Digitalis Species, Big-Flowered Foxglove, Large Yellow Foxglove

Digitalisgrandiflora

Genus
Digitalis (dig-ee-TAH-liss)
Species
grandiflora (gran-dih-FLOR-uh)
Synonym
Digitalis ambigua
Digitalis flava
Digitalis lutea
Digitalis magniflora
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Smooth
Height
24-36 in. (60-90 cm)
Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
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)
Danger
All parts of plant are poisonous if ingested
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
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
This plant is attractive to bees, butterflies and/or birds
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
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

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

Auburn, Alabama

Opelika, Alabama

Waverly, Alabama

Palmer, Alaska

Flagstaff, Arizona

Denver, Colorado

Parker, Colorado

Post Falls, Idaho

Westchester, Illinois

Durant, Iowa

Sioux City, Iowa

Ewing, Kentucky

Skowhegan, Maine

Nahant, Massachusetts

Fountain, Michigan

Lake Orion, Michigan

Eupora, Mississippi

Himrod, New York

Rochester, New York

Cleveland, Ohio

Columbus, Ohio

Williamsburg, Ohio

MOUNT HOOD PARKDALE, Oregon

Monmouth, Oregon

West Chester, Pennsylvania

Salt Lake City, Utah

Amelia Court House, Virginia

Leesburg, Virginia

Norfolk, Virginia

East Port Orchard, Washington

Kalama, Washington

Parkwood, Washington

Port Orchard, Washington

Rhinelander, Wisconsin

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Gardener's Notes:

5
positives
3
neutrals
0
negative
Sort By:
Sort By:
N
Vineland, NJ | April 2012 | positive

This is the only foxglove that I have found that reliably comes back after flowering. A true perennial. Not as tall or as large of flow...Read More

H
Auburn, AL (Zone 8a) | February 2011 | positive

This plant does well in a mostly shade garden. It flowers every year and is just a gem of a digitalis. Would recommend it to anyone in this area.

A
A
Nahant, MA (Zone 7a) | June 2010 | positive

The Yellow Foxglove I imported from my mother's gardens in Maine seem to be quite happy here in Nahant, MA. It took a few years for them...Read More

K
(Zone 8a) | July 2007 | positive

Very tough, almost to the point of being invasive, but I really like this plant. A soft color which is lovely in a wilder garden.

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

Although this foxglove isn't as showy as Digitalis purpurea, the soft yellow flowers with their brown netting are nice when you want some...Read More

S
| July 2004 | neutral

My Grandsiflora took well to my clay-like soil in the garden. The blooms only lasted a few weeks though, i still have a few left. The foi...Read More

B
B
Baa
| August 2002 | neutral

A short lived perennial Foxglove from Europe to Siberia.

Has lance - oblong, toothed, veined, mid-deep green, often hairle...Read More

B
Thousand Oaks, CA | June 2001 | neutral

By the way, this IS a highly toxic plant for those that might be tempted to eat your garden plants. Foxglove contains a cardiotoxin (dig...Read More

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