Cup Flower 'Purple Robe'

Nierembergiahippomanica var. caerulea

Family
Solanaceae (so-lan-AY-see-ee)
Genus
Nierembergia (nee-rem-BERG-ee-uh)
Synonym
Nierembergia caerulea
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Smooth
Height
6-12 in. (15-30 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
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)
Bloom Color
Lavender
Medium Purple
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Blooms all year
Other Details
Category
Annuals
Tropicals and Tender Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Propagation Methods
From herbaceous stem cuttings
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; direct sow after last frost
Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

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

Hereford, Arizona

Sonoita, Arizona

Barstow, California

El Sobrante, California

Encinitas, California

Montgomery Creek, California

Quartz Hill, California

Baldwin City, Kansas

Louisville, Kentucky

Milton, Kentucky

Johns Island, South Carolina

Bacliff, Texas

Dripping Springs, Texas

Granbury, Texas

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Gardener's Notes:

4
positives
3
neutrals
0
negative
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A
Willcox, AZ | April 2018 | positive

I found a very small plant with 1 purple bloom in my yard when mowing and dug it up. Too pretty to discard so I relocated it to my flow...Read More

P
Shawnee, OK | September 2014 | positive

I agree that 7B might be too low a rating for this plant. I grew it for several years in a full sun border in the CA mountains with a ve...Read More

M
Dripping Springs, TX | July 2014 | neutral

Great plant for the heat. I grow it outside in z8b and I have a friend who grows it in 7a so I think the Z rating is too conservative abo...Read More

R
Albuquerque, NM | August 2012 | neutral

These are fickle in Albuquerque New Mexico 6b-7a. Is my lack of blooms lack of water or toon much shade?

S
North Fork, CA (Zone 7b) | October 2010 | neutral

I cannot say enough nice things about Nierembergia! Beautiful rich color, perennial in Zone 7, fern like foiliage, creeps over walls and ...Read More

N
El Sobrante, CA (Zone 9b) | November 2003 | positive

Cupflowers are a fabulous choice for a mixed box or bed - they do not stamp out other plants, but come back year after year as strong blo...Read More

L
L
| May 2002 | positive

Grows well even in West Texas. Zones 6, 7, 8, 9. Hardy, stands up well to high, hot winds and climates with little rainfall ( 12-18 inc...Read More

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