Category: Bulbs Ponds and Aquatics Tropicals and Tender Perennials
Height: 8-10 ft. (2.4-3 m)
Spacing: 8-10 ft. (2.4-3 m)
Hardiness: USDA Zone 7b: to -14.9 °C (5 °F) 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)
Sun Exposure: Sun to Partial Shade Light Shade
Danger: All parts of plant are poisonous if ingested
Bloom Color: White/Near White
Bloom Time: Late Summer/Early Fall
Foliage: Grown for foliage Deciduous Herbaceous Silver/Gray
Other details: Requires consistently moist soil; do not let dry out between waterings Very high moisture needs; suitable for bogs and water gardens
Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Patent Information: Non-patented
Propagation Methods: By dividing rhizomes, tubers, corms or bulbs (including offsets)
On Jul 3, 2012, henryr10 from Cincinnati, OH (Zone 6b) wrote:
We have grown Colocasia gigantea for a while.
This Colocasia gigantea 'Thailand Giant Strain' blows it out of the water.
A month or so ago we bought a 3' tall plant in a gallon pot.
Re-potted to a 36" pot manured and composted heavily.
We are now looking at 32" (shoulder to tip) leaves and a spathe and it's only the first of July!
We still have at least 3 months of growing to go here in Cincinnati.
On Apr 5, 2010, stella from Raleigh, NC (Zone 7a) wrote:
In North Carolina, we can keep this zone 8b plant alive over the winter by covering it with 1' of leaves and stuff during the winter. It does not start growing again until July, but by September it is huge!
On May 12, 2009, WendyKellyBudd from Chico, CA wrote:
I bought the tiniest start from an ebay seller last year. Potted it into a 24" pot, placed it under an oak tree where it gets direct morning sun and in the afternoon has bright light, but no direct sun. Summers are hot, and dry here. Also, keep it out of winds so the leaves don't shread.
This puppy grew so large!!! I have a photo of my hubby hiding under a leaf. Everyone comments on this plant.
AND, it overwintered outside in zone 8b. We live in a two story home, so I put the pot on the ground floor, against the house, protected under the second story's deck, facing South. February gets down to 22°F here, I thought for sure it died. It was a blackened stub and there were no signs of life...but it came back in early May!! I bought another this year as no daughters came out last year. I will always have this plant in my collection.
On Nov 23, 2008, keonikale from Lexington, SC (Zone 8a) wrote:
This is one of our favorite colocasia. It grows extremely fast and the leaves get quite large within just a few months. Spath's will bloom in rows of four and produce large seed pods (if pollinated) beneath each spath. Once they burst you can harvest the seeds, which will be in dozens (if not hundreds) of small "pouches." Each pouch holds dozens of tiny tomato sized seeds that can be planted and will sprout within 2-3 weeks. By three months they'll often have 3-4 leaves and be well on their way to becoming adults in another growing season or two.
This huge strain of the giant elephant ear was grown from wild collected seed (PES 1003B) from Kanchanaburi Province, Thailand, in 2003 by former PDN research manager Petra Schmidt. In the wild, the plants reached a massive 9' tall, which is much larger than the clone of C. gigantea that we currently grow. For us, each individual leaf grows in excess of 5' long x 4' wide. Each seedling will differ slightly, but massive plants will be the result. In foliage, the leaves are an attractive glaucous-grey which is typical of this species. From an early age, the plants are adorned with clusters of dramatically large, pleasantly scented, white flowers.
This plant has been said to grow in the following regions:
Chico, California Garden Grove, California Long Beach, California Fort Myers, Florida Lakeland, Florida Port Charlotte, Florida Sarasota, Florida Chicago, Illinois Oakbrook Terrace, Illinois Fairfield, Iowa St John, Mississippi Toms River, New Jersey Elizabeth City, North Carolina Huntersville, North Carolina Raleigh, North Carolina (2 reports) Southern Pines, North Carolina Fruit Hill, Ohio Perrysburg, Ohio East Sumter, South Carolina Lexington, South Carolina Lake City, Tennessee Louisville, Tennessee Galveston, Texas Pecan Grove, Texas Richland Hills, Texas