Purple Robe Locust Tree

As low as $73.99 was $99.99
Availability: In stock

Fast Growing, Flowering Purple Robe Locust Tree

  • Fragrant, Wisteria-like Purple Flower Clusters
  • Fast Growing
  • Mid-Sized Ornamental Flowering Tree
  • Easy to Grow
  • Excellent, Hard-Wooded Street Tree

A fast-growing, hard-wooded, easy-care, extremely ornamental native tree? We literally can't keep this tree in stock!

Purple Robe Locust Tree (Robinia pseudoacacia 'Purple Robe') is an improvement of the native Black Locust tree.

It's become incredibly popular because of the great purple flower color and excellent fragrance. But once established, tough Purple Robe Locust trees are also super hardy and drought tolerant with a brisk growth rate of 2 or 3 feet of growth each year.

Purple Robe Locust trees develop incredible, long clusters of purple colored flowers in mid- to late spring that look very much like Wisteria flowers. These beautifully fragrant clusters cover the tree profusely and may be up to eight inches long each!

It is an impressive display, and you will definitely want to cut a few and bring them indoors to enjoy in a cut flower arrangement.

This improved variety is much less thorny than its predecessor but keep an eye out because it's common for this tree to grow a few thorns. 

It's time for you to jump on this. We ALWAYS sell out of this incredible native tree and this year will be no exception.

How to Use Purple Robe Locust in the Landscape

Our horticultural team has put together recommendations on how to best use this tree in your landscape:

1. This tree is an excellent barrier plant to protect your property beautifully.

2. You can plant this tree as an easy-care, fast-growing specimen in the lawn. Mow the grass right up to the trunk to keep the plant as a single stem.

3. They will grow just about anywhere and makes an excellent small yard tree, needing little fertilizer or much of anything else.

4. Purple Robe Black Locusts make great street trees, too, handling the tough conditions by your road with ease. Purple Robe Locust trees are very hard wooded and will tolerate storms well.

5. The beauty of this mid-sized ornamental tree is that they can grow in just about any condition as long as the soil drains quickly after a rain. Even in poor, infertile soils the plants seem to do well.

Don't wait for your chance to own this gorgeous tree, order now!

Easy Care Native Tree

Have you ever noticed a group of white-flowering trees blooming in mid-spring along pasturelands and fence lines? They are growing beautifully without any care in poor soils, with open exposure, and where little additional water would ever get to them?

This is likely a native tree called a Black Locust (Robinia pseudoacacia) and they have been widely planted into the East Coast, Midwest and into the Southern parts of the country. The native species blooms in mid-late spring and the flowers are white and fragrant.

The variety 'Purple Robe' features beautiful, fragrant purple flowers. Bees and beneficial insects love the flowers.

Each spring, the leaves emerge reddish bronze, before maturing to dark blue-green. The large compound leaves have smaller blue-green leaflets, and you'll love the fine-textured look of the tree in summer.

Fall clean up is easy with these small leaves, too!

#ProPlantTips for Purple Robe Locust Tree

As with any plant, proper site selection is key to success and to YOUR happiness. Plant Purple Robe Locust in an open, sunny space where it will get plenty of light and air circulation.

Establish it the first year with careful watering. Don't plant it too deep, as is key for any new tree. Follow the guidelines in the Plant Highlights for the best results.

Pruning Tips

Timing is important! Wait until late spring, when the flowers are done blooming, before making any cuts. You won't want to miss any of the show.

Be sure to place your order as soon as you see this gorgeous tree in stock. We have people waiting for their chance to own the Purple Robe Locust tree. Order today!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

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Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 19.99
20 - 49.99 21.99
50 - 69.99 24.99
70 - 99.99 29.99
100 - 129.99 34.99
130 - 149.99 41.99
150 - 150+ Approx 27%

Click here to see our full rates


Purple Robe Locust Tree Is Suited to Grow in Zones 4-8
Growing Zones 4-8
More Information
Brand Nature Hills' Choice
Botanical Name Robinia pseudoacacia 'Purple Robe'
Mature Height 30 - 40 feet
Mature Spread 20 - 30 feet
Sun Exposure Full Sun, Partial Shade
Soil Widely Adaptable
Moisture Widely Adaptable
Growth Rate Fast
Flower Color Purple
Foliage Green
Pollinator Friendly Yes