A fascinating rebloomer, the Pistachio Hydrangea delivers gorgeous color combinations from late spring to fall. The colorful blooms emerge as chartreuse green with pink undertones. The pink gradually turns to a violet crimson and takes over as the flower ages, retaining hints of chartreuse-green.
The cherry on top of this vibrant plant sundae is a tiny blue eye located in the middle of each blossom. The Pistachio dwarf hydrangea retains a compact size and shape while growing quickly. This colorful flowering bush excels in small, shaded spaces and is truly a champion.
Key Features
- long blooming period The gorgeous blooms on this small mophead hydrangea will last for months. Between late April and the first frost, the Pistachio Hydrangea blooms.
- amazing color This hydrangea’s blossoms, which come in hues of green, pink, red, purple, and blue, provide a striking contrast.
- lover of shade. A little shade is preferred by the Pistachio Hydrangea. For those who have a dull, shaded place that might use some vibrant floral power, this is wonderful news.
- easy to maintain. Pruning is not necessary, and the Pistachio hydrangea doesn’t have any major disease or insect issues.
- wonderful for containers. This small hydrangea is perfect for planters because it matures to a height of 3 feet and a width of 3 to 5 feet.
Pro Tip: The Pistachio Hydrangea blooms reliably year after year even after the worst winter since it produces flowers on both new and old wood. With the Pistachio Hydrangea shrub, you never have to be concerned about missing a year of blooms.
In growing zones 5 to 9, place this versatile hydrangea in a location with slightly acidic soil and partial shade.
If hydrangeas aren’t flowering well, it could be because of inappropriate pruning the previous year, poor fertilization, or the plant’s poor position.
Viburnum, loropetalum, and hostas all complement this shrub beautifully. Plant in masses or groups, as a specimen, a screen, or a hedge, in perennial and shrub borders, or as a foundation planting.
Planting
Planting hydrangeas is best done in the spring and fall. In regions where the earth is diggable, dormant hydrangeas can be planted in the winter. Planting season is then in places with moderate summers.
The Pistachio hydrangea prefers moist, nutritious soil that is well-drained and receives partial to full sun.
Watering
In the summer and the first year after planting, keep the soil wet but not waterlogged. This hydrangea will thrive with a deep watering once a week in hot weather for the duration of its life.
For hydrangeas, mulching at a depth of around 2 inches is strongly advised. Mulching will reduce your plant’s requirement for watering and protect it from harsh weather.
Do hydrangeas bloom on fresh growth?
Some hydrangea species, known as “old wood,” bloom on growth from the previous year. The flower buds that will bloom in the upcoming summer are present in this old wood. We would have a plant without flowers this year if we pruned in the winter or spring because we would lose the flower buds. As a result, many cultivars undergo pruning following summer blooming.
The young growth that appears in the springtime bears flower buds when hydrangeas that bloom on new wood are present. These plants can be clipped in late winter or early spring before new growth starts because the buds are not present during the winter months.
How are hydrangeas pruned to bloom on fresh wood?
On the growth of the current season, hydrangeas that bloom on fresh wood place their flowering buds. They can be pruned virtually any time of year, with the exception of the summer, as their blossoms develop from new growth at the plant’s base. To keep these varieties of hydrangeas healthy and vigorous, follow these three steps:
- To enhance the shrub’s appearance, remove faded blossoms in late summer.
- Older canes should be removed to increase vitality.
- In late winter, before the onset of new growth, completely prune the shrub.
Other tips include leaving some of the older branches to serve as a support structure for new development (these types of hydrangeas tend to open up and get floppy.) Additionally, many gardeners advise trimming bushes all the way back to the ground, as this frequently results in larger blossoms.
Does new or old wood produce flowers for Hydrangea arborescens?
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.
Does fresh or old wood produce flowers on bigleaf hydrangeas?
Many gardeners, both novice and expert, are confused about how to prune hydrangeas. Determine which species are present in your garden before you even consider getting your trimming equipment. In New Hampshire, hydrangeas come in a variety of kinds, and each one has quite distinct growth patterns and pruning needs. Some plants only produce flowers on fresh growth, while others mostly produce flower buds on older wood. To learn when and how to prune your hydrangeas, refer to the short guide below.
The type of hydrangea that most gardeners are most familiar with is the bigleaf variety. Bigleaf hydrangeas, often known as mopheads or lacecaps, are distinguished by their glossy, dark green foliage and enormous, vibrant blooms. In New Hampshire, it might be difficult to get them to flower because they often grow on old wood. A plant may have luxuriant foliage but no blooming buds because of the cold winter temperatures and drying winds.
At the tops of stems on old wood from the previous year, flower buds are created. Although lower buds along the stem have the capacity to grow blooms as well, the hydrangea’s blossoming potential is decreased if those buds are died or damaged throughout the winter. Wait until new growth sprouts in the spring before pruning your bigleaf hydrangeas. Approximately 1/4 inch above the first group of live buds, prune the plant. A hint: the interior of living stems will be green, whereas the interior of dead stems will be brown. Cut completely dead stems flush with the base.
Consider replacing your bigleaf hydrangea with a “remontant (reblooming) variety if you have difficulties getting it to bloom consistently year after year. In recent years, a number of cultivars that blossom easily on fresh shoots have been introduced.
Bigleaf hydrangeas and mountain hydrangeas have a striking resemblance and are closely related. Compared to their relative, mountain hydrangeas have more delicate branching and less ostentatious blossoms. Because flowers only grow on old wood, wait to prune stems until the spring when new growth starts and you can identify which buds are still healthy.
Native to Eastern North America, smooth hydrangeas fit in well with most gardens in New Hampshire. They have mounded growth patterns and mid-summer blooms of white to pale pink flowers. Smooth hydrangeas, in contrast to bigleaf and mountain varieties, bloom on young wood and may withstand severe pruning. From late winter until early spring, you can remove dated flowers from the previous year. The flowers on old stems will bloom, but they will be modest. In the spring, trim stems all the way to the ground for bigger, more vigorous blossoms.
The panicle hydrangea is without a doubt the most popular variety planted in New Hampshire. It is extremely cold hardy and blooms consistently from season to season. It develops into a tall, low-branched little tree or broad shrub, with branches that frequently arc under the weight of its numerous, enormous conical blooms. Panicle hydrangeas should be clipped in late winter or early spring before the emergence of the leaves because they blossom on new growth. To enhance the general structure and habit of the plant, remove wasted blossoms and prune. Make cuts to the branch collar of stems or one quarter inch above living buds.
The Southeastern region of the United States is home to oakleaf hydrangeas. Despite the possibility of winter damage and flower bud loss in northern gardens, this shrub’s eye-catching foliage and exfoliating bark are sufficient reasons to cultivate it. Removing dead or broken branches should only be done in the spring because oakleaf hydrangeas also bloom on old wood. Oakleaf hydrangeas often don’t need a lot of pruning. After fresh growth has started, thin stems as necessary and shorten the plant’s height.
By making simple trimming mistakes, many well-intentioned gardeners lower the potential blooming of their hydrangeas. Fortunately, hydrangeas are actually pretty easy to maintain as long as you are aware of their growth patterns and adhere to these straightforward pruning instructions.
Does ancient wood support hydrangea blooms?
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.
What does it indicate when fresh wood blooms?
The secret to success is timing the pruning of your plant. You’ll undoubtedly miss the plant’s flowers for that season if you cut a flowering shrub at the wrong time of year. Even if the plant will return and bloom once more the next year, this is not the end of the world. The major reason why most people avoid pruning their shrubs is probably the possibility of missing out on a season’s worth of flowering. The good news is that trimming shrubs improperly nearly never results in plant damage.
If your shrub flowers on new wood or on old wood, you need to know when to prune it to avoid disrupting its blooming cycle. These two phrases are frequently used, however they are rarely clarified in clear language. This is what they signify:
When a plant flowers on fresh wood, it signifies that it does not produce bloom buds until after spring growth has started. The flower buds that will later bloom that year will be developed by the shrub’s new growth—or rather, the new wood—that season. Usually, flowers appear later in the growing season on plants that flower on new wood. Roses, Rose of Sharon, Panicle Hydrangea, and Butterfly Bush are a few examples of plants that flower on new wood (see photo “Miss Molly” at left).
When a plant grows on old wood, it is forming the flower buds for the upcoming year’s blossoms now. On the old wood from last year’s growth, the buds are carried through the winter. These plants start developing the flower buds for the following year as soon as they finish blooming. Typically, plants that bloom on old wood do so early in the growing season. One extremely significant exception to this rule, though, is the bigleaf hydrangea found in the Cityline or Let’s Dance series. On aged wood, they bloom from mid to late summer. Forsythia, lilac, and weigela are a few further examples of plants that bloom on ancient wood (picture Show Off, below right).
The majority of your pruning should be done in the spring, but which part of spring? Early in the spring, while new growth is starting, you can prune plants that flower on fresh wood. They have plenty of time to recover from pruning while still producing flower buds that will blossom in that season as a result. This should be done after the stems have sprouted buds but before they enlarge. By pruning before the buds leaf out, you can identify where the healthy new growth is located and prevent the plant from wasting energy on buds that you will eventually have to remove.
After flowering is complete, plants that flower on old wood can be trimmed. The flower buds will be lost if you cut the plants before they bloom. They might not have enough time to produce flower buds for the following year if you wait too long after their blooming period is through.
Several reblooming plants are available from us, including the Bloom-A-Thon azalea, Sonic BloomTM weigela, and Bloomerang lilac. The optimum time to prune reblooming plants is right after their initial wave of bloom, which happens on the old wood. Because reblooming plants can flower on both old and new wood, this is the greatest time to prune them. This gives them plenty of time to put on new growth in preparation for their rebloom while also allowing you to enjoy their spring display. They only need a light trim to put on new growth after their initial bloom, but don’t worry if you fail to do it—you’ll still receive a fantastic second show!
You may always remove any dead or damaged wood from a shrub. Just make sure it is dead before you do it! It can be easy to believe a plant is dead or has to be pruned, especially in the early spring, but it’s best to put the pruners away and wait to see if any buds appear. Damaged wood can also be removed at any time, as well as growth that obstructs walkways or makes it difficult to get to a particular part of your yard. All of the other pruning recommendations are secondary to safety.
Keep in mind that trimming is not always necessary for shrubs to perform effectively and blossom. Skip the pruning if you’re unsure what to do or if the plant’s size and performance last year satisfied you.
Many customers ask why their hydrangeas aren’t blooming. The primary reasons hydrangeas don’t bloom are incorrect pruning, bud damage due to winter and/or early spring weather, location and too much fertilizer.
There are hydrangea kinds that bloom on either fresh or old wood, or even both. Both new and old wood are the growth of the following year (spring), respectively.
- Consider that this year, you bought a Nikko Blue Hydrangea. For the next year, Nikko’s produce blooms in the fall. Your Nikko is therefore creating blooms this fall that will blossom in the spring.
- Therefore, you wouldn’t want to completely prune your Nikko Blue Hydrangea this fall while you are pruning your perennials. Pruning the Nikko Blue Hydrangea this fall would effectively mean cutting off your hydrangea flowers for the upcoming spring.
- The idea behind Endless Summer, a hydrangea variety that blooms on both old and new wood, is that the plant will set blooms this fall to blossom not only in the spring of the following year, but will also keep producing blooms in the spring of the following year to extend the blossoms into the summer.
- Once more, pruning your Endless Summer hydrangea in the fall would mean removing some of the flowers that would blossom in the spring.
The hydrangea’s plant tag will indicate whether it blooms on fresh wood, old wood, or both. It is typically preferable to wait until spring to prune your hydrangeas. As the plant grows, you’ll see stems that are fragile when bent and lack any leaves. Since these stems are dead and won’t produce any flowers, they should be clipped close to the plant’s base.
The second reason why your hydrangeas aren’t blooming is probably the weather. Buds of hydrangeas are extremely susceptible to cold. Therefore, it is a good idea to wrap your hydrangea for the winter if it is an old wood hydrangea. Keep in mind that old wood hydrangeas establish their blooms for the following spring in the fall. Therefore, you won’t have blossoms in the spring if the fall-produced buds are frozen in the winter.
You can wrap anything with regular burlap. Burlap should be wrapped around the plant and filled with mulch or leaves after the first hard frost and after the hydrangea’s leaves have dropped. In order for the buds to survive the winter and sprout the following spring, the plant receives insulation from this. Never wrap your hydrangeas in plastic. When warmer winter days arrive, the plant cannot breathe since plastic, unlike burlap, doesn’t breathe. As a result, the plant can heated to such high temperatures that it cooks within the plastic and perishes.
The second most frequent weather-related cause hydrangeas do not blossom is late spring killing frosts. We saw really chilly temperatures in April both this year and last year after beautiful spring days. When springtime temperatures drop below freezing, hydrangeas need to be covered with an old beach towel or sheet. Because of the temperature dip, there won’t be any blossoms.
The majority of hydrangeas require at least 3 to 4 hours of light per day to bloom. The best light is in the early morning, midday light is acceptable if it is dabbled light rather than beating sun, and afternoon sun is typically too hot. Check the plant label, though. Newer hydrangea cultivars are being created that can withstand more sun exposure time and sun intensity. A hydrangea in full sun will require much more watering than one in diffused light, so keep that in mind.
High nitrogen fertilizer should not be used to feed hydrangeas. Nitrogen is indicated by the first number on the fertilizer ratio. (The ratio stands for N, P, and K) For healthy leaves and general good growth, some nitrogen (N) is required; however, a ratio of 8-16-6 or any similar combination with a higher middle or phosphorus (P) value is preferred. The growth of roots and shoots is encouraged by phosphorus, which improves the blooming process.
Potash (K), the third element’s last quantity and the lowest ratio, is for plant hardiness. Because hydrangeas prefer acidic soil, they can be fertilized with fertilizers designed for such plants. Hydrangeas only require fertilizing twice a year, once in early spring and once in mid-summer. To avoid root burn, make sure the soil is always moist before applying a fertilizer.