Madder

Rubiatinctorum

Genus
Rubia (ROO-bee-uh)
Synonym
Rubia tinctoria
Sun Exposure
Partial to Full Shade
Foliage
Herbaceous
Height
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
Spacing
8-10 ft. (2.4-3 m)
Hardiness
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)
Bloom Color
White/Near White
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
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)
Patent Information
Non-patented
Propagation Methods
From herbaceous stem cuttings
Seed Collecting
Allow unblemished fruit to ripen; clean and dry seeds
Regional

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

Manassas, Virginia

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Gardener's Notes:

1
positive
1
neutral
0
negative
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J
Manassas, VA | October 2007 | positive

It's not that pretty, but it is hardy and tough.
I bought it as a historical curiosity (the roots are an ancient source of red d...Read More

D
west Houston, TX (Zone 9a) | May 2006 | neutral

Also called dyer's madder, it yeilds a beautiful red dye from its colorful roots. This hardy, sprawling perennial is easily grown from cu...Read More

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