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RULE OF PLUM DAYLILY

Image property of and used with permission from Walters Gardens
Image property of and used with permission from Walters Gardens

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#6973

RULE OF PLUM DAYLILY

Hemerocallis x 'Rule of Plum'

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Eco gallon Potted (SKU: 20810)
0 - Available Now - Details   -  

List Price $25.00 Per Plant

Hardiness Zone: 3-9   ·   Mature Height: 20-27 Inches   ·   Mature Spread: 18-24 Inches

Rule of Plum Daylily delivers a level of garden drama that few perennials can match. Its 3-inch blooms open in a deep purple shade, creating a luxurious display that feels velvety in the landscape. Before the flowers even unfold, the nearly black-purple buds provide a striking ornamental feature that adds contrast and anticipation. As one of the darkest purple daylilies available, this variety offers a distinctive color in traditional perennial plantings. Its rich tones add depth and sophistication to sunny borders, cottage gardens, and mixed perennial combinations.

Rule of Plum is an early summer flower that brings vibrant interest to the garden just as the weather heats up, making it an excellent choice for starting the daylily season ahead of schedule. Its abundant blooms appear above compact and tidy green foliage, creating a polished display without requiring much attention.

Follow the Rule of Plum and deliver maximum visual impact in a manageable footprint. Pair it with silver foliage plants, white flowering perennials, golden grasses, or bright yellow blooms to create complementary combinations that highlight its deep purple flowers. Like other daylilies, it adapts well to a variety of soil conditions and temperature. Its combination of unusual flower color, early-season performance, and compact size make Rule of Plum an easy addition to any garden or landscape.

RULE OF PLUM DAYLILY Plant Characteristics

Flower Color*
Dark Purple
Dark Yellow/Gold
Multi-Colored
Purple
Yellow
Flower Type*
Single Blooming
Growth Rate*
Fast
Leaf Color Fall*
Green
Light Yellow/Brilliant Yellow
Leaf Color Spring*
Green
Leaf Color Summer*
Green
Leaf Type*
Deciduous/Herbaceous
Plant Type*
Perennial
Preferred Planting Season*
Spring Planting
Summer Planting
Preferred Soil Conditions*
Adapts Well to Most Soil Types
Average
Drought Tolerant
Moist
Well-Drained
Propagation Methods*
Cuttings or Divisions

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RULE OF PLUM DAYLILY Homeowner Growing & Maintenance Tips

  • Recommended Soil:
    • Grows well in average, fertile, or moderately poor garden soils.
    • Prefers well-drained soil that allows roots to establish easily.
    • Tolerates acidic, neutral, and slightly alkaline soil conditions.
    • Adding compost can improve soil structure and support healthy growth.

  • Sun Exposure:
    • Full sun encourages the strongest flowering and richest bloom color.
    • Accepts light afternoon shade in warmer regions.
    • Provide at least six hours of direct sunlight for best performance.
    • Good airflow helps maintain attractive foliage throughout the season.

  • Irrigation Needs:
    • Water regularly during the first growing season while roots establish.
    • Established plants tolerate periods of dry weather.
    • Deep watering during drought supports consistent flowering.
    • Avoid constantly wet soil conditions around the crown.

  • Feeding & Nutrients:
    • Apply a balanced slow-release fertilizer in early spring.
    • Compost applications help maintain healthy, productive soil.
    • Avoid excessive nitrogen that may encourage foliage over flowers.
    • Healthy soil typically provides excellent long-term performance.

  • Pruning & Maintenance:
    • Remove spent blooms to keep the plant looking tidy.
    • Cut finished flower stalks back after the bloom period.
    • Remove aging foliage before new spring growth begins.
    • Divide mature clumps as needed to maintain vigor and flowering.

Family: Xanthorrhoeaceae · Common Name: Daylily

FREE with every plant purchased:

  • The Sooner Guarantee: For details, click here!
  • A pre-applied, pre-measured amount of time release fertilizer that keeps your plant well nourished for up to one year.
  • Pre-hydrated Hydro-Gels are included in the top of each container to use when planting as they help retain soil moisture, and plants will establish more quickly with less transplant shock. Plants will also survive drought-like conditions and accidental missed waterings better.
  • Planting and Care Instruction brochure.
  • Catalogs of new and exciting plant brands, such as Garden Debut® and Proven Winners®.

DIY Irrigation SuppliesWe use and recommend www.dripdepot.com for our irrigation needs, from simple to install micro and drip systems, to commercial grade irrigation parts and supplies.

Interesting Notes About RULE OF PLUM DAYLILY

  • Nearly Black Before Bloom: The unopened buds of Rule of Plum create their own display, appearing almost black-purple before revealing the deep violet tones of the fully opened flowers.
  • A Rare Garden Color: True deep purple coloration is one of the most challenging traits for daylily breeders to develop, making varieties like Rule of Plum especially prized among collectors and gardeners.
  • Diploid Heritage: Rule of Plum is a diploid daylily, carrying the traditional chromosome count found in many classic cultivars and contributing to a diverse range of successful breeding lines.
  • Early Season Superstar: Early-blooming daylilies provide valuable color before many later varieties begin flowering, helping create a more continuous sequence of blooms throughout the garden.
  • A Modern Upgrade: Compared with older purple selections such as 'Little Grapette', Rule of Plum was selected for larger flowers and a more intense purple coloration, bringing a fresh look to this beloved color category.