Hardiness: USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) 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) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Full Sun
Danger: All parts of plant are poisonous if ingested
Bloom Color: Bright Yellow
Bloom Time: Late Summer/Early Fall Mid Fall
Other details: Average Water Needs; Water regularly; do not overwater
On Sep 28, 2006, Kathleen from Panama, NY (Zone 5a) wrote:
I received this plant as part of a trade five or six years ago, knowing that I was a zone colder than it normally grows. It has put up foliage every year, but never bloomed. I had decided to send it to my daughter who lives in zone 7a, a more appropriate zone, but low and behold, two little buds have become two lovely clear yellow blooms. I can truthfully say it was worth the wait.
On Sep 18, 2004, philomel from Castelnau RB Pyrenées France (Zone 8a) wrote:
They are naturalised on a sunny bank that just gets a little dappled shade here in SW France and are doing very well. The flowers appear sturdier than a crocus and are a wonderfully rich yellow. They open wide in sunshine and close as the sun goes in.
On May 6, 2002, lupinelover from Grove City, OH (Zone 6a) wrote:
This plant was a squirrel gift in my garden a few years ago; the single bulb multiplied to a large stand within 3 years.
The flowers appear in early September, and stay until mid-October. Foliage appears and grows along with the flowers, ultimately growing to about 10" high. It remains upright and growing until March, when it starts to go dormant.
Reputedly difficult to get established; resents transplanting. I haven't tried yet.
Some disreputable companies sell wild-collected and mis-labeled sternbergias, which are becoming threatened in their native habitat.
Flowers appear at the same time as fall-blooming crocus, which they resemble, but the cups are much larger, and a brilliant yellow.
This plant has been said to grow in the following regions:
Little Rock, Arkansas Garberville, California Los Altos, California San Jose, California Clifton, Colorado Parkway Village, Kentucky Green Valley, Maryland Panama, New York Catasauqua, Pennsylvania West Grove, Pennsylvania Houston, Texas Manchaca, Texas