Why didn’t your hydrangeas bloom this year? Most likely they were either pruned at the wrong time of year or their flower buds were damaged by winter weather or foraging deer.
With so many species and numerous cultivars, hydrangeas confuse many gardeners and even landscape designers when it comes to understanding the best time of year for pruning. Many gardeners prune at exactly the wrong time, eliminating almost all flower buds for the entire season.
Most early blooming shrubs, including some hydrangeas, develop their flower buds during the summer and fall of the previous year. This is known as blooming on old wood. Other hydrangeas develop their flower buds in the spring every year, then bloom later in the season. This is called blooming on new wood. Hydrangea cultivars such as Endless Summer™ bloom on both old and new wood.
Panicle hydrangea (Hydrangea paniculata) and smooth hydrangea (Hydrangea arborescens) develop their flower buds on new stems (new wood). Therefore they can be pruned back severely in the late fall or early spring to manage their size, and they will still provide flowers. Even after exceptionally cold winters where stems are killed to the ground, new spring stems will produce flowers. In our climate and soils, panicle hydrangea and smooth hydrangea are typically the easiest species to grow and provide the best show. Panicle hydrangeas, for instance, can bloom from July through October.
Common panicle hydrangea cultivars include: Limelight’, Vanilla Strawberry, Little Quick Fire, ‘Grandiflora’ aka PeeGee, ‘Fire and Ice’, Bobo®, ‘Bombshell’, ‘Little Lamb’, Quick Fire®, ‘Pee Wee’; Pinky Winky®, ‘Praecox’, and ‘Tardiva’. You can recognize them by their cone-shaped flower heads.
Common smooth hydrangea cultivars include: ‘Annabelle’, Invincibelle Spirit®, Incrediball®, and ‘Grandiflora’.
By contrast, hydrangeas that bloom in the spring bloom predominantly on old wood from flower buds that were formed during the previous summer and fall. They include bigleaf hydrangea (Hydrangea macrophylla), oakleaf hydrangea (Hydrangea quercifolia), mountain hydrangea (Hydrangea serrata) and climbing hydrangea (Hydrangea anomala subsp. petiolaris). These varieties should be pruned immediately after the flowers start to fade. You can cut off the just the flowers or cut the stem at any point you need to in order to control the size and shape of the shrub. If you prune later in the year, you’ll be removing next year’s flower buds.
If you know the type of hydrangea you have in your garden, it can take some of the mystery out of understanding why they’re not blooming as you expected, and knowing when to prune them. If you do not know what type of hydrangea you have, do not prune them. Remove only the dead wood in spring, then wait until they bloom to determine when to prune them the following year. If they’re planted in a favorable position in your landscape, they’re well worth waiting for.
One of my passions is lifelong learning, and another is to help people — and plants — who appreciate sustainable garden design and maintenance. I’m proud to have continued my studies at the New England Wildflower Society and earned an Advanced Certificate in Native Plant Horticulture an Design.
Each graduate had the opportunity to make a presentation about the required community service aspect of their certificate. I was proud to share my story of one of the two eyesore sites that I re-designed (and helped to install) at the Easton Town Offices that had been long overdue for a landscape makeover.
I’m excited to continue to be a valuable resource in my community. While I currently serve as Horticulture Co-Chair with both the Sharon and Easton, MA garden clubs, I look forward to future opportunities to collaborate, create and educate people about smart, sustainable landscapes.
Imagine that when you were a child your parents loved gardening, and over time you helped your family create secret gardens and woodland paths that changed daily with new sprouts pushing up from the earth, turning into a bounty of ever-changing blooms, and you loved every petal and leaf of it all.
Now, imagine that you’re middle aged and still living in that same beloved 1950’s ranch, but you’re ready to tear it down to build your dream home, and save as many of your family’s horticulture heirlooms as possible. You’ve come to appreciate that many of the plants your family selected and nurtured are quite unique.
Sharon, MA homeowners in this situation called in Carol Lundeen, owner of Garden-911 Boston, for landscape renovation consulting and horticulture services to help them make their decisions. The excavation crew was expected to start in a couple of days, and we needed to establish priorities, make a plan, and get a move on.
How do you decide which heirloom plants to keep and which to abandon to the dumpster? Here’s how we worked together:
First, we contrasted the emotional and financial value of various plantings. The client had many childhood memories in specific areas of the property, especially around the patio, past the boxwoods (Buxus sp.) and up the path into the woodland, past the doll’s eyes plants (Actaea pachypoda). There was also the giant Wygelia whose branches arched over the front door entryway, and if it could talk it would tell more than half a century of stories.
I reminded the client that financially it costs money to remove existing plantings (and manage their debris); to lift and temporarily relocate and care for existing plantings, then replant and reestablish them; and to purchase (plant selection and delivery) and install and establish new ones (site preparation and irrigating). Existing shrubs on the property were mostly well established beauties that would be costly to replace with same-size specimens, and perennials seemed to be everywhere. This client kept her sense of humor and broad perspective of the past and future, she asked lots of questions and we figured everything out together.
While he was already on the property, we had the excavator dig a trench in well-protected areas in the front and rear of the property, and with machines he lifted and placed many of the larger shrubs into the trench. Garden-911 Boston carefully backfilled by hand, irrigated, and mulched these specimens for the best possible outcome. Perennials were dug together by hand by the client and Garden-911 Boston owner Carol Lundeen, and we placed them into a long-overgrown garden area that we first had to clear of all manner of wild invasives vines and weeds, fallen-down raised beds and tangled chicken wire as the mini-excavator went to work nearby.
Eventually, as in all renovations, comes a period of being okay with not knowing when enough is enough. But most all very important plantings are safely stashed for the fall and winter, and spring will bring a new house and new possibilities for the client’s heirloom plants to re-establish in their new places. We’ll be working on the design together over the winter.
When a Sharon homeowner wanted to meet about redesigning her front yard gardens, Garden-911’s Carol Lundeen suggested expanding the vision to include improved circulation from the driveway to the front door, adding ease of use and curb appeal at the same time.
Here’s an example of using contrast as a visual principle of landscape design. In the foreground of this scene in Cambridge, MA, leaves of a variegated dogwood tree contrast along a diagonal with the pink flowers of a blooming azalea shrub in the middle ground, while in the background the curly-edged rumpled leaves of perennial geraniums anchor as a groundcover.
In addition to contrast, other principles of landscape design include unity and harmony, balance, hierarchy, scale and proportion, dominance and emphasis, and similarity and contrast. Design elements such as color, line, shape and volume, texture and pattern, space the illusion of space, motion and the illusion of motion and value can be combined as ingredients in a recipe that creates the various design principles that make a design a visual success.Other elements of a successful landscape design are functional, such as circulation around a home and its grounds, and water management.
Garden-911 Boston offers landscape design services. Visit https://www.garden-911.com/ or call 617-327-9254 for more information.