The perfect mountain perennial with huge fiery flowers on a compact plant.

May 15, Don’t plant it too deeply, as is key for any new tree. Follow the Watters planting guidelines 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. Companion Plants with Purple Robe Locust for a Stunning BackyardEstimated Reading Time: 4 mins. Robinia pseudoacacia‘Purple Robe’ -- ‘Purple Robe’ Black Locust Page 3 Other Figure 3.

Foliage of ‘Purple Robe’ Black Locust. Roots: surface roots can lift sidewalks or interfere with mowing Winter interest: tree has winter interest due to unusual form, nice File Size: KB. Jul 13, Prune purple locusts in the fall or winter when the tree is dormant, advises the University of Utah, as spring pruning will cause the tree's sap to bleed.

Diseases to keep an eye out for when.

Singleton holds a master's degree in musicology from Florida State University and is a member of the American Independent Writers.

Oct 15, Tree Care: Moderate. Early pruning needed to train a good shape; pruning needed less frequently with age. Tolerance: Drought (once established), any soil, some shade, and medium winds.

Special Considerations: Overwatering after 3rd year may cause rangy growth. Too much pruning promotes unnatural branching structure.

In the spring, usually in May through early June, the purple robe locust tree produces fragrant pinkish-purple flowers on hanging racemes that may be up to 8 inches in length.

Purple-robe trees don't do well in soil that is poorly drained or permanently wet. Healthy trees usually don't need pruning, but if it becomes necessary, avoid pruning in spring when wood tends to.

May 03, I have a beautiful 15 – 18 ft ‘Purple Robe’ tree and everyon in my neighbourhood loves it, as do I. I t is in a large flower bed and currently is doing fine, but in recent years I have been finding volunteer seedlings that are Robinia, but would they likely be the white flowered original sopecies or would these by chance be true ‘Purple Robes’.Estimated Reading Time: 5 mins.