigorous growth and gorgeous blooms.

Avoiding Common Fertilizing Pitfalls

While fertilizer is important for daylilies, it‘s possible to overdo it. Here are some common mistakes to avoid:

• Overfertilizing: Too much fertilizer can burn the tender roots and foliage. Always stay within recommended rates.

• Applying too late in fall: Fertilizing past mid-fall prevents dormancy, leaving plants vulnerable to winter cold damage.

• Sprinkling granules onto leaves: Direct contact burns foliage. Always water granular fertilizers into the soil.

• Failing to water in: Without watering, fertilizer salts build up and reach toxic concentrations.

If you see signs of fertilizer burn like browned leaf tips, flush soil out by heavily watering. Then resume fertilizing at a reduced rate.

Troubleshooting Lack of Blooms Despite Fertilizing

If your daylilies aren‘t blooming well despite regular fertilizer applications, the culprit is likely environmental:

• **Insufficient sunlight** – daylilies require at least 6 hours of direct sun daily to bloom prolifically.
• **Too much shade** – excessive shade slows flower bud development.
• **Overcrowding** – thin congested daylily beds so plants have sufficient room to grow.
• **Underwatering** – inadequate water inhibits nutrient absorption and flowering.
• **Late frost** – cold damage can destroy emerging flower buds.
• **Poor drainage** – compacted, dense soil reduces flowering.
• **Pests** – thrips, aphids, and other pests attack buds and hamper blooming.

Before adjusting your fertilizer regimen, ensure daylilies aren‘t being affected by one of these environmental factors first.

Putting it All Together: Daylily Fertilizing Best Practices

Follow this season-by-season fertilizing schedule for flourishing, flower-filled daylilies:

Spring

• Test soil pH and amend with lime if needed
• Apply balanced granular fertilizer 2-4 weeks before bloom time
• Mix 1-2 cups bone meal into soil per plant
• Top dress with compost or aged manure
• Apply Epsom salts as soil drench or foliar spray

Summer

• Fertilize with liquid fertilizer every 3-4 weeks
• Continue Epsom salt foliar sprays
• Reapply bone meal after each bloom cycle
• Water deeply 2-3 times per week

Fall

• One final light fertilization in early fall
• Discontinue fertilizer after mid fall for dormancy
• Mulch plants to protect from frost heave

Properly nourishing your daylilies at the key stages of growth encourages vigorous plants and months of colorful blooms. Try different organic and chemical fertilizer blends to see what your daylilies respond to best. With the right nutrition incorporated at the critical times, you‘ll be rewarded with thriving, floriferous plants summer after summer.

I hope you found this guide helpful and you feel ready to fertilize your daylilies for maximum blooms this season! Let me know if you have any other questions.