Hyacinthus, Dutch Hyacinth 'Delft Blue'

Hyacinthusorientalis

Genus
Hyacinthus (hy-uh-SIN-thus)
Species
orientalis (or-ee-en-TAY-liss)
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
Smooth
Height
6-12 in. (15-30 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
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
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Dark Blue
Bloom Time
Mid Spring
Other Details
Category
Bulbs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Suitable for growing in containers
Bloom Characteristics
Flowers are fragrant
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 rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

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

GARBERVILLE, California

Los Altos, California

Loveland, Colorado

Hastings, Minnesota

Florence, Mississippi

Piedmont, Missouri

Las Cruces, New Mexico

Coshocton, Ohio

, Ontario

Grants Pass, Oregon

Aberdeen, South Dakota

Salt Lake City, Utah

Leesburg, Virginia

Buffalo, West Virginia

Liberty, West Virginia

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Gardener's Notes:

4
positives
1
neutral
0
negative
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E
Las Cruces, NM (Zone 8a) | February 2014 | positive

These have now come up the 2nd year for me and many multiplied. Blue/Purple mix of color is very pretty.

S
| March 2010 | neutral

Hybridized by J.W.A. Lefeber, 1944

W
Eastern Long Island, NY (Zone 7a) | April 2007 | positive

I inherited two of these from the previous owners of my house, They suffered neglect & bad placement but survived. I transplanted them i...Read More

W
Buffalo, WV (Zone 7a) | April 2007 | positive

Fabulous color and scent! These were the second Hyacinth cultivar to bloom for me after H. Snow Crystal. They started blooming the seco...Read More

O
Joseph, OR (Zone 5a) | April 2005 | positive

VERY fragrant! I didn't have full blooms, but that can be based on a number of factors. Just a great blue color that intoxicates the senses!

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