Panicle hydrangeas, also referred to as PeeGee, are strong plants with exceptional hardiness and drought tolerance. They can survive the sweltering summers in the deep South and the bitter winters in the north. Despite their enormous blooms, these hydrangeas are among the easiest to grow. Show-stoppers like Moon DanceTM and White Wedding Hydrangea compete favorably with bigleaf types.
Ideal Conditions for Panicle Hydrangeas
Panicle hydrangeas can withstand a variety of soil types and are hardy to zone 4. In full sun to partial shade, plants thrive, and sun promotes the best flowering. To help plants take root, water them well in the first season. Perfect for containers as well as massing and hedging.
Pruning Panicle Hydrangeas
Panicle hydrangeas can be cut in the winter or early spring before new growth appears because they bloom on new wood. Although pruning is not required, it can encourage more flowering. Panicle hydrangeas can withstand severe trimming to keep their size and are occasionally made into trees.
How can I tell whether the wood my hydrangea is growing on is new or old?
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.
On fresh or old wood, do Endless Summer hydrangeas bloom?
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).
Does hydrangea serrata produce flowers on fresh wood?
Light/Watering: The majority of types prefer midday shade in the South but flourish in full sun in the North. Plants should not be grown in hot, dry, exposed locations; moist soils that do not dry out are desirable. Mulch helps to stabilize soil temperatures and preserve moisture.
Fertilizer/Soil and pH: For some cultivars, the color of the flowers is influenced by the soil’s pH; blossoms in low pH (acidic soils) will be blue, while those in higher pH will be pink. Deep, bright blues typically result from a pH below 5.0, however as the pH rises, blooms can range from blue to lavender to mauve to a vivid deep pink at pH 7.0. (neutral). Aluminum availability in the soil is dependent on pH; in acidic soils, aluminum is more easily obtainable, which contributes to the blue hue of the flowers. Using a fertilizer low in phosphorus will help you grow blue blooms because this nutrient binds up aluminum in soils. If you want pink flowers but your soil is acidic, all you have to do is add lime to boost the pH and use a balanced fertilizer. If you want blue flowers, aluminum sulfate will cause the pH to decrease.
To learn more about soil testing in your area, we advise you to contact your cooperative extension service. For a list of organizations taking part in the Cooperative Extension program, see this page.
No significant diseases or pests. The foliage can occasionally become infected with powdery mildew, especially in humid places with poor air circulation. If the issue is severe, use a suitable fungicide and be sure to rake up and remove all fallen foliage in the fall.
Pruning: Only minor pruning is required, but by the end of August, trim back stems by about one-third if shrubs are too big. Prune only the dead wood in the spring. On aged wood, the majority of Hydrangea serrata types bloom. A variety called H. s. Tuff StuffTM produces flowers on both old and new wood. If no fall pruning was done, stems can be trimmed down by a third in the spring if necessary, although doing so would prevent shrubs from blooming until late summer and will sacrifice the old wood’s ability to blossom.
Young plants can be moved when they are dormant in the early spring; once established, it is more difficult to transport bigger tree-form kinds. After transplanting, prune the top growth to minimize water loss.
End-of-Season Maintenance: Remove and burn any fallen leaves that has powdery mildew or other fungi on it.
Remove any dead wood from all kinds in the early spring. Check the pH of the soil and change it if necessary to achieve the desired blossom color. To promote blooming, feed plants with a phosphorus-rich fertilizer (such as 15-30-15). Transplant any necessary items before the leaves unfold.
Mulch plants in the middle of spring when the soil has warmed up to retain moisture and moderate soil temperatures. Observe for powdery mildew and take necessary action.
Summer: Cut off old flowering stems as soon as the blooms start to fade. By the end of August, prune as necessary in the manner described above.
Fall: Get rid of any powdery mildew-infected leaves that has fallen to the ground. Plants might be shortened or pruned all the way to the ground if they are not pruned in the spring.
Do they bloom on old wood, new wood or both?
The most challenging aspect about hydrangeas is that they come in a variety of floral forms:
On fresh wood, panicle and smooth hydrangeas bloom (growth created in the current season). After the plant leaves out in the spring, flower buds form and blossom a few months later in the summer. Because of this, these plants reliably bloom every year, regardless of how chilly the winter was.
Climbing, bigleaf, mountain, and oakleaf hydrangeas bloom on aged wood (growth created in the previous season). Flower buds start to form in the late summer and must remain dormant throughout the fall, winter, and spring for the summer to come. Therefore, these plants won’t bloom if:
- They are cut back. Potential flower buds will be removed by pruning at any moment.
- Deer will consume the flower buds as they wander through them.
- The weather has harmed them. The issue isn’t with winter weather; rather, flower buds are more vulnerable to harm in the spring when many days of warm weather are followed by a rapid freeze.
Big leaf and mountain hydrangeas that rebloom, also known as remontant hydrangeas, have the unusual capacity to bloom on both old and new wood. The plant can still flower on wood it generates in the winter even if the weather damages the buds. The Let’s Dance series and Tuff Stuff are reblooming cultivars.
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.
Does ancient wood support Limelight hydrangea blooms?
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.
Does aged wood support zebra hydrangea blooming?
Compact, deciduous Zebra Hydrangea has dark green, serrated leaves on black stalks. Regardless of the acidity of the soil, its lacecap flowers on ancient wood open green and grow to a brilliant white. Pollinators and butterflies are drawn to the flowers. Rich, moist, well-drained soils with moderate sun are ideal for flowering.
How do I determine whether my hydrangea is eternal summer?
A Quick Look at Endless Summer Hydrangeas
- Both new and ancient wood can bloom.
- Pink or blue flowers are possible.
- tolerant to the cold.
- Long summer to fall blooming season.
- may be cultivated in a container.
- prefer shady areas when it’s warmer.
Does the Tiny Tuff Stuff hydrangea prefer new wood or old wood for blooming?
Zones 4 to 9 are suitable for Tuff Stuff hydrangeas, same like other H. serrata cultivars. Although they prefer some afternoon shade in warm climes, they may thrive in full sun to part shade. The timing of pruning has little impact on flowers because they produce blooms on both old and new wood.
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.