Fertilizing Big Blue Lilyturf: What, When and How Much

"Do I have to fertilize my Big Blue?" Customers ask us this more than anything else about this plant, and our answer is no, not in the first year and only lightly after that. Big Blue Lilyturf grows happily in lean soil, so feeding is a small boost and not a lifeline. It does well across USDA zones 5a through 10b, and the same simple plan works in all of them.

Get the feeding wrong and you get floppy, leggy leaves, a loose clump and, in soggy beds, crown rot. Get it right and a thin clump fills in and keeps its dark green color.

This article talks about fertilizing Big Blue Lilyturf and answers the questions customers ask us most. Read on to learn why new plants should be left alone, which product to pick, the right spring window, how much to put down, and the mistakes to skip.

Does Big Blue Lilyturf Actually Need Fertilizer?

The short answer: no, it doesn't. Liriope muscari 'Big Blue' tolerates lean soil well and will survive in poor, neglected beds without supplemental feeding. However, a light application of fertilizer in spring supports denser, more vigorous foliage and can encourage fuller blooms.

Think of fertilizing as optional insurance, not a requirement. If your garden already has decent soil or you've added compost at planting, your Big Blue Lilyturf will likely perform fine on its own. If you notice weak growth, sparse foliage, or pale leaves, a single spring feeding may help.

Don't assume a new plant needs feeding. Nursery-grown Big Blue Lilyturf often arrives well-nourished. Wait until the second spring after planting before adding supplemental fertilizer, or only if growth looks weak.

You will read advice to mix fertilizer into the planting hole. We don't follow it. A new clump has fresh nursery soil around its roots, and extra fertilizer there only risks burning them. Work in a little compost if you want to give it a start, as we cover in our planting guide.

What Type of Fertilizer Works Best

We recommend either a general-purpose or a slow-release fertilizer. Each has a place depending on your situation, and in our rows we lean toward slow-release because it is hard to overdo.

General-purpose fertilizer is the standard choice. Look for a balanced NPK ratio like 10-10-10 or similar. These work quickly, delivering nutrients within weeks of application. They're inexpensive and widely available as granules or liquid concentrate.

Slow-release fertilizer is ideal if you prefer set-it-and-forget-it care. These formulations release nutrients gradually over several months, reducing the risk of over-fertilizing. They're convenient if you manage multiple plantings, but they cost more upfront.

Avoid high-nitrogen fertilizers designed for lawns. Excess nitrogen pushes leafy growth at the expense of flowers and can make the clump loose and ungainly. Stick to balanced or slightly higher potassium formulations to encourage bloom development.

When to Fertilize Big Blue Lilyturf

Spring is the only time to fertilize. Apply fertilizer as new growth emerges, roughly when you see fresh leaves unfurling from the clump. Timing varies by region:

• In zones 7-10, where foliage stays green year-round, fertilize as soon as growth flushes in early to mid-spring.
• In zones 5-6, where foliage may brown or die back in winter, fertilize once new shoots emerge and the danger of hard frost has passed.

Late spring applications (May or June in cooler zones) also work if you miss the earliest window. The key is applying fertilizer while the plant is actively growing, not in summer, fall, or winter.

If you cut back last year's tired foliage, do it before spring growth begins, then feed once new shoots show. Our cutting back guide has the details.

Why spring only? Fertilizing later in the season encourages tender new growth that late frost or winter cold can damage. Spring applications give the plant time to harden off before cooler weather arrives.

You may also hear that lilyturf should be fed in fall to build roots. We don't do it. Big Blue is evergreen in mild zones, so that soft fall growth sits exposed all winter.

How to Fertilize: Step by Step

Materials needed:

• General-purpose or slow-release fertilizer (granular or liquid concentrate)
• Measuring spoon or cup if using granules
• Watering can or garden hose
• Optional: garden gloves

Steps:

1. Assess your plant. Look at the Big Blue Lilyturf clump. If it looks healthy with dense green foliage and is spreading at a normal pace, fertilizing is optional. If it seems thin, pale, or slow-growing, proceed.
2. Choose your product. Purchase a general-purpose or slow-release fertilizer from a garden center or online. Buy a size appropriate for your garden's scale. One bag will typically treat multiple plantings.
3. Clear the base. Gently remove any dead leaves, mulch, or debris from around the clump's base with your hands or a small rake. You need access to the soil at the crown.
4. Apply according to label directions. This is critical: follow the manufacturer's instructions for rate and application method. Most general-purpose granular fertilizers recommend a handful (roughly 1 to 2 ounces) per plant, scattered around the base. Slow-release products often cover more area per application.
5. Water thoroughly. After applying granular fertilizer, water the area well. This helps dissolve the nutrients and move them into the root zone. If using liquid concentrate, mix and apply per label instructions, usually diluted in water.
6. Replace mulch (optional). Once watered, you can restore mulch around the base if you use it. Keep mulch a few inches away from the crown to prevent rot.
7. Do not repeat. One light application per growing season is sufficient. If you apply slow-release fertilizer, skip any additional feeding for that season.

Tips to Avoid Common Mistakes

Don't over-fertilize. This is the biggest pitfall. Heavy or frequent feeding produces leggy, weak growth and can promote crown rot in poorly drained soil. The "light application" in the plant facts means exactly that: restrain yourself.

Don't ignore the soil. If your soil is compacted clay or heavily depleted, consider a soil test before fertilizing. Adding compost or improving drainage may do more good than fertilizer alone. Big Blue Lilyturf adapts to average, well-drained soil, so if yours is soggy, fix drainage first. Our soil guide shows how.

Don't bypass the label. Different fertilizer products vary widely in concentration and application rate. Applying twice the recommended amount won't speed results and may cause harm.

What to Expect and What to Pair It With

You may notice fuller foliage density within a few weeks of a spring application. Leaf color may deepen slightly. Bloom production in summer may be more abundant, though Big Blue Lilyturf flowers reliably regardless of fertilizer.

Don't expect dramatic overnight changes. A light fertilizer application supports the plant's natural vigor and doesn't transform it. The real benefit is consistency over years, because a well-nourished clump spreads steadily and maintains its appearance better than a truly starved one. Its violet-purple spikes arrive in autumn, so judge the feeding by the foliage first.

Water new plants well through the first growing season, and see our watering guide for how. Once established, Big Blue needs only low to moderate water. Fertilizer won't make up for deep shade either, since flowers are produced most freely in a sunny location.

For more complete care guidance, see our Big Blue Lilyturf care guide, which covers soil preparation, watering, pruning, and winter management.

Quick Reference: Fertilizing Schedule

Here is the whole schedule at a glance.

Task	Timing	Notes
Choose fertilizer product	Before planting or spring	General-purpose or slow-release, balanced NPK ratio
Apply light application	Early to mid-spring as new growth emerges	Follow product label rate, typically 1-2 ounces per plant
Water after application	Immediately following fertilizer	Dissolves granules and moves nutrients to roots
Second application	Never	One light spring feeding per season is enough
Skip fertilizing if	Anytime	Plant is healthy, vigorous, and spreading normally
Consider fertilizing if	Spring of second year	New planting shows weak or pale growth

Feed Big Blue Once, Then Leave It Alone

Big Blue Lilyturf asks very little. Skip feeding in year one, give a clump that looks thin one light spring feeding of a balanced or slow-release product, water it in, and stop there.

Our growers watch each clump through the year, checking for pale new leaves in spring, floppy growth after a wet summer and soggy crowns over winter. We are a small business with our own farms, and we grow and sell top-quality plants, so we'd rather tell you to hold back than sell you more fertilizer.