Bupleurum, Hare's Ear, Roundleaf Thorow Wax, Thoroughwax 'Green Gold'

Bupleurumrotundifolium

Family
Apiaceae (ay-pee-AY-see-ee)
Genus
Bupleurum (boo-PLUR-rum)
Species
rotundifolium (ro-tun-dih-FOH-lee-um)
Synonym
Sun Exposure
Full Sun
Height
24-36 in. (60-90 cm)
Spacing
9-12 in. (22-30 cm)
Hardiness
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)
Danger
N/A
Bloom Color
Green
Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall
Other Details
Category
Annuals
Tropicals and Tender Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
Patent Information
Propagation Methods
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Knik-Fairview, Alaska

Lakes, Alaska

Meadow Lakes, Alaska

Tanaina, Alaska

Wasilla, Alaska

Barbourville, Kentucky

Columbus, Ohio

Sherwood, Oregon

Wilkes Barre, Pennsylvania

Austin, Texas

Vernal, Utah

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Featured Videos

Gardener's Notes:

3
positives
0
neutral
0
negative
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S
(Zone 6a) | January 2010 | positive

I love this plant! Its easy to grow from a spring sowing and the round blue-ish green leaves with the pretty yellow-green flowers are very unique!

J
Palmer, AK (Zone 3b) | March 2008 | positive

This is an easy self sowing annual that is wonderful for cut flower arrangements. It is rare here, and I'm not sure why. The biggest chal...Read More

L
Ogden, UT (Zone 5b) | January 2005 | positive

This intriguing, self-sowing annual blooms in a chartreuse green color that brings out the colors of other flowers, especially bright one...Read More

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