Hardy Geranium, Cranesbill 'Brookside'


Family: Geraniaceae (jer-ay-nee-AY-see-ee) (Info)
Genus: Geranium (jer-AY-nee-um) (Info)
Cultivar: Brookside
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Foliage Color:

Unknown - Tell us

Bloom Characteristics:

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

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


24-36 in. (60-90 cm)


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)

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:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

7.9 to 8.5 (alkaline)

Patent Information:


Propagation Methods:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From hardwood heel cuttings

Seed Collecting:

Unknown - Tell us


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

Boise, Idaho

Mahomet, Illinois

Saint Charles, Illinois

Toluca, Illinois

Winnetka, Illinois

Hancock, Maine

Danvers, Massachusetts

Uxbridge, Massachusetts

Dearborn Heights, Michigan

Detroit, Michigan

Freehold, New Jersey

Elba, New York

Esperance, New York

Corvallis, Oregon

Knoxville, Tennessee

South Jordan, Utah

Tremonton, Utah

Lexington, Virginia

Vancouver, Washington

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Gardeners' Notes:


On Mar 26, 2015, bendipa from London,
United Kingdom wrote:

This is a good variety of Cranesbill with its conspicuous violet blue flowers and their white eyes. It flowers prolifically from June to October, but you have to cut the stems back after each flush of bloom to encourage the next one.

A word of caution about winter. The plant dies right back to the point that it disappears completely. Where I live there was no sign of life until the end of March, and I thought it had rotted away as I could not even see a crown. So it is deceptive, and even though it's a late starter there is no need to worry about its eventual reappearance..


On Oct 22, 2014, coriaceous from ROSLINDALE, MA wrote:

In the Chicago Botanic Garden's hardy geranium evaluations, this was one of six taxa (out of 111) that received the highest ratings based on heavy flower production, strong plant habits and good health, cultural adaptability and winter hardiness.

The Royal Horticultural Society has granted this cultivar its coveted Award of Garden Merit (AGM).

In Chicago (Z5b), it bloomed from late May to mid-August.

Its habit is its weakest feature: it's upright and leggy, to 24" tall by 38", and tends to sprawl. Cutting back hard after flowering improves appearance and health.

Like all blue-violet hardy geraniums, this one looks best when grown next to plants with colors that complement it, like lemon yellow or strong pink or chartreuse.
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On Jan 11, 2012, jTelgardener from Mahomet, IL wrote:

I'll say I did not enjoy growing this plant. It's flowers are nice enough, though I didn't feel they made up for the lack of structure the plant had. It might be nice when planted in masses where it could better hold itself up (I only had a clump of three plants) or in an informal garden where it can weave through its companions. I will say when it did weave through the leaves of the hostas or boxwood nearby it did look lovely. It does not spread quickly.


On Jun 14, 2006, Kristi_L from Kalamazoo, MI wrote:

A beautiful plant when not a lot else is blooming except the roses and honeysuckle in my garden in early June.

I have to stake it on both sides (it's a small hedge), so it remains upright and doesn't flop over other plants and hog the sun.



On May 9, 2006, RipKo97 from Toluca, IL wrote:

The plant is leggy but I trim back throughout the summer to control this. The flowers are beautiful and bloom all summer long.


On Jul 17, 2005, jamie68 from Vancouver, WA (Zone 8b) wrote:

Tends to be a bit leggy, but a really pretty Geranium anyway! Plant it where it can drape over a wall, or weave thru other perennials and it is a winner!!!!