Campanula, Hybrid Bellflower 'Sarastro'


Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Campanula (kam-PAN-yoo-luh) (Info)
Cultivar: Sarastro
Additional cultivar information:(aka Sarasota)
View this plant in a garden



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round

Suitable for growing in containers


18-24 in. (45-60 cm)


24-36 in. (60-90 cm)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun

Sun to Partial Shade



Bloom Color:



Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall



Other details:

Unknown - Tell us

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:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


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


Blackhawk-camino Tassajara, California

Seymour, Connecticut

Winnetka, Illinois

Otho, Iowa

Roslindale, Massachusetts

Hopkins, Minnesota

Minneapolis, Minnesota

Nashua, New Hampshire

Raleigh, North Carolina

Cleveland, Ohio

Baker City, Oregon

Lexington, Virginia

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Gardeners' Notes:


On Aug 21, 2016, bernsflwrs from Berlin Heights, OH wrote:

Purchased one of these this spring. It has not bloomed, but is spreading via root. It gets about 6 hours of full sun. Needs more sun, or is this normal? Should I just leave the little plants or plant them out?
I'm really looking forward to it blooming. Of course it will be next year I guess.


On Dec 12, 2014, coriaceous from ROSLINDALE, MA wrote:

One of the best garden bellflowers. Floriferous, long-blooming, vigorous, more heat tolerant than most bellflowers. Looks similar to 'Kent Belle', but the stems are less inclined to topple.

The flowering season can be very long, however faded flowers are conspicuously ugly and need regular deadheading to look good. If you cut the stems to the ground after the first flush, this plant generally sends up a second set for a fall flowering.

A hybrid between C, punctata and C. trachelium, introduced by Christian Kress of Austria's Sarastro Nursery. This is a vigorous clump-former that does not inherit C. punctata's thuggish spreading habit.


On Aug 12, 2011, hairyjo from Danville, CA wrote:

I bought this mail order from Green Thumbs Galore and it is stunning in my garden. It kept blooming from early summer and now well into August with more buds on it. I dead head regularly. It gets very hot and dry here.


On Jun 16, 2011, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:

I must agree with the rave reviews. I planted this late last year and honestly didn't exect it to survive, let alone thrive the way it did. We had a very hard Minnesota winter. The straggly little plant that barely got in the ground before hard freezes and snow is a couple of feet tall and wide and blooming like crazy. The flowers do look like shriveled up prunes until they open, and then they are really large and beautiful against the light green foliage. I've had other bellflowers and thought the foliage had a rather weedy look, but this one is nice. For some reason I recall the taste of grape Kool-Aid when I look at the flowers....


On Jun 20, 2005, MaryE from Baker City, OR (Zone 5b) wrote:

I'm not positive on the variety of campanula that I have since I got a start from somebody else's garden. Mine is very hardy, no trouble, not invasive, does well anyplace I have put it and is always a joy to see in bloom. It blooms for quite a long time and is a nice blue that seems to go with anything growing nearby. An A+ kind of plant in my opinion.


On Oct 10, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

I bought one of these plants in July 04' in full bloom from a local nursery. I almost hesitated because of the price ($13) but it was a 2 gallon pot and the plant was absolutely breathtaking. The royal purple bells, of which the plant was covered - were up to approximately 3" long! I couldn't find much information on this plant so I watched it closely over the summer.

What is interesting is how the new buds look...deep purple (almost plum) and "shriveled" looking. When I first noticed this I actually trimmed some shoots that I thought were gone so as to encourage new growth. A week later I had a new shoot with the same shriveled-looking buds and a light went on! Suddenly, these buds burst open and you have these incredible flowers!

It's now October 10th and... read more