How to Grow Trillium

How To Grow TrilliumHow To Grow Trillium

One of the stars of the spring woodlands across the United States is trillium. They are called the trinity flower because the plant has three sepals, three leaves and three petals on the flowers.

The flowers come in white, red, yellow and painted, depending upon the species. Trilliums are reliable perennials that slowly spread over time.

When & Where to Plant Trillium

Light: Trillium grow best in a partly-shaded, deciduous woodland habitat and along wet areas in the forest. The further South they grow, the more shade they will require.

Soil: Trillium grow well in fertile, moist, but well-drained soil that's high in organic matter. Trillium can be grown in clay soils, if amended with peat moss and compost.

Spacing: Space the small rhizomes (roots) about 6- to 12-inches apart and about 2- to 4-inches deep. Trilliums naturally multiply into clumps with multiple flowers, but this may take 2 to 4 years after planting.

Timing (planting): Plant trillium rhizomes (roots) in early spring or late summer.

Red TrilliumRed Trillium

How to Grow Trillium Throughout the Season

Growth Habit: Trilliums grow 12 to 18 inches tall with three leaves and three petals on the flowers. The flowers range in color from white to deep red, depending on the species. They emerge in early spring, and flower for a few weeks depending on the weather. Hot, dry weather will make them go by faster than cool, moist weather. After flowering they set seed and eventually the foliage yellows, allowing the plant to go dormant by midsummer.

Staking: No staking is needed for trillium.

Watering: If you're growing trillium in a forest soil rich in organic matter or amended with leaf mulch, peat moss and compost, little additional watering will be necessary for your trilliums. Once established they're tough plants. Watering right after planting, especially during dry periods, is a good way to help the rhizome get established.

trillium bare roottrillium bare root
Trillium is shipped and planted as a bare-root.
Painted TrilliumPainted Trillium
<a href="/perennials/woodland-wildflowers/trillium-painted">Painted Trillium</a>, Trillium undulatum, bloom during the Spring, and are a true delight in any woodland forest.

Fertilizing: Amend the soil at planting time with peat moss, leaf mulch (chopped, decaying leaves) or compost. Based on a soil test, adjust the pH to be slightly acidic. Usually the decaying leaves from deciduous trees provide the perfect growing medium for trillium. To enhance the growth in areas where leaves blow away or in a shade garden, each fall add a 1- to 2-inch thick layer of compost or leaf mulch to the planting area.

Trimming & Pruning: Trillium naturally wants to spread by clumping and setting seed. After flowering, let the seeds form. There's no need to cut back the plant in the forest. It will naturally yellow and disappear by midsummer. In the shade garden, if you want a tidier look, wait until the leaves start dying back before cutting the foliage to the ground.

Mulching: Mulch in fall with a 1- to 2-inch thick layer of leaf mulch. Trillium doesn't compete well with other plants, so use the mulch as a means of giving your trillium some room to grow and spread.

  1. White Trillium, Trillium grandiflorum, Wake-Robin

    White Trillium opens exquisite white blooms up to 4 inches across in mid-spring. Flowers fade to a pretty pale pink. This woodland wildflower requires patience but is well worth th...

    Learn More
    White Trillium White Wake Robin, Wood Lily Trillium grandiflorum
    As low as $17.98 Sale $8.99
    Per Bag of 3
    White Trillium opens exquisite white blooms up to 4 inches across in mid-spring. Flowers fade to a pretty pale pink. This woodland wildflower requires patience but is well worth the wait. Seeds produced by the plants and underground roots and will spread slowly into drifts of trillium that look like a white blanket covering the ground. (Trillium grandiflorum)
    Learn More
  2. Red Trillium, Trillium erectum, Wake-Robin

    Native Red Trillium is a beloved woodland wildflower with stunning, three-petaled burgundy flowers that float above a whorl of bright green leaves. Also known as Purple Trillium and ...

    Learn More
    Red Trillium Wake Robin, Stinking Benjamin, Purple Trillium Trillium erectum
    $17.98 Sale $8.99
    Per Bag of 3
    Native Red Trillium is a beloved woodland wildflower with stunning, three-petaled burgundy flowers that float above a whorl of bright green leaves. Also known as Purple Trillium and Wake Robin, the flowers are some of the first to appear in spring and last for just under one month before forming berries that wildlife snack on. Prefers moist shade and rich soil and will naturalize over time. (Trillium erectum)
    Learn More
  3. Painted Trillium, Trillium undulatum, Wake-Robin

    Painted Trillium is an enchanting woodland wildflower, with delicate white petals and a magenta-red center burst. Native to the northern woods, each plant produces a single bloom tha...

    Learn More
    Painted Trillium Wake Robin, Painted Lady Trillium undulatum
    $17.98 Sale $8.99
    Per Bag of 3
    Painted Trillium is an enchanting woodland wildflower, with delicate white petals and a magenta-red center burst. Native to the northern woods, each plant produces a single bloom that sits atop three whorled leaves. Painted Trillium prefers acid soils but can adapt itself to sweeter, more alkaline soils as long as it is given a good amount of shade and moisture. (Trillium undulatum)
    Learn More
  4. Yellow Trillium, Trillium luteum, Wake Robin

    Yellow Trillium has stunning, rich green leaves spotted with silver. Its bright yellow blooms appear in the center of each leaf, with the petals rising upward. (Trillium luteum)...

    Learn More
    Yellow Trillium Yellow Wake Robin Trillium luteum
    $17.98 Sale $8.99
    Per Bag of 3
    Yellow Trillium has stunning, rich green leaves spotted with silver. Its bright yellow blooms appear in the center of each leaf, with the petals rising upward. (Trillium luteum)
    Learn More
  5. Sweet Betsy Trillium, Toadshade Trillium, Trillium cuneatum

    Sweet Betsy Trillium, aka Toadshade, is a perennial native wildflower that blooms during the spring. A small deep burgundy flower blooms from the center of the three main leaves. Lea...

    Learn More
    Sweet Betsy Trillium Toadshade Trillium, Wood Lily, Sweet Betsy Trillium cuneatum
    $17.98 Sale $8.99
    Per Bag of 3
    Sweet Betsy Trillium, aka Toadshade, is a perennial native wildflower that blooms during the spring. A small deep burgundy flower blooms from the center of the three main leaves. Leaf patterns vary, but include shades of forest green, light green, and silver that together resemble the coloring of a toad’s skin—hence the common name. A beautiful addition to woodland or shade gardens in zones 5-8. (Trillium cuneatum)
    Learn More

Trillium: End of Season Care

Dividing & Transplanting: Trillium don't like to be disturbed and can be hard to divide and transplant successfully, especially from your forest. However, it can be done. In your shade garden, you can dig and divide your own trilliums. Mark where your trillium are growing in the spring.

In late summer, after they go dormant, carefully dig the rhizomes, getting as much of the root system as you can. Gently separate out the individual rhizomes and replant in a location similar to where they were growing well. Keep watered, especially if you have dry conditions.

Digging trilliums you planted in your own forest is harder and less successful because the rhizomes often are growing in among tree roots and other plants. Removing the whole root system without significant damage can be difficult.

Pests/ Disease: Trilliums have few pests and diseases. In the shade garden, watch for slugs and snail damage on the leaves in spring. To reduce damage, remove the mulch away from the plants in spring to reduce hiding places for the slugs. Place organic baits, such as iron phosphate, around the area. The slugs and snails are attracted to this bait, but once they eat it, the iron phosphate will kill them. It is safe for kids, pets and wildlife.

White Trillium in bloom on woodland floorWhite Trillium in bloom on woodland floor
<a href="/perennials/woodland-wildflowers/white-trillium">Trillium</a> is one of the earlier woodland blooms to be found in spring.

You can also use beer traps. Sink a shallow bowl (or empty tuna fish can) in the soil, so that the rim is positioned at the soil line. Fill it 3/4rds with beer. Each evening the slugs and snails will drown trying to drink the beer. Clean out the bowl each morning. Keep your dogs away from the beer trap because they might like to taste it too.

In the forest, deer may browse on the plants, but usually this damage doesn't kill the plants. If you have a special species you're trying to protect or a new planting, cover it with chicken wire in spring after it emerges.

Trillium: Extra Info

Many trillium species are considered endangered so you should never divide or remove wild trillium from public forest or private lands. Always buy trillium plants and rhizomes from a reputable nursery.


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