annual

Rose Clover

The Story

Plant Bio

Trifolium hirtum, commonly known as rose clover, is a winter annual herb native to Eurasia and North Africa that forms branched, densely hairy stems up to sixteen inches tall. In spring, it produces spherical, deep pink to purplish-red flower heads tightly enclosed by enlarged, prominently veined bracts.

The pale green, trifoliate leaves feature distinct pale crescents bordered by brownish-red lines and are covered in fine, appressed hairs. This species is highly valued for its ability to fix nitrogen in low-fertility soils and persist through dry summers via a robust, dormant seed bank.

Uses & Benefits:

Produces dense, spherical heads of deep pink flowers that provide a soft, naturalistic texture to dry meadows.

Serves as an effective winter cover crop and erosion control agent on dry, sloped terrains.

Fixes atmospheric nitrogen to enrich poor soils and provides nectar for generalist bees, honeybees, and butterflies.

Essentials

At a Glance

Plant Type

Annual

Height

16"

Width

12"

Light

Full Sun

Zones

6, 7, 8, 9, 10

Water

Low

Humidity

Low

Lifespan

Annual

Native To

Eurasia, North Africa

Toxicity

Non-toxic

Bloom period

Spring – Early summer

In flower about 4 months of the year

Planting

How to Grow

Sow seeds directly into well-drained soil in late summer or early autumn to align with winter-dominant rainfall.
Press the seeds lightly into the soil surface, ensuring good seed-to-soil contact without burying them deeply.
Water the area thoroughly to trigger germination, then rely on seasonal winter rains for establishment.
Allow the plants to flower and set seed in early summer to establish a persistent soil seed bank for the following year.

Pro Tip

Avoid applying nitrogen-rich fertilizers, as this species hosts root-nodule bacteria that fix their own nitrogen, and excess soil nitrogen will only encourage competing weeds.

Keep It Thriving

Care Guide

Do

Sow in a location that receives full sun throughout the day.
Ensure the soil has excellent drainage to prevent root rot.
Allow the plant to complete its annual cycle and drop seed for natural regeneration.

Don't

Do not overwater or plant in low-lying areas prone to waterlogging.
Do not apply heavy nitrogen fertilizers, which suppress natural nitrogen fixation.
Do not mow or graze the plants before they have successfully set seed if long-term persistence is desired.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Harvest
Pest Check
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Cover CropsErosion ControlMeadow PlantingsRevegetation

Companion Plants

Eschscholzia californica Lupinus bicolor

Multiply

Propagation Methods

Good to Know

Common Questions

Rose Clover questions

What zones can Rose Clover grow in?

Rose Clover is hardy in USDA Zones 6–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Rose Clover bloom?

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

Does Rose Clover need full sun?

Rose Clover does best in full sun (6+ hours).

Is Rose Clover drought tolerant?

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