In Louisiana, hydrangeas are entirely cold hardy and love a sunny environment. By Allen Owings
My latest mail delivery included a white hydrangea. It lacked instructions for planting. Please, could you assist me with this? Would planting it in a container be a better option to keep it safe during the winter? Cynthia Sevin
In a few weeks, in late October or November when the temperature cools off, you can plant the hydrangea. Put it somewhere it can get the majority of shade and water in the interim. Here, hydrangeas are entirely cold hardy, and the winters are not cold enough to harm them. Do keep in mind that because they are deciduous shrubs, losing their leaves over the winter is typical. In the event that this occurs, don’t panic. The flower buds for the following year are already formed, therefore refrain from trimming the bush. A position with morning light and afternoon shade is ideal for hydrangeas; an eastern exposure is recommended. Before planting, prepare the space by digging a few inches of organic material (compost, composted manure). It should be planted such that the top of the rootball is level with the bed’s soil. Then, add a few inches of mulch to the space surrounding the plant. The following summer will be hot and dry, so drink water as needed.
Can you grow hydrangeas in Louisiana?
06/15/18) The LSU AgCenter has chosen Limelight (Hydrangea paniculata Limelight), a superb new hydrangea, as a Louisiana Super Plant. Limelight hydrangeas give hydrangeas in our landscapes a completely new aspect and way to be used. This hydrangea wasn’t grown in your grandmother’s yard.
In Louisiana’s gloomy gardens, garden hydrangeas (Hydrangea macrophylla) have a long history of use. Huge flower heads in shades of light pink, pink, rosy red, lavender, light blue, bluish purple, or white bloom above the lush green leaves from late April through July. For many years, garden hydrangeas have been the most popular variety grown in our settings.
Limelight is a member of the entirely distinct hydrangea paniculata species. This kind of hydrangea, often known as panicle hydrangeas or PeeGee hydrangeas, has been grown for many years in the northern United States. However, the Gulf Coastal South hasn’t seen many of them planted there. The panicle hydrangea was thought not to grow well down here. However, that was incorrect.
I was hesitant to suggest an unproven plant even though I was aware of a few paniculata hydrangeas that had been thriving successfully in Louisiana for the previous 20 years. And local nurseries typically did not have them in stock. With the introduction of the Limelight hydrangea, everything has changed.
Although it is new to Louisianan gardeners, the Limelight hydrangea has been cultivated for a while. In the 1980s, it was chosen from a breeding programme in Holland. However, it was not until Proven Winners took it up and began to promote it that its availability began to grow. Promotion was well handled by Proven Winners. Limelight hydrangeas appeared out of nowhere in retail nurseries in Louisiana.
First, disregard the majority of your knowledge regarding hydrangea gardening. Hydrangeas in a panicle are particularly distinctive. These are significantly larger than garden hydrangeas, robust-growing shrubs or even small trees. The typical H. paniculata can grow to be at least 15 feet tall. Despite being a more compact variety, Limelight eventually develops to reach 6 to 8 feet tall and broad, though routine pruning can keep it at a smaller height.
While panicle hydrangeas like Limelight flourish in broad sun to part shade, garden hydrangeas require shade to thrive in our climate (six to eight hours or more of direct sun). Although planting these hydrangeas in full light sounds strange, it works well for them. Plants that are placed in excessive shadow do not bloom as well and are not as full and stocky as garden hydrangeas.
Limelight hydrangeas can be cultivated in containers, beds, or even as solitary plants. Make sure the soil is properly prepared and the bed drains adequately before you plant anything in it (raised beds work well). Before planting, add 2 to 4 inches of compost to the top 8 to 10 inches of soil. Verify that the root ball’s top is either level with or slightly higher than the soil’s surface in the bed.
Dig a hole three times the diameter of the root ball when planting a single plant. Place the plant in the hole after removing it from the container. The soil that was taken out of the hole should be mixed with a good amount of compost. Fill in the area surrounding the Limelight hydrangea with this. After giving it a good soak, mulch the area.
Keep in mind that they are huge plants when putting them in a container. Select a sizable, perhaps 10-gallon container, and plant it there using a high-quality potting soil.
Limelight hydrangeas don’t require as much watering after they are established as garden hydrangeas do. When it’s hot and dry outside or when you see the bushes are starting to droop a little, water deeply once or twice a week. Avoid overwatering. The only significant issue is root rot, which is brought on by excessively frequent watering after planting. A little bit of soil drying should occur between irrigations.
When compared to garden hydrangeas, limelight and other panicle hydrangeas bloom later and have a smaller spectrum of colours. Late May or June marks the start of limelight blooming. The huge, spectacular flower heads have the shape of cones. The colour changes from a cold, celadon green to a creamy white and then, in the late summer or fall, to an old rose. The only colour in which this species blooms is white, but as the flowers ripen, they take on colours of pink to rosy red that give them a whole new dimension. Months pass with the flowers maintaining their beauty.
The stunning floral show that these plants provide, whether they are planted as a single plant or as a hedge, will stop visitors in their tracks. When cut for interior arrangements, the flowers are stunning and can be dried by hanging them like garden hydrangeas.
Hydrangeas called Limelight should be pruned in late winter or early spring. On new growth, this hydrangea blooms. If plants are cut back by about a third in February or March, they will be more shaped and will bloom better.
Can you grow hydrangeas in South Louisiana?
A Louisiana Super Plant that will give your yard “wow factor” is limelight hydrangea. The soil affects the colour of hydrangea flowers; acidic soil produces blue blooms while alkaline soil produces pink blooms. Bigleaf hydrangea Merritt’s Supreme loves partial sun and requires regular watering, especially in extremely hot weather.
When do hydrangeas bloom?
There are many different varieties and shades of hydrangeas (Hydrangea macrophylla). Some hydrangeas start to bloom in the spring and stop in the middle of the summer, while others start to bloom and keep on blooming until the end of the season. Some hydrangeas only flower on young wood, while others only do so on aged wood. The best approach to guarantee that you’ll see flowers all summer long is to select one or more varieties with contrasting traits. Although hydrangeas enjoy the heat and sunlight of the summer, they still require the kind of tender love that will prevent them from wilting when you want them to bloom.
Why haven’t the hydrangeas bloomed this year?
Lack of sun and lack of time are the two most typical, fundamental causes of hydrangeas not blooming. Make sure one of these two problems isn’t the cause of your problem before continuing your enquiry.
Although they can thrive in partial sunlight, hydrangeas need at least 4-6 hours of direct sunlight and an additional 4-6 hours of indirect sunlight each day.
Time is the second typical cause of hydrangeas not blooming. Many people demand rapid gratification from their gardens, but that is unattainable. Perennial plants take years to mature, according to Standard. It can take a hydrangea 2–5 years after planting before it blooms, depending on the variety.
If your hydrangea is at least a few years old, receives plenty of sun, and is not flowering, it may be time to investigate further.
How are hydrangeas pruned in Louisiana?
Hydrangeas have experienced a recent return in popularity. I think the cause is due to newly created variations that increase the flower’s colour range, types with longer bloom times or varieties that bloom later in the season, and plants that thrive in full sun environments.
Climbing vines, floral bushes, and tiny trees make up the hydrangea genus. Along with two evergreen self-supporting climbers, the Gulf South is home to five of the eleven deciduous species. Hydrangea macrophylla, H. serrata, H. quercifolia, H. paniculata, and H. arborescens are cultivable hydrangeas. Decumaria and Schizophragma are the rarely observed vine relatives.
The ball-shaped “mophead form” of H. macrophylla is the floral shape that is most recognisable. The vibrant blooms are really sepals, which are modified leaves that entirely conceal the much smaller, less-obvious fertile flowers. There are other varieties, such as “Endless Summer,” “Pia,” “Alpenglow,” and “Nikko Blue.” The small, fertile flowers of the “lacecap variant of H. macrophylla and H. serrata are conspicuously displayed in the centre of the head, surrounded by the considerably bigger, vibrant sepals. The “Lady in Red,” “Mariesii Variegata,” and “Blue wave” varieties of lacecap are a few examples. H. serrata comes in the “Bluebird,” “Preziosa,” and “Tokyo Delight” varieties. The panicle, which is large at the base and taper towards the top, is the third variety of hydrangea flower. H. quercifolia and H. paniculata both exhibit this form frequently. Choose a location for your hydrangeas where there is some afternoon shade. A bed that is partially shaded (approximately four hours of direct sun) or shaded (two hours of direct sun) is best. Avoid lying in mattresses that have been cooked by the midday sun or other hot, dry areas. These plants considerably prefer morning sun, therefore an eastern exposure is ideal. The exceptions are H. paniculata and H. arborescens, both of which like light shade and a sunny garden, respectively.
The best hydrangea beds are those that have been extensively treated with organic matter, such as compost, rotting manure, or peat moss. When preparing the bed, incorporate a two to four inch layer of organic material. The organic matter aids in keeping the soil moist. Hydrangeas need to be watered frequently once they are planted. While they are establishing themselves, water them firmly and thoroughly two or three times each week, and if the weather is dry later on, once or twice per week. In order to keep the soil around their roots moist, hydrangeas also benefit from a two to three inch layer of mulch, such as leaves, pine straw, or pine bark.
Hydrangea flower heads are pretty distinctive. The colour of the sepals can vary according on how acidic or alkaline the soil is that the plant is growing in. Every year in March and again in October, apply aluminium sulphate to the soil surrounding the plants if you have pink hydrangeas and want them to be blue. The most intense tints of blue, purple, and lilac will emerge in soil with a pH level of 5.5 to 6.0. The colour of the flower heads will gradually and eventually change totally.
If your hydrangeas are blue and you want them to be pink, use the same timetable to treat the soil surrounding the plants with lime and perhaps superphosphate. The pH of your soil sample should be between 7.0 and 8.5 to produce the most vibrant pink to red tint. It might not start working fully for a few years. Genetics determines the color’s intensity, which is influenced by the variety you are cultivating. White hydrangeas are white regardless of the pH of the soil because they lack colour in their sepals.
The best time to prune your plants is when the bright flower heads turn green. First, remove the faded flower heads and four to six inches of stem from each. Cut the heads with longer stems if you want to make your bush smaller. Continue pruning shoots to get the desired results unless there are any particularly tall shoots or if you need to chop the bush back completely to lower its size. A fuller, more sculpted bush results from pruning, which encourages new growth. By the end of July, this kind of pruning must be completed. Since the majority of hydrangea species’ types (quercifolia, macrophylla, and serrata) set their bloom buds for the following year in late summer, any pruning done after then lessens or completely eliminates the flowers for the following year. Reblooming H. serrata and macrophylla cultivars include ‘Endless Summer,’ which blooms on both fresh and old wood, extending the flowering season.
Before new growth forms, prune H. arborescens and H. paniculata each year in late winter. Cutting H. arborescens stems close to the ground produces robust stems that may support the plant’s enormous flower heads. There are two varieties: “Annabelle” and “Hayes’ Starburst.” H. paniculata can be kept as a dense blooming shrub with stems that are less likely to break during a thunderstorm by pruning it close to the ground. Included among the varieties are “Tardiva,” “Unique,” “Pink Diamond,” and “Limelight.”
Keep in mind the native oak leaf hydrangea. It also merits attention for shaded regions of your landscape with its enormous, pointed cones of white blooms that mature to dusty rose and its dark green, appealing leaves. Oak leaf hydrangeas are deciduous and grow bigger than normal hydrangeas (up to six feet tall), with the added attraction of orange-to-burgundy fall colour. This particular variety of hydrangea appears to be the most challenging to cultivate and establish in the landscape. It requires a soil with good drainage. Included among the varieties are “Dayspring,” “Snow Queen,” “Sikes Dwarf,” “Semmes Beauty,” and “Snowflake.”
In full bloom is the Hydrangea quercifolia “Snowflake” at the Aldridge Botanical Garden in Hoover, Alabama, which is south of Birmingham. Panicles hang from upright stems and have double, white flowers on them.
Teller “Red Start” or H. “Rotschwanz” conspicuously exhibits a lacecap’s broad, vibrant sterile sepals encircling the interior, less showy fertile flowers. Depending on the pH of the soil, sepal colour can range from red-magenta to blue-purple.
The name “Lady in Red” for the lacecap comes from the red stem, petiole, and leaf vein colouring as well as the burgundy rose blossoms that dangle downward as the plant ages.
When do hydrangeas bloom?
The type, cultivar, planting zone, and hydrangea blooming season all affect when they bloom. The majority of hydrangeas with new growth form buds in the early summer in preparation for blooming the next spring, summer, and early fall. Hydrangeas may stop flowering in the heat of the summer in hot locations, but they will blossom again in the fall.
How do you cut back hydrangeas?
Hydrangea plants don’t require pruning if they are allowed plenty of room to develop in the garden. Only the periodic clearance of dead wood is necessary.
Do you need to deadhead hydrangeas?
Your hydrangeas will continue to bloom into the fall if you deadhead them. Hydrangeas make wonderful cut flowers, so there’s no need to wait until the flower wilts. Leave the early fall blossoms alone so they can fade naturally. In the days leading up to your freeze date, you don’t want to promote new growth.
How do you control hydrangea color?
The distinction of hydrangeas is that you can modify their colour. But keep in mind that not all hydrangea varieties can change their colour. H. macrophylla, a species of bigleaf hydrangea, responds to changes in soil pH. Hydrangeas can absorb aluminium thanks to a low soil pH, which gives the blossoms a lovely blue hue. Reduce the pH of your soil by mixing in sulphur or peat moss to enhance the number of blue hydrangea flowers. Throughout the growth season, you can keep amending your soil with extra aluminium sulphate. When you add ground limestone to boost the pH, pink and red blooms shine.
You may precisely modify your hydrangea colour using a soil pH test. To avoid the plant from being harmed, keep the pH level below 7.5. In the fall, all hydrangeas will naturally fade regardless of the modifications you’ve made. Don’t worry, the plant will display vibrant, new blossoms once more in the spring.
Can hydrangeas grow in shade?
Although they won’t blossom in complete shade, hydrangeas prefer dappled or infrequent shade. How much sun do hydrangeas need is more important to consider than whether they love the sun or the shade. Your hydrangeas require more sunlight the further north in your garden you are. A general guideline is six hours of sunlight each day. However, southern hydrangeas can thrive with just three hours of sunlight per day.
Can hydrangeas grow in full sun?
While hydrangeas prefer morning sun, they struggle in the hot, afternoon sun. For these gorgeous creatures, partial shade in the later hours of the day is optimal.
Can you grow hydrangeas in pots?
Even if you don’t have enough room in your garden to cultivate hydrangeas, you can still enjoy these lovely blossoms by learning how to grow hydrangea in a pot. As long as you follow the fundamentals of caring for hydrangeas, the procedure is rather straightforward. Select a pot with at least an 18-inch diameter to accommodate the mature size of the particular hydrangea you are growing. In order to maintain the constant moisture level that hydrangeas demand, look for non-porous containers. Excess water will be able to adequately drain thanks to drainage holes. Consider growing dwarf hydrangeas like Buttons ‘n Bows, Mini Penny, and Little Lime.
How do you keep hydrangeas from wilting?
Morning irrigation on a regular basis can assist stop withering. Some hydrangea cultivars simply can’t stand the heat. No matter how much water you give them, they will begin to wilt in the afternoon heat. Mulch applied in layers can help soil retain moisture and stay cool. You shouldn’t be concerned if your hydrangeas bloom again once the day cools. A little midday wilting is preferable to overwatering and drowning your hydrangeas.