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Shipping Restrictions for Cold Climate States

Due to the timing of our mid–to–late November peony shipping window, checkout has been disabled for customers in Maine, Vermont, Minnesota, Montana, Wyoming, and North Dakota, where frozen ground conditions are more likely at that time.

Customers in these states are welcome to contact us directly to place an order manually so we can review local conditions and timing together. This helps ensure plants arrive when planting or storage conditions are appropriate and avoids unnecessary refunds or shipping delays.

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Green Monster Peony - Lactiflora 3-5 eyes

Green Monster Peony - Lactiflora 3-5 eyes

Regular price $255.00 USD
Sale price $255.00 USD
Sale Sold out
Shipping calculated at checkout.

Peonies ship mid–to–late November 2026 (dormant bare-root).

By placing an order, you acknowledge and accept this shipping window and assume responsibility for proper storage if soil is frozen at delivery. This timing primarily affects Zone 5 growers; most climates have workable planting windows throughout winter. 

Fall shipping is standard for bare-root peonies and ensures the healthiest divisions.

Peony ‘Green Monster’ (Swenson Gardens, 2021)

Not loud. Not frilly. Not predictable.

‘Green Monster’ defies expectations — not with sheer volume, but with detail. Its 5" semi-double to double blooms open in pale ivory, infused and streaked with fresh green, especially through the center of the petals. The effect is almost painterly — like a botanical ink wash that changes slightly flower to flower.

Petals are softly ruffled, lightly twisted, and shallowly notched to a frilled edge, forming a loose double overall. Occasionally, pollen-bearing yellow stamens appear. Carpels are typically underdeveloped (usually two, moderately hairy). Fertility remains unknown.

It’s fragrant. It’s upright. And it reaches an impressive 40" without typically needing support. Midseason blooming, it steps into the garden at just the right moment — late enough to feel intentional, early enough to anchor the show.

In the field, it grows with calm precision. In the vase, it’s a conversation starter.

Why You’ll Love It
  • Unique ivory blooms with prominent green streaking

  • Semi-double to loose double form

  • Fragrant midseason bloomer

  • Strong, upright stems to 40″

  • Collector-worthy but garden-strong

Plant Details
  • Cultivar: Green Monster

  • Group: Lactiflora

  • Originator: Swenson Gardens

  • Release Date: 2021

  • Country: USA (MN)

  • Seedling No.: RAHS 7

  • First Bloomed: 2014

  • First Propagated: 2014

  • Height: 40″ (101 cm)

  • Bloom Size: Approx. 5″ (12 cm)

  • Bloom Season: Midseason

  • Fragrance: Yes

  • Fertility: Unknown

About Hybrid Peonies

Released by Swenson Gardens in 2021, ‘Green Monster’ represents modern hybrid breeding — intentional crosses designed to combine strength, bloom timing, resilience, and distinctive form.

While traditional lactifloras are known for reliability and elegance, hybrids often push form and color boundaries while maintaining strong garden performance. ‘Green Monster’ may look unconventional, but it grows with the dependability serious growers expect.

Unorthodox bloom. Solid horticultural logic.

And yes — it absolutely belongs in the garden.

 

Photo Credit: Groot and Groot


Mid-to-Late Nov 2026 Shipping

Updated March 9, 2026: Current Peony Stock ships Mid-to-Late Nov 2026. Peonies ship mid–to–late November 2026 as dormant bare-root divisions.

By placing an order, you acknowledge and accept this shipping window and assume responsibility for proper storage if soil is frozen at delivery. In many areas of the U.S., brief warm spells allow for planting well into December. Peonies actually benefit from winter chill, and if freezing temperatures are a concern, planting holes can easily be prepared ahead of time.

Guarantee

We guarantee our plants are healthy, and true to variety. We are so confident that we offer a conditional warranty for the growing season.Click here to read the complete policy.

Grow & Care

Peonies are long-lived plants that can thrive for a century or more. The root system of a peony is not only large, it's also quite different from that of most other perennials. Peonies have two types of roots. Fine, fibrous ones that absorb water and nutrients, and tuberous roots that are as thick your finger and very brittle. The thick ones are actually underground stems with “eyes” that sprout new shoots.

Planting:

Since some of a peony’s roots are actually underground stems, it’s important not to plant them too deeply. There should be no more than about an inch of soil covering the upper-most roots. If they are deeper than that, you will get a robust plant, but very few flowers.

During the first growing season, the soil will gradually settle around the newly-planted roots. Sometimes this results in the roots sitting deeper than intended. If this happens, gently lift the roots so they are at the correct level. If you decide to mulch the area, keep the root zone right under the plant bare. Dig hole at least twice the width of your roots to reduce soil compaction. 

Care:

Once your peony plants mature, you can cut as many stems as you like. But during the first few years, it’s best to cut just few stems and let the plants retain as much of their foliage as possible. This will give them the maximum amount of energy to bulk up their root system.

When the plants finish blooming, use scissors or sharp pruning shears to cut off the dead blossoms. Try to do this before the seed pods form. Remove the flower as well as about 6” of the stem. This will allow the rest of the foliage to hide the cut stems.

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