4 named cultivars

perennial

Bigroot Geranium

Geranium macrorrhizum

The Story

Plant Bio

Geranium macrorrhizum, commonly known as bigroot geranium, is a hardy perennial characterized by its sprawling habit and aromatic foliage.

Notable for its vigorous growth and ability to thrive in a variety of soil types, making it an excellent ground cover.

Uses & Benefits:

Geranium macrorrhizum provides attractive foliage and fragrant flowers, enhancing garden aesthetics.

Its groundcover nature helps prevent soil erosion and suppress weeds.

Supports pollinators like bees and butterflies, promoting biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

15 inches

Width

24 inches

Light

Full Sun, Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Low to moderate

Humidity

Average

Lifespan

Perennial

Native To

Southern Europe, Balkan Peninsula

Toxicity

Non-toxic to humans and pets

Planting

How to Grow

Choose well-draining soil with moderate fertility.
Tuck cuttings or seeds in early spring for best results.
Water regularly until established, then reduce frequency.
Mist cuttings to maintain humidity during rooting.
Thin out crowded plants to promote airflow.
Apply mulch to conserve moisture and suppress weeds.

Pro Tip

Provide partial shade in hot climates to prevent leaf scorch.

Keep It Thriving

Care Guide

Do

Water consistently during dry periods 🌱
Apply a balanced fertilizer in spring
Prune lightly after flowering to maintain shape

Don't

Avoid overwatering to prevent root rot ❌
Don’t place in full shade—plants need some sun
Refrain from heavy fertilizing late in the season

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Mulch
Plant
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Silver-foliaged groundcoverFragrant border plantErosion control on slopes

Companion Plants

SedumLavender SalviaThyme Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Bigroot Geranium questions

What zones can Bigroot Geranium grow in?

Bigroot Geranium is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Bigroot Geranium deer resistant?

Yes — Bigroot Geranium is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Bigroot Geranium bloom?

Bigroot Geranium typically blooms in late spring to early summer through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Bigroot Geranium need full sun?

Bigroot Geranium does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Bigroot Geranium drought tolerant?

Yes — once established (usually after the first full season), Bigroot Geranium handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.