Hydrangeas in Nikko Blue bloom atop aged wood.
Simply put, old wood is wood from the previous year. On stalks that have been part of the plant since the previous year, flower buds on hydrangeas that bloom on old wood are set in the late summer.
The mophead, bigleaf (macrophylla), lacecap, and oakleaf kinds of hydrangea bloom on ancient wood.
These gorgeous shrubs require very little pruning. If you must, though, knowing when and where to trim is crucial. That’s because the less flowers you have the following summer, the more old wood you take.
To keep your old wood hydrangeas healthy and vigorous, take the following three steps:
- Pruning flowering stems back to a pair of sound buds should be done as soon as possible after blooming, but no later than July.
- Remove weak or broken stems during the winter or early spring pruning. The oldest stalks should only be removed in thirds, cutting them to the ground.
- To maintain the shape of your shrubs and revitalize them, repeat the method each summer.
What hydrangeas grow on both aged and young wood?
Bigleaf hydrangea is the Southern Belle of hydrangeas, boasting beautiful, glossy foliage and stunning ball-like flowers. Large mopheads, like those of “Big Daddy” and “Dear DoloresTM Hydrangea,” and delicate lace-caps are the two principal flower varieties in this varied group. Depending on the pH of the soil, the bigleaf hydrangea’s flowers can change color from blue to pink and are superb cut flowers.
Ideal Conditions for Bigleaf Hydrangeas
Morning sun and afternoon shade are ideal conditions for bigleaf hydrangea growth. They demand well-drained soil and an abundance of water. They are hardy to zone 5. Avert exposures to the sun. Plant as showy specimens or accents, or plant in large quantities for a magnificent display. Bigleaf hydrangeas thrive in containers as well.
Pruning Bigleaf Hydrangeas
On aged wood, bigleaf hydrangeas blossom. After plants have finished blooming and strong new branches have emerged from the plant’s base, prune in the summer. Old and new weak shoots should be removed by cutting them at the base. Leave both sturdy new branches that will flower the following season and a number of stems of old, fruitful wood.
Do hydrangeas always develop on aged wood?
The variety that forms buds on “aged wood” is the one that is most frequently discovered in gardens. This comprises varieties of Mophead, Big Leaf, and Lacecap hydrangeas (Hydrangea macrophylla), as well as the Oakleaf variety (H. quercifolia). On aged wood, they all create blossoms.
On fresh or old wood, Limelight hydrangeas will grow?
Once established, limelight hydrangea trees can thrive in a variety of soil types and are drought-tolerant, making them low-maintenance and practically hassle-free.
Sun and shade
Depending on the climate zone they are cultivated in, Limelight hydrangea trees require different amounts of sunlight. They require moderate shade and around four hours of direct, unfiltered sunlight every day in zones 7-8 that are warmer. They benefit most from full sun, or at least six hours of daily direct, unfiltered sunshine, in the cooler zones 4-6.
Soil
Although limelight hydrangea trees may grow in a wide range of soil types, they prefer an acidic to neutral pH. No of the soil type, it needs to drain well. Wet feet are not good for these trees. The pH of the soil does not influence the color of the blooms like it does with certain other kinds.
In cold locations, cover the roots of your Limelight hydrangea with a 2-3 inch layer of mulch to protect them from the winter chill.
Watering
Water the soil every week to ten days to keep it consistently moist. Only water your Limelight hydrangea when the top two inches of soil are dry. Do not overwater. You can check for moisture by sticking your index finger into the nearby dirt.
Pruning
Every year, before the emergence of new growth, you should prune your Limelight hydrangea tree. This can be done in late winter or early spring. To promote new growth, cut your Limelight hydrangea back annually by a third of its total height. Remember that Limelight hydrangeas only produce flowers on fresh wood, so avoid mistakenly removing any flower buds.
Trim any branches that you see that are diseased, damaged, or dead all year long.
Are hydrangeas able to bloom on fresh wood?
You can prune hydrangeas paniculata and aborescens more severely without losing this year’s blossoms because they bloom on new wood. Although pruning is not necessary, if it is not done the plant will grow taller, with the majority of its flowers at the top.
Cut back to a healthy framework
Trim the previous year’s growth back to a strong framework that is between 30 cm and 60 cm high in the early spring. On each stem, prune to just above a pair of sound buds. For large flowers, prune back to the lowest healthy buds; less firmly for a more natural appearance or a higher plant.
Watch Monty Don describe the many hydrangea trimming techniques in spring:
Do hydrangeas from Endless Summer bloom on rotted wood?
For those of us who live in northern climes with more severe winters, The Endless Summer series represents a milestone in hydrangea breeding.
Older hydrangea kinds only produced flowers on old wood or stems that had grown the previous year. All flowers for the following season were gone once that growth was destroyed due to harsh winter circumstances, damage, or unintentional autumn trimming.
The plants in the Endless Summer series are significantly more adaptable in the environment because they bloom on both new and old wood. The plants won’t generate many, if any, buds on the growth of the current season, though, if the plants are not properly nourished in the spring.
Any Endless Summer variety will grow best in an easterly direction or in a spot in the garden that receives morning sun and afternoon shade. To make a richer soil that will store nutrients and fertilizers better and retain more moisture, use a decent compost.
Use Plant-tone and granular lime for purple to pink blossoms or Holly-tone and holly for blue flowers when fertilizing your Endless Summer Hydrangeas in the spring.
We advise fertilizing in April, May, and June with 1 cup of fertilizer for every foot of branch spread for the optimum flowering. For instance, 9 cups of fertilizer would be applied over a three-month period to a plant that is 3 feet broad. After this time, fertilizer shouldn’t be used to plants.
Continual Summer Fall is not the time to prune hydrangeas. Rather, only prune them in May. This will guarantee that the flower buds that survived the winter have opened.
Plants marked with a number sign (#) and a number are generally the same size as gallon pots; for example, #2 is equivalent to a 2 gallon pot, #3 to a 3 gallon pot, and so on. These plants are offered for sale in pots.
Plants with a height (such as 5-6′) give an estimate of the plant’s present height.
Plants that are measured in inches (such as 2.5″) are identified by their caliper, or trunk width.
Plants are typically larger when measured by caliper (inches) than when assessed by height (feet).
What kind of wood does anabelle hydrangea prefer to grow on?
This plant may also be known to many of you as the Annabelle hydrangea. Pruning can be done in late winter or early spring because this type also blooms on new wood.
Hydrangea quercifolia, often known as oakleaf hydrangea:
This hydrangea, which is well-known for its oak-shaped leaves, blooms on old wood, so unless you absolutely must prune, wait until after the plant has completed flowering for the year.
(Hydrangea petiolaris) Climbing
Hydrangeas that climb are really unusual. Depending on the variety, they can grow to be 70′ tall! You shouldn’t prune this hydrangea unless you need to keep it smaller in size because it blooms on old wood.
We hope this clarifies some of the ambiguity surrounding whether or not to prune your hydrangeas. We welcome your inquiries below and look forward to meeting you at the nursery soon.
How can you identify the difference between hydrangeas with old and new wood?
Identifying whether hydrangeas will bloom on old wood or fresh wood is the first step in figuring out the optimal time to prune them. Here is a list of each definition; we explain which is which below. (We assure you that this is not as horticulturally nerdy as it sounds.)
“Typically pruned after flowering or early fall to promote new flower buds on old stems, old wood refers to buds that form for next year’s bloom at the end of the current growing season on stems created during the previous summer.
“Stems that have grown during the current growing season are referred to as new wood. During the current growing season, buds begin to form on this new growth. In order to promote new stems, pruning is typically done in late winter or early spring.
Don’t worry if your time is off. These plants are tolerant. Without blooming for a season, you might still anticipate flowers the next year if you plan ahead.
Hydrangeas should be pruned at a 45-degree angle just above a blossom. Typically, a leaf or leaves are linked to the stem at this location.
What distinguishes lacecap from mophead hydrangea?
Bigleaf hydrangeas, also known as Hydrangea macrophylla, are the most popular variety of hydrangea. French hydrangea, garden hydrangea, and florist’s hydrangea are some more frequent names for this plant. Most likely, the hydrangeas at your neighborhood florist are bigleaf varieties.
Bigleaf hydrangeas come in three different varieties:
- Due to their huge, puffy bloom heads, mophead hydrangeas are the most recognizable and well-liked hydrangeas. They flourish in hardiness zone 6, and their blossoms can be purple, blue, or pink. Mophead hydrangea flower buds may not endure the winter since they are susceptible to the cold.
- With their flowers being the main distinction, lacecap and mophead hydrangeas are nearly identical to one another. They have little, fruitful flower buds in the middle, and the showy flowers surround the flower head’s margin. The main function of these gorgeous, sterile flowers is to entice bees and butterflies to the fertile buds in the middle. They flourish in hardiness zone 6, just like mophead hydrangeas do.
- The least frequent variety of bigleaf hydrangeas are mountain hydrangeas. Its scientific name is Hydrangea serrata, and while its flattened heads resemble those of lacecap hydrangeas, its flowers and leaves are much smaller. Mountain hydrangeas are a fantastic alternative for locations with late winter cold snaps because they have hardier buds and do well in hardiness zone 5.
True to its name, the bigleaf hydrangea’s trait that sets it apart from other hydrangea varieties is the size of its leaves. The leaves of bigleaf hydrangeas can get up to 4-6 long and 3-5 broad. The leaves have short stalks, are heart-shaped, thick, and lustrous.
Bigleaf hydrangeas like some shade, but not too much, as this can lead to fewer flowers. They prefer moist, well-drained soil, and their blooming seasons are in June and July. Given that bigleaf hydrangeas are drought-sensitive, it is crucial to consistently water them.
By adjusting the soil’s acidity, you can vary the color of your hydrangeas. Blue flowers can be grown on acidic soil with a pH of 5.5 or below. Pink flowers will grow on neutral or alkali soils with a pH of 6.5 or higher. Purple flowers or a hybrid of blue and pink flowers will grow in soil with a pH between 5.5 and 6.5.
How can you distinguish between new and old wood hydrangeas?
Because of its stunning blossoms and general ease of maintenance, hydrangeas are a particularly popular landscape plant. However, there is a lot of misunderstanding regarding hydrangea maintenance and how to keep them looking their best. We discussed change-color hydrangeas previously, so we’ll focus on trimming now.
Despite the fact that they are all related, their growth and blooming patterns differ. Some hydrangeas exhibit pH-dependent color changes, and some flower on this year’s new growth (referred to as new wood) while others do so on last year’s growth (referred to as old wood). Everything relies on the type of hydrangea you have, so it’s important to know what you have and to keep the plant information card close at hand.
When to Prune Hydrangeas
Hydrangeas that flower on old wood can be pruned as soon as the flowers have faded. Plants that bloom on new wood can be pruned in late winter or early spring. Hydrangeas can be divided into six different categories: Macrophylla (Bigleaf), PeeGee (Paniculata), Oakleaf (Quercifolia), Smooth (Arborescens), Mountain (Serrata), and Climbing (Anomala petiolaris).
The majority of hydrangeas don’t actually need to be pruned. They will still grow happily and have a lovely appearance if you don’t prune them, but you can prune them to regulate the shape, manage the size, and eliminate dead wood.
Bigleaf, Oakleaf, Climbing, and Mountain Hydrangeas bloom on old wood and can be clipped as soon as the flowering period is through before they start pushing out buds for the following year.
To regulate the size and shape of the plant and promote new development, you can remove a few of the older, thicker stalks each year. The next season’s blossoms will be abundant if you only remove a couple of the oldest and heaviest stalks.
Smooth and panicle hydrangeas can be pruned in late winter or early spring and bloom on new wood. A little pruning in the spring may promote more blossoms. These varieties survive very rigorous pruning to manage the growth of the shrub.
The most important thing to keep in mind is that, in all honesty, hydrangeas don’t require any pruning. They can be deadheaded or not. They can be pruned or not. Keep pruning to a minimum if you want big shrubs.
How Can I Tell If My Hydrangea Blooms on Old or New Wood?
The quickest method is to look for your variety’s name on the tag. However, if you’ve lost the tag or it’s become completely unreadable, there are a few other indicators that can tell you if your hydrangea blooms on new or old wood.
Your hydrangea probably blooms on old wood, and spring pruning would have eliminated the buds, if you pruned it in the spring and it did not bloom that summer. Your hydrangea blooms on new wood if you cut it severely in the spring and it still blooms that year.
When your plant is blooming, inspect it; you ought to be able to tell the difference between old and new wood. New wood will be considerably more flexible, supple, and should still have a greenish tinge, but old wood should be stiffer, tougher, thicker, and more grey or brown in color.
Additionally, you can examine your hydrangea in the fall to see if any buds have already begun to emerge. It blooms on old wood if there are already buds on the branches. If there aren’t any buds in the fall, it will force them out the following spring on new growth.
If your shrub isn’t blooming, don’t get discouraged; just leave it alone for a couple of years. Sometimes a variety of environmental conditions might influence the creation of blooms. It might benefit from some time alone if nothing else in order to begin blooming the following season. If that doesn’t work, you can have other problems with the blooms like irrigation, sunlight, or soil conditions.