Category: Tropicals and Tender Perennials Vines and Climbers
Height: 15-20 ft. (4.7-6 m)
Spacing: 15-18 in. (38-45 cm)
Hardiness: USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Sun to Partial Shade
Bloom Color: Light Blue Violet/Lavender White/Near White
Bloom Time: Mid Summer Late Summer/Early Fall
Foliage: Evergreen Blue-Green Smooth-Textured
Other details: Requires consistently moist soil; do not let dry out between waterings
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: By dividing the rootball From leaf cuttings From herbaceous stem cuttings
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds Properly cleaned, seed can be successfully stored
On Mar 22, 2013, TexasDollie from Windcrest, TX (Zone 8b) wrote:
Got a start of this at our MG class, trained it over the shady-ish arbor of the veggie garden gate. Trained is not the word, more like...stood back and watched it eat the arbor. Not much in the way of flowers the first couple of years, but last year it was covered in them. We're moving, but I have a start of it to take with me.
On Apr 24, 2012, Nanciii from Bossier City, LA wrote:
I have had the Blue Sky flower for years comes back every year and its gorgeous, it loves to take over my gate, some years have been better than others as far as blooming last yr with the heat vine was fine blooms pretty minimal. Mine blooms when the heat of the summer get here late june Ealy July. One of my absolute favorites.
On Jul 4, 2010, Aquarius247 from Lake Alfred, FL wrote:
I've grown this vine in my central Florida yard for 3 years. I never knew its name until now. This past winter it froze to the ground, but now it is growning up an old clothes line post and line. It flowers from late June to late winter. The only problem I've encountered was from aphids. I did grow a second vine from a cutting after rooting it in water. The flowers look like Morning Glory but last for days.
On Jul 26, 2009, fullsun007 from Gainesville, FL wrote:
I have had this fine growing in my yard for several years and it never ceases to disappoint. I have limited space in my yard, so planted my blue sky vine at the base of my Japanese Magnolia which flowers here in zone 8B in early spring but after which provides little color the rest of the season. So I let the tree provide the frame for the vine to grow up and by mid summer have those beautiful flowers appearing all over the tree. I have not had trouble with seeds and volunteers.
On Jul 13, 2009, khabbab from lahore Pakistan (Zone 10b) wrote:
In lahore pakistan, this vine blooms late in summer till start winter. Blue blooms are very pretty. It responds good to container culture. It is fast growing vine needs fertilizer in growing season. There is another yellow flower variety called black eyed Susan but it has smaller flowers than blue ones.
On May 5, 2009, SierraTigerLily from Boca Raton, FL (Zone 10b) wrote:
Constant bloomer, grown with roots in the shade and protected from noonday sun. I give it tropical fertilizer and it thanks me by shooting out new branches of blooms a week or two later. Although I hack it back every few months, this twining vine shows no potential for "escape" four years after planting. Its root area is exactly the same as when I first put it in the ground. I find it easy to keep the plant contained on one arch. All visitors to the garden stop and touch the flowers.
On Jan 29, 2009, WillowWasp from Jones Creek, TX (Zone 9a) wrote:
This plant is a joy to keep and so beautiful to look at. I wish I had more and I will try and do cuttings and see how well they do this spring. I am really impressed with her and I love all the beautiful flowers from early spring to almost winter.
On Sep 29, 2007, lsander153 from Pittsburgh, PA wrote:
I planted this in a pot from a small cutting last May. I put the pot next to an 8' trellis in a sunny part of my garden. It bloomed pretty well at the start, then grew profusely up the trellis, but with no blooms. There are now (September) two flowers at the top, and several buds. I plan to cut it back and bring the pot in over the winter. I'd like to know how to get more blooms.
On Apr 19, 2007, Lily_love from Central, AL (Zone 7b) wrote:
I would recommend these vines, beautiful, rare blue flowers when other colors fade toward the end of the seasons. Though, treating them as hebacious perennials, this does faithfully bloom every year. I would avoid having this vine tangle with other evergreen vines since we have to pull the spent vines off in winter.
March 20011 update; severe winter killed my vines last year. I'm working on replacing the vines.
On Nov 10, 2005, sunriselmi from Hughson, CA wrote:
i saw this in an arboretum in canada. then found in a local HARDWARE store! 3 years, comes back every year from frost to 15 feet, flowers late summer thru fall. pest free, vigorous, beautiful flowers. no doubt division is easiest and fastest propagation.
On Jul 12, 2005, dmaroni from Chapel Hill, NC wrote:
I grow this in a pot, outdoors in the summer, then cut it back and overwinter it in a greenhouse. It grows vigorously but produces only few of its gorgeous flowers only late in the season.
I am troubled by all of the discussions of its invasiveness in Australia and Hawaii **and** Florida
where it is considered a real nuisance. I'm reminded of kudzu which also has pretty flowers and, what's more, incredible grape-soda fragrance: this beast is marching across some parts of the NC landscape and it has almost devoured SC and GA. It would be horrible if like that were to happen with Thunbergia, so those of you who have it survive over winter should be especially careful that it doesn't get away from you!
On Nov 10, 2004, CaptMicha from Brookeville, MD (Zone 7a) wrote:
I didn't appreciate the beauty of this plant until I saw one in person. The large blue heavenly blooms are incredible! And they last for days which is always a bonus for me.
I find it very easy to flower because mine is flowering inside and is covered in buds. I don't give it any special care except for a sunny window, something to climb on and water about once a week. It's in a quart container at about 72 degrees.
The only problem I encountered with it is an aphid infestation which was easily taken care of. I can't wait to see how this plant will do outside once it warms up again.
This plant is lush and hardy. It has grown about two feet since I planted it only four months ago. The problem is that it is still not flowering. It was flowering when I bought it. I am using time release fertilizer, but still no luck. Any feedback?
On Mar 13, 2004, crisee44 from Morriston, FL wrote:
I bought this from a local plant distributor here in Levy Co Fl.
I planted two plants about 8 feet apart in front of my deck and they completely covered the railings (22' long) in the first season.
The flowers came in the first yr too, and were absolutely beautiful and so profuse.
It has warmed up here in Central Fl and last week I found the plant already growing 44" up my deck. There area several shooters on the ground and I cut, dipped them in rooting compound and transplanted them in several other areas. One week later, they are still doing great. Can't wait to see how the cutting do this yr.
On Nov 22, 2003, allencpa56 from Moss Point, MS (Zone 9a) wrote:
I would like to say this is the best plant site I have visited. I came here looking for a plant that came up in my yard and started running everwhere. Everyone wanted to know what it was. I had no idea until I came here. This is a very helpful site. the plant is a bengal clock vine, blue sky vine.It came up beside a honeysuckle vine i had planted to run around ny porch. Can not even see the honeysuckle.Thanks for a wonderful site.
On Jun 23, 2003, docturf from Conway, SC (Zone 8b) wrote:
This Thunbergia species does very well in the Coastal region of South Carolina and has survived temperatures as low as 15 F. No pests have been observed after more than 9 years of growth. If a mild winter takes place, the vine will continue to grow actively, although much less rapidly.
On Jun 22, 2003, amelia98 from Brookline, NH wrote:
Bought 2 or 3 years ago as a houseplant for those gorgeous flowers, it turned out to be infested with bugs and was tossed out the back door. I planted it next to the house not expecting it to survive the harsh winters of NH. The ants and lady bugs are taking very good care of it's bug problem and it's about to reach the top of the second story of my house. Prolific growth but not uncontrollable. Unfortunately, no sign of any flowers yet.
On Jan 21, 2003, Schmetterling from Louisville, KY (Zone 6a) wrote:
The tubular flowers of Thunbergia are a little deeper, about 3" long, and are borne in clusters.
The most commonly seen varieties are sky blue to light violet although there is a white flowered type as well. Leaves are leathery and have a distinctive, elongated heart shape. It is one of the most free flowering vines for shade in the South and is underused due to lack of distribution.
Growth slows or stops in cool temperatures, and the top is killed to the ground after a freeze. In frost-free climates, it is evergreen.
On Sep 4, 2002, tiG from Newnan, GA (Zone 8a) wrote:
Fast growing very pretty vine. The flower is one of the most beautiful I've seen. Haven't seen any bugs on this plant all summer, and have had no problems at all with it.
Will root from the petiole, takes a while, but is proven successful.
This plant has been said to grow in the following regions:
Vincent, Alabama Glendale, Arizona Alameda, California Encinitas, California Fallbrook, California Hughson, California Laguna West-lakeside, California San Clemente, California San Leandro, California Santa Barbara, California Stockton, California Walnut Creek, California Bartow, Florida Beacon Square, Florida Bellview, Florida Boca Del Mar, Florida Boca Raton, Florida Bokeelia, Florida Casselberry, Florida Clermont, Florida Coral Springs, Florida Cottondale, Florida De Bary, Florida Deltona, Florida Fort Lauderdale, Florida Fort Mc Coy, Florida Fort Pierce, Florida Fruitville, Florida Gainesville, Florida Gulf Breeze, Florida Heathrow, Florida Interlachen, Florida Jacksonville, Florida (2 reports) Key Largo, Florida Lake Belvedere Estates, Florida Lakeland, Florida Lakeside, Florida Lauderdale-by-the-sea, Florida Merritt Island, Florida (2 reports) Miami, Florida Morriston, Florida Mulberry, Florida Niceville, Florida Ocala, Florida Ocoee, Florida Palm Beach Shores, Florida Pembroke Pines, Florida Plant City, Florida Port Charlotte, Florida Rotonda, Florida Vero Beach, Florida Wellborn, Florida Yulee, Florida Bibb City, Georgia Guyton, Georgia Hawaiian Acres, Hawaii Bossier City, Louisiana Chackbay, Louisiana French Settlement, Louisiana Gonzales, Louisiana Lafayette, Louisiana (2 reports) Lake Charles, Louisiana Mandeville, Louisiana Old Jefferson, Louisiana Carriere, Mississippi Florence, Mississippi Gautier, Mississippi Natchez, Mississippi Saucier, Mississippi Brookline, New Hampshire Averill Park, New York Conway, South Carolina South Sumter, South Carolina Austin, Texas (3 reports) Brazoria, Texas Briarcliff, Texas College Station, Texas Cumings, Texas Dickinson, Texas Freeport, Texas Galveston, Texas Houston, Texas Humble, Texas Jacksonville, Texas New Waverly, Texas Plano, Texas Rose City, Texas San Antonio, Texas Santa Fe, Texas Scenic Oaks, Texas Stagecoach, Texas Tyler, Texas Windcrest, Texas Spangle, Washington