Delphinium, Belladonna Delphinium, Larkspur 'Bellamosum'

Delphinium x belladonna

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Delphinium (del-FIN-ee-um) (Info)
Species: x belladonna (bel-la-DON-na) (Info)
Cultivar: Bellamosum



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


36-48 in. (90-120 cm)


24-36 in. (60-90 cm)


USDA Zone 4b: to -31.6 C (-25 F)

Sun Exposure:

Sun to Partial Shade


All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Light Blue

Dark Blue

Bloom Time:

Late Spring/Early Summer

Late Summer/Early Fall


Unknown - Tell us

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds


This plant has been said to grow in the following regions:

Redondo Beach, California

Richmond, California

Santa Barbara, California

Glastonbury, Connecticut

Bethel, Maine

New Haven, Vermont

Vancouver, Washington

Watertown, Wisconsin

West Bend, Wisconsin

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Gardeners' Notes:


On Feb 18, 2012, whitesam9 from Dayton, OH (Zone 5b) wrote:

This is one of my favorite delphiniums. They have a long blooming period for a delphinium. Mine bloomed for two solid months through June and July last year, and then a smaller rebloom later. I staked mine and they grew to about 4 feet tall and developed several branches. I deadheaded each branch before it could go to seed, and that kept the flowers coming. I've tried Bellamosums in both full sun and light shade - they do much better in full sun. Hummingbirds seem to like these delphiniums. It's a very pretty sight to see a ruby-throated hummingbird on the blue flowers.


On Aug 25, 2008, KaylyRed from Watertown, WI (Zone 5a) wrote:

Delphinium x belladonna 'Bellamosum' has been a super performer in my garden. It's not fussy at all, grows like crazy, and has returned faithfully in its second year here with me. (It is a bit late to wake up in the spring, so be patient.) The brilliant true blue blooms are definitely show-stoppers. Be warned that this delph usually needs staking. Stake it when the plant is about 12" high or it will start to splay out and become unsightly by the time it blooms. (I learned this the hard way my first year.)

My plants have thrived on a springtime side-dressing with aged manure. They seem to have average water requirements. (The delph also makes a good "signal plant." If it's starting to look dry and its leaves are beginning to wilt or curl, I know my garden needs a good soaking... read more