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  • Barbara Karst Bougainvillea for Sale

*images shown are of mature plants

Barbara Karst Bougainvillea

Bougainvillea ‘Barbara Karst’

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Growing Zones: 4-1 patio / 9-11 outdoors
(hardy down to 30℉)

Growing Zones 9-11 outdoors
4-1 patio
9-11 outdoors

You are in Growing Zone: 6

Mature Height:

Vine: 15-30 ft. Tree: 4-6 ft.

Mature Width:

8-10 ft.




5-10 ft.

Growth Rate:


Drought Tolerance:


Botanical Name:

Bougainvillea ‘Barbara Karst’

Does Not Ship To:


Brilliant Red Flowers Reminiscent of the Tropics

Add Brilliant RED to Your Landscape

A profusion of non-stop summer splendor, the Barbara Karst Bougainvillea knows no blooming boundaries! This showy bougainvillea is flush with scarlet red blooms.

The source of this bounty isn’t flowers or leaves, but the bracts. They run the full length of each arching stem, luring admiring pollinators to tiny, white blossoms nestled among this brilliant bouquet.

A tropical plant, the Barbara Karst serves as an evergreen in frost-free zones, promising a mass of color from late spring well into fall. This durable perennial can handle colder climates, returning year-after-year with an abundance of warm-weather proliferation.

Unlimited Garden Uses

The Barbara Karst Bougainvillea is available as a vine or already trimmed and trained in tree-form.

Add Amazing Color with this Quick Growing Vine
Its vigorous nature can be “persuaded” into most any form your garden plans involve. Reaching up to 30 feet, it fills in quickly as ground cover, a privacy screen or cascading hedge. With a little guidance and support, the spiny thorns climb just about any structure, creating a bright red embellishment on an arbor, trellis or fence line – even the side of your house!  Invest a little more time pruning, and this bougainvillea can be tamed into a shrub, container plant or grown in a hanging basket.

You’ll Want This Impressive Tree
If you’re looking for a flowering tree, the Barbara Karst is easily maintained as a bonsai or topiary. When ordering in tree-form, all the work of training the vine into a single trunk is complete. Just keep your shears handy to shape the top and snip off errant shoots during the growing season. Most find a height of 4 to 6 feet manageable… but it will get taller if you want to let it go.

Hardiest of ALL The Bougainvilleas

Aside from your need to keep it “in check,” the Barbara Karst is a no-fuss, low-maintenance bougainvillea. Whether planted in the ground or a garden pot, full sun and an occasional soaking is all it requires… once the roots are established.

It’s a top-performer in hot, desert-like conditions, while tolerating temperatures as low as 20 to 25 degrees F. You might see new growth nipped by winter frost, but it easily rebounds once spring arrives.

Mass of Blooming Beauty

The Barbara Karst routinely outshines its familiar cousin, the San Diego Red Bougainvillea, in abundance and beauty. To achieve this brilliance in your own backyard, always plant your bougainvillea where it can get lots of sun – at least 6 hours each day. Remember, additional watering boosts leaf production, but drier conditions are what make the bracts really stand out!

Prized for its over-the-top display of brilliant color and natural propensity to flourish the moment it’s planted, the Barbara Karst Bougainvillea will make a huge splash in your garden landscape. Get your order in today! This popular variety is expected to go fast! 

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Planting & Care

It's Easy to Plant & Care for Your Barbara Karst Bougainvillea

Barbara Karst Bougainvillea Planting Diretions

Location: The Barbara Karst bougainvillea is a hybrid that is hardy in USDA plant hardiness zones 9-11. A vigorous vine, its stems reach lengths of up to 30 feet long. During the spring and summer months, the thorny vine produces an abundance of paperlike blossoms in brilliant hues of red. The vine grows well when planted in the ground or in a container. It is frequently used as a barrier, privacy screen, specimen plant, or trellised. Unlike many other flowering vines, the Barbara Karst bougainvillea is tolerant of coastal conditions.


Planting Instructions: Choose a planting location that provides full sun for best flowering. It must have at least five hours of sun per day or it will fail to produce blossoms. Plant in an area with well-draining soil and a pH of  5.5 to 6.5 for optimum growth. River sand or loam can be added to the planting hole at the time of planting to help facilitate drainage if the soil in the region drains slowly.


Dig a hole that is at least twice the diameter of the plant’s root ball and just as deep. Place the bougainvillea into the hole and backfill the soil into the hole. Tamp the soil down to remove air pockets. Water the bougainvillea thoroughly to also help settle the soil.


Container Growth Instructions: The bougainvillea has exceptionally fine, hairlike roots that are very susceptible to water damage. Choose a soilless mixture to pot the bougainvillea in for best results. Premixed, soilless growing media drains well and will discourage root rot. Avoid soil mixtures with higher levels of peat since they will retain too much moisture in the soil.


Choose a pot that is at least twice the diameter of the bougainvillea’s root system.  Fill the pot with 2 or 3 inches of growing media. Gently place the bougainvillea’s root ball on to the media and fill the pot with media around the plant's roots. Leave at least 1 inch between the top line of the soil and the top rim of the pot to facilitate easy watering. The bougainvillea does not require frequent repotting because it grows best when its root system is tightly bound within the pot.


When growing the bougainvillea indoors, place the plant in a south facing window where it will receive adequate sunlight. The optimum indoor temperature is 70 to 75 degrees Fahrenheit during the day and no lower than 55 degrees Fahrenheit at night. During the winter months, a consistent temperature of around 60 degrees Fahrenheit is ideal. When grown indoors, the bougainvillea likes a humidity level of 50 percent or higher. High relative humidity must be maintained around the plants at all times.


Irrigation: Allow the bougainvillea to dry out between waterings. Too much water will encourage the plant to produce excessive foliage growth and no flowers.


Fertilizing: Fertilize the bougainvillea during the blooming season. Liquid fertilizers are ideal for the bougainvillea. Apply a water soluble 15-15-15 fertilizer every two weeks at ½ tsp of fertilizer per gallon of water to the plant. You can also use a fertilizer designed for azaleas on a bougainvillea with a 6-8-10 formula. In the winter, reduce the frequency of fertilizing to once a month.


Pruning: The Barbara Karst bougainvillea does not require regular pruning to thrive. However, it can be pruned hard to maintain size or shape and if growth is excessive. Prune the vine mid-winter to set the shape for the upcoming season preferably when the evenings are starting to warm up a bit.. Avoid pruning when there is any danger of frost right afterwards.

Planting & Care

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Shipping Details

Most items ship the next business day unless otherwise noted

Estimated Shipping Time: Most orders ship immediately, however some orders may ship in 1-2 business days (we do not ship on the weekends) from date of purchase. As noted on the website, some items are seasonal, and may only ship in spring or fall. Once your order is shipped, you'll receive an email from with a tracking number.

Shipping Alert:

Due to cold weather, we have suspended shipping to the areas that are shaded on the map below. Please view the diagram to determine if your area has been affected. This includes anyone in Growing Zones 3, 4, 5 or 6. If you are unsure of your growing zone, visit our Growing Zone Finder.

We will resume normal shipping in the Spring. Please see the table below for your approximate ship date.

Zone Map


Shipping Resumes

Zones 3 & 4

Week of Apr 30th

Zones 5

Week of Apr 16th

Zones 6

Week of Mar 26th

Zones 7-11

Ships Now!

Shipping Cost

Amount of Order


Less than $15











32% of order