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Hardiness Zone: 4-8
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Mature Height: 30-40 Feet
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Mature Spread: 20-30 Feet
Buy Purple Robe™ Black Locust online. This small, tough native tree is prized for its fragrant purple panicles of flowers that appear from mid to late spring. Additionally, ‘Purple Robe’ is incredibly tough, super hardy, and drought tolerant. This variety is relatively thornless, although the occasional thorn may be found. This tree thrives in a variety of difficult conditions and is great as a street tree, too. Use this tree to add the wonderful wisteria-like flowers without the agressive vining habit of wisteria.
Family: Fabaceae
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Common Name: Locust
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®.
We 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.
PURPLE ROBE™ BLACK LOCUST Plant Characteristics
Bark Color*
| • | Brown |
| • | Tan |
Bark Type*
| • | Rough |
| • | Thorny |
Cultural Information*
| • | Leaf Scorch – Moderate Resistance |
| • | Leaf Spot – Moderate Resistance |
| • | Powdery Mildew – High Resistance |
| • | Root Rot – High Resistance |
Flower Color*
| • | Lavender |
| • | Purple |
Flower Type*
| • | Fragrant |
Fruit Type*
| • | Non-Edible Fruit |
Growth Habit*
| • | Ornamental/Medium Growing |
Growth Rate*
| • | Fast |
Leaf Color Fall*
| • | Dark Yellow/Gold |
| • | Light Yellow/Brilliant Yellow |
Leaf Color Spring*
| • | Green |
Leaf Color Summer*
| • | Green |
Leaf Type*
| • | Deciduous/Herbaceous |
Nature Assets*
| • | Attracts Bees |
| • | Attracts Birds |
| • | Attracts Butterflies |
| • | Deer Resistant |
Plant Type*
| • | Tree |
Preferred Planting Season*
| • | Fall Planting |
| • | Spring Planting |
| • | Summer Planting |
Preferred Soil Conditions*
| • | Adapts Well to Most Soil Types |
| • | Average |
| • | Drought Tolerant |
| • | Moist |
| • | Prefers Low pH (Acidic Soils) |
| • | Salt Tolerant |
| • | Tolerates High pH (Alkaline Soils) |
| • | Tolerates Low pH (Acidic Soils) |
| • | Well-Drained |
Propagation Methods*
| • | Cuttings or Divisions |
| • | Seed |
Season of Interest*
| • | Early Spring |
| • | Fall |
| • | Late Spring/Early Summer |
| • | Late Summer/Early Autumn |
| • | Spring |
| • | Summer |
| • | Summer Flowering |
| • | Winter |
| • | Year-Round |
Sun Exposure*
| • | Prefers Full Sun in Northern States |
| • | Prefers Full Sun in Southern States |
Uses*
| • | Accent Plant |
| • | Cut Flowers |
| • | Landscape Specimen |
| • | Near Water Gardens or Ponds |
| • | Privacy/Hedge/Living Fence |
| • | Provides Shade |
| • | Rock Gardens |
| • | Under Power Lines |
| • | Understory Planting |
Exposure (Short)
| • | Full Sun |














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