Diabolo® Ninebark Tree Form is a dramatic ornamental tree prized for its deep burgundy foliage, soft pink-white spring flowers, and distinctive peeling bark. Grafted into a tree form, it creates a bold architectural focal point while delivering season-long color and texture. Excellent for foundation beds, entrances, and high-impact landscape designs.
Key Features
Deep burgundy-purple foliage
Unique tree form habit
Pink-white spring flowers
Attractive exfoliating bark
Strong season-long color contrast
Specs
Mature Height: 6–10 ft (depending on graft height and pruning) Mature Width: 5–8 ft Sun: Full sun (best color) to part shade Growth Rate: Moderate to fast Zone: 3a; 3b; 4a; 4b; 5a; 5b; 6a; 6b; 7a; 7b Form: Tree form / rounded canopy
Spacing Guidance
6–8 ft spacing
4–6 ft off structures
Best used as:
Foundation focal point
Entry accent
Specimen ornamental tree
Why Choose Ornamental & Accent Trees?
Spring Flower Impact: Cherries and serviceberry deliver standout blooms that define the season.
Fall Color & Seasonal Interest: Ginkgo and serviceberry provide reliable, high-impact color late in the year.
Form & Structure: Weeping, upright, and spreading forms create focal points and visual balance in the landscape.
We grow and source ornamental trees selected specifically for New England performance — not just appearance, but reliability, structure, and long-term success in local conditions.
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Randy Cheney
I was very happy with my experience! Pro Growers are not only a quality outfit, but they have the best prices hands down!
Pro Growers of New England, Inc
Randy Cheney
Top notch service and product quality. I didn’t know what to expect seeing the ads on Facebook, so I went to the greenhouse. They had a wonderful variety of products and a very helpful staff. The delivery and installers were fast, neat and friendly. Pro Growers will be me go to for now on!
Emerald Green Arborvitae
Cynthia Boardman
Starting with the owner, who gave us expert advice, along with a great group of installers, this company was a pleasure to work with.
Fair prices and great product. You can’t go wrong
Installation Service ($25)
Kayla Sem
Easy ordering, delivery and installation! Highly recommend ordering from Pro Growers of New England.
Green Giant Arborvitae
sara garcia
Great price, fast delivery. Thank you!!
Emerald Green Arborvitae
Growzone Finder
It helps us recommend plants that are best for your local climate, based on your growing zone. Also, because we ship plants based on when they are best for your local climate, it allows us to give you a more accurate estimate of when your order will ship.
The two gentlemen that did the arborvitae installation were absolutely excellent. They listened to exactly what we wanted, mapped out the spots, and worked quickly and thoroughly to get it done. Outstanding work!
Top notch service and product quality. I didn’t know what to expect seeing the ads on Facebook, so I went to the greenhouse. They had a wonderful variety of products and a very helpful staff. The delivery and installers were fast, neat and friendly. Pro Growers will be me go to for now on!
