The Central and South American native plant, bougainvillea, is widely grown in South Florida, Arizona, South Texas, and Southern California. Established vines may tolerate a slight frost, but if it gets below 25 degrees where you live, you’ll need to bring them inside for the winter.
Does bougainvillea grow better indoors or outdoors?
In its natural condition, bougainvillea is not your usual houseplant; it is a sprawling climber and shrub with strong thorns that is frequently seen in gardens in subtropical to tropical regions or on the outside of buildings (such climbing up a trellis or over a fence). The South American plant bougainvillea was given that name in honor of explorer and sailor Louis Antoine de Bougainville, who lived in the late 1700s. Bougainvillea grows quickly and is best planted in the spring. It frequently adds more than 36 inches to its length each year. The bougainvillea plant is well-known for its brilliant pink, purple, and orange hues, which most people mistake for its flowers but which are actually petal-like bracts that cover the plant’s actual blossoms, which are often little white or yellow buds.
The shrub is surprisingly simple to grow inside in containers or pots and can survive if the correct conditions are maintained if you don’t live in a warm enough location to grow bougainvillea outdoors year-round.
In the UK, can bougainvillea be grown outside?
Few plants can match bougainvilleas for instant stunning appeal. When our summer sky are overcast, their luminously vivid blossoms are like a doorway into a cozier realm. Although they appear exotic, Bougainvilleas are simply clusters of tiny white flowers surrounded by colorful bracts. Although they appear vivid, all you need to do to grow them in the UK is shield them from cold.
Does bougainvillea regrowth occur annually?
Depending on the cultivar, bougainvillea is a perennial vine that can reach a height of 30 feet. It will grow again in the spring, needs full light, and is root-hardy. On young wood, its bracts “bloom” from May until December. Heavy trimming, a shortage of water, and nitrogen-poor fertilizer promote blooming.
Following are the most typical queries concerning bougainvillea and Kathy Huber’s responses.
A: Hard pruning is possible almost often. Bougainvillea can be pruned all the way to the ground by certain gardeners, but you might just as easily trim 1/3 to 2/3 of the stems. Next, cut the branches to contain it in the future.
A lot of people grow bougainvilleas in pots and give them a serious winter pruning before moving the potted plants inside for safety. Others shape the plant by severe pruning in the spring and then cutting back to the edge of the container or basket after each flowering cycle. Alternately, they pinch the tender tips to promote branching following a flowering cycle.
On fresh wood, bougainvillea blossoms. More color results from pinching and pruning to promote growth.
A. Bougainvillea is a vine that sheds its leaves in the winter and grows new foliage in the spring as the weather warms up. Some people cultivate this plant in baskets or containers, while others grow it as a huge vine that is supported.
The plant can be pruned whenever and to your desired level. Young plants should have their tender tips pinched to encourage a bushier form. After flowering, shape the branches by hard pruning them back to the container or basket edge.
A: I left my bougainvilleas exposed during the freeze. Should I cut them back now, or should I wait until the risk of freezing weather has passed?
A: I prefer to put off pruning because it usually results in a larger plant when I start the growing season. Live wood higher down the stems is somewhat protected by freeze-damaged wood. If you don’t care about this, you can prune now; just be sure to mulch properly to keep the roots warm in the coming cold weather.
A: If it can be sheltered during a freeze, it is safe to transplant in the winter. Transplant in the spring to be safe. Take care not to damage the weak roots. Mulch.
A lot of people agree that bougainvillea colors best when relatively pot-bound. Those positioned in the garden have loads of room for their roots to spread, producing an abundance of green foliage. But it ought to turn color eventually.
Height/Spread:
With assistance, most bougainvillea cultivars may reach heights and widths of 20 to 30 feet. They will grow to a height of 1-1/2 to 2 feet and a spread of 8 to 10 feet if cultivated as a groundcover. There are dwarf kinds that typically reach heights and widths of 3-6 feet.
Color:
The bougainvillea’s actual blooms are fairly small, typically white, and ringed by vibrant bracts. The bracts, which come in hues of red, purple, magenta, hot pink, mild pink, orange, apricot, and white, are the true show-stoppers. Pollinators are drawn to the bracts, also referred to as “fake flowers,” which conceal the real blooms beneath a background of vivid colors.
Where to plant:
Bougainvillea should not be planted in swampy or low regions where water could collect; rather, it should be placed on higher land or slopes. They need room to spread out and should be planted where they will receive at least 5 to 6 hours of direct sunlight each day in order to thrive at their best. Bract production and flowering will be reduced in the absence of sufficient sunlight. In really hot conditions, some midday shade can be helpful.
How to plant:
Be careful while planting bougainvillea plants to avoid damaging the roots because they have sensitive, fibrous root systems. As you would with other plants, avoid teasing or loosening the roots. Make sure to create a planting hole that is roomy enough for the roots to grow freely.
Pruning:
Your bougainvillea will stay in form and produce more flowers if you prune it back after it blooms. Bougainvillea vines display their color on new growth, thus periodic pinching will promote both more color and fuller growth. Spring is the best time to prune dead branches from your bougainvillea. When pruning bougainvillea, gloves and long sleeves are a must because the majority of cultivars contain multiple thorns. Additionally, the foliage causes skin irritation in certain gardeners.
Amendments & Fertilizer:
A slow-release fertilizer is a wonderful option because bougainvillea are heavy feeders and like tiny amounts of nutrients that are available regularly. Throughout their blossoming season, they should be fed often.
Watering:
Give your bougainvillea a good bath in water, and then leave it to dry. They could lose their bracts and leaves if their feet are left moist. A shallow and weak root system can be the result of frequent, insufficient watering. Your climate should be taken into account when determining how much and how often to water. R&G Bougainvillea offers the following practical watering advice: Little leaves, but a few feeble bracts lack of water. a lot of green leaves, but not much color or not enough color. Just the appropriate amount of robust leaves and bracts.
Diseases and Pests:
Although they are typically resistant to disease, aphids, leafminers, scale, snails and slugs, spider mites, and whiteflies all cause problems for bougainvillea plants. The easiest way to maintain the health of your bougainvillea is to keep the foliage dry and allow adequate airflow around the plant. Remove any dead, diseased, or damaged branches and leaves right away.
Training:
Bougainvillea may require assistance climbing and won’t spontaneously attach itself. To secure and train bougainvillea to its supporting framework, use gentle straps. Some varieties have thorns with hook-like protrusions that help anchor the plant to fencing made of chain link or other materials.
Can bougainvillea bloom inside of a pot?
Bougainvillea thrives in a relatively compact container with slightly constrained roots. Move the plant to a container that is just one size larger when it is big enough for repotting.
Use a standard potting soil with a low peat content; peat moss that contains too much moisture retention can cause root rot.
Bougainvillea must be grown in containers with at least one drainage hole. When planting, erect a trellis or other support; doing so later risked damaging the roots.
My bougainvillea needs a place outside.
- Sunlight is essential for bougainvillea. You won’t get the riot of blossoms that is the whole idea of planting bougainvillea if you place one in a shaded area. You’ll encounter thorns and vines. Each day, it requires at least six hours of sunlight.
- The soil must have good drainage. They dislike prolonged wetness and are susceptible to root rot in dense soil. They enjoy loose, rocky soil.
- Take care when handling the root ball. Due to their weak roots, bougainvilleas are often destroyed when being transplanted.
- After planting, water the plant once, then every week until it becomes established. Except in severe droughts, stop watering it once it has established itself (which often takes one to two years). It should be dry for bougainvillea.
I have a bougainvillea; when may I plant it outside?
These can be put in the garden in the summer, but in the winter they need to be protected from frost. Add balanced granular fertilizer or a controlled-release fertilizer, such as Osmocote, to border soil to enrich it.
Is bougainvillea winter-hardy?
Zones 9 through 11 of the United States Department of Agriculture are suitable for bougainvillea. A minor freeze won’t harm it, but a severe one will damage the roots. A bougainvillea should be kept in containers and brought indoors during the winter in places that are below those zones. For the plant to hibernate throughout the cold season, particular bougainvillea winter care and preparation are required.
Even mild places like Texas are susceptible to fairly prolonged freezes, which can occasionally result in snow and ice. Zone 9 experiences extremely low temperatures of 18 to 28 degrees Fahrenheit (-8 to -2 degrees Celsius). If the plant is growing in the ground, you have the option of digging it up at the end of the growing season or just keeping it in a container.
It might be advisable to containerize because digging up the plant will stress the bougainvillea. You won’t run the risk of upsetting the roots if you do it that way. Lower zone plants really must be brought inside. Unless they are in a protected area or a warmer microclimate of the landscape, even people in zone 9 should spend the most of the winter indoors. There are several guidelines for successfully overwintering bougainvillea once it has been brought indoors.
We tend to associate the bright and beautiful perennial Bougainvillea plant with exotic tropical climes, but with due care and consideration they can be grown successfully in the UK.
If you cultivate vivid bougainvillea blooming bracts in pots and keep them indoors throughout the winter, you may enjoy them even in the wettest and coldest regions of the country with a little work and awareness of their requirements.
Where to plant Bougainvillea in the UK
The first thing to be aware of is that bougainvillea prefers temperatures of at least 10 degrees at night and up to 38 degrees during the afternoon in order to grow. Frost should never be used!
In order to get around this in our freezing region, you can plant them in containers and grow them in a conservatory or greenhouse. Then, during the height of summer, you can place them outside in a south-facing spot. If you reside in Cornwall’s extreme south-west, bougainvillea can grow year-round in a protected, sunny outdoor location.
Remembering that bougainvillea are enormous, active climbers who require a lot of room and a trellis for support is crucial. Some cultivars, including the well-known Barbara Karst, can be pruned into standards.
Because bougainvillea don’t like having their roots clogged with moisture, they require a large container with plenty of drainage holes and a well-drained, somewhat acidic soil.
Be aware that bougainvillea contain prickly branches, so avoid placing the plant near a doorway or gateway where it can be dangerous.
Caring for Bougainvillea in the UK
Early in the spring, following its winter slumber, bougainvillea plants awaken and begin to develop rapidly and profusely. Every two weeks or so, as leaf buds begin to form, the plant needs a good soaking (preferably with rainwater); in between waterings, it should be allowed to dry out.
Beginning in the middle of April, fertilize your bougainvillea once a week with a fertilizer heavy in nitrogen. Include potash in the feed as the bracts begin to display their colors.
Your bougainvillea will reward you with a stunning display of vibrantly colored bracts if you take good care of it. Let the plant dry up until the leaves begin to droop, then start watering again less regularly if blossoming is not abundant throughout the summer months.
Once a month will get them through the winter, when they’re likely to drop their leaves as the temperatures drop. Reduce feeding and watering as flowering slows in the autumn.
To keep bougainvillea in form and at a manageable size, prune them in the late winter. Also, make sure they are securely fastened to a trellis or other support.
Can bougainvillea withstand extreme cold?
I’ll start by responding to some queries before outlining the timeline of events surrounding these freezes. You’ll learn about my actions and how they affected the bloom. It’s a positive sign that Barbara Karst is a strong grower and big bloomer. My other three bougainvilleas don’t bloom as profusely.
Can Bougainvillea Survive a Freeze?
It can, really. How many nights in a row and whether the ground freezes are the deciding factors in whether bougainvillea will survive. With mine, the roots were spared damage because the earth didn’t freeze, but the majority of the outer branches and foliage were damaged. The only harm was cosmetic.
What is the Lowest Temperature Bougainvillea can Tolerate?
Above 32F is the ideal temperature for bougainvillea. Anything lower will result in minor or significant damage. Tucson (USDA zones 9a/9b) is a little bit colder in the winter than Phoenix (USDA zones 10a/10b), where bougainvillea grows larger and has a higher chance of avoiding being struck.
I’m studying this subject in great detail with you. I spent ten years of my life in Santa Barbara, where wintertime lows are rarely below 40F. My two bougainvilleas only required shaping and training throughout the winter months. Even though bougainvilleas have a poor winter climate in Tucson, you may nevertheless see them planted all around the city.
How Does Bougainvillea Come Back After a Freeze?
It depends on how severely you pruned it and how badly it was affected. My Barbara Karst that was growing in the driveway area received far more damage than mine, which was growing against the house opposite the pink grapefruit tree. They grow more slowly and flower less frequently as a result of the grapefruit tree’s shading.
Early November, and my Barbara Karst still has the same appearance as it did the year before. This was not the case throughout the spring and summer. I keep it clipped so that it remains a full shrub rather than a climbing plant, and I don’t allow it grow too tall. I didn’t prune it till the middle of April. The fact that other things (life!) kept getting in the way prevented me from doing it sooner than I should have.
If yours is tall and you severely prune it, you will probably see a lot of foliage growth.
How Do I Prune Bougainvillea After a Freeze?
Wait until nighttime temperatures are above 40°F. In those two postings, which are linked back to back above, you can read and see how I pruned mine.
I don’t want my Barbara Karst to get too tall or wide, so I keep it clipped like a shrub. The amount of damage it has sustained and the shape you want it to assume will determine how you prune yours. To get it to grow back into the shape or form you want it to have, you might need to prune it three or four times.
End of October photo of the same plant. It had filled in and was putting on quite a colorful display, as you can see.
Can You Prune Bougainvillea in Winter?
In late January and early February, I performed the greatest pruning on my bougies in Santa Barbara (USDA zones 10a and 10b). The form they would take for the remainder of the year was determined by this one.
I wait till March or April here in Tucson (zone 9a/9b) because the winter evening temperatures are colder. The same and occasionally warmer daytime temperatures prevail here, but the damaging nightly temperatures.
It might be best to leave the bougainvillea alone since they go into a semi-dormant state during the colder winters here.
My Bougainvillea Looks Dead. What Should I Do?
For a few months, my bougainvillea appeared to be dead. Most of it wasn’t dead, though some of it was. The top and outer branches had been damaged, but I left them alone until the temperature rose in the evening. I didn’t prune those branches till fresh growth had begun to appear on them.
So, waiting is the wisest course of action. My bougainvillea was covered in dead leaves in January, so it was tempting to prune it. But near the end of the month, there was another freeze, and at the end of February, there was a little snowfall. My bougainvilleas are currently gorgeous, so I’m really glad I resisted the impulse!
At the end of March, it appeared as shown. There are many dead branches, with most of the growth occurring at the corner of the home and garage (& a little at the bottom).
How Do I Protect my Bougainvillea From a Frost?
You can cover it if it’s a low-growing kind, like my brand-new Bougainvillea Blueberry Ice. Because they tend to remain smaller when grown in pots, bougainvilleas are also simpler to protect. My more cold-sensitive plants are covered with old sheets that I remove throughout the day, but this frost protection fabric is another option and is available in a few sizes.
It is considerably more difficult to preserve them in this manner when taller types are growing in the ground. Three factors will ensure their survival: Avoid pruning too late or too severely in the fall; instead, cover the roots with a thick layer of mulch (2-4) and wait until the evenings are warm before pruning in the winter or spring.