Cruciata spp.

crosswort

Rubiaceae

Europe, North Africa, and temperate Asia

Attracts Pollinators Fragrant (light)

SunFull Sun – Part Shade

WaterMedium

HardinessZones 4–8

Overview

Cruciata spp. is a genus of about eight herbaceous perennials in the madder family, native to Europe, North Africa, and temperate Asia. Its most familiar member, C. laevipes, the crosswort, sends up weak, four-angled stems 8-24 inches (20-60 cm) tall from creeping rootstocks. The hairy, pale-green leaves are carried in whorls of four, giving the cruciform pattern that names the genus. Small yellow flowers, each about 0.1 inch (2-3 mm) across and honey-scented, cluster in the leaf axils through late spring and early summer. The plant scrambles through grass and over low vegetation rather than standing upright, and it spreads steadily by rhizomes to form loose patches. Cruciata spp. grows in rough grassland, hedge banks, woodland edges, and roadsides, usually on neutral to calcareous soils of moderate fertility. It tolerates a wide range of conditions but grows most strongly in part shade with steady moisture. In gardens it is little cultivated and can spread into a weed of borders. The whorled foliage dies back to the rootstock each winter and reappears in spring.

Native Range

Cruciata spp. is native to Europe, North Africa, and temperate western and central Asia. C. laevipes is widespread across Europe in rough grassland, hedge banks, and woodland margins, typically on neutral to lime-rich soils.

Suggested Uses

Cruciata spp. is occasionally grown in wildflower meadows, naturalistic plantings, and hedge-bank schemes for its whorled foliage and honey-scented flowers. It suits informal grassy areas where its scrambling, spreading habit is an advantage. The flowers are a minor nectar source for small bees and flies.

How to Identify

Identify Cruciata spp. by its slender four-angled stems and hairy leaves arranged in whorls of four, forming a cross when viewed from above. Clusters of tiny yellow honey-scented flowers sit in the leaf axils in late spring. The weak, scrambling stems and creeping rhizomatous habit separate it from the upright bedstraws of the related Galium spp..

Appearance

Size & Dimensions

Height8" - 2'

Width/Spread1' - 3'

Colors

Flower Colors

yellow

Foliage Colors

green

Bloom Information

Bloom Period

~8 weeks

Spring Summer

Flowering occurs in late spring and early summer, broadly May to July across the European range. The small yellow flowers open in axillary clusters and carry a noticeable honey scent. Seed sets soon after, and the upper stems begin to die back by late summer.

Detailed Descriptions

Foliage Description

pale green

Growing Conditions

Sun Requirements

SunFull Sun SunPartial Shade

Requires 3-8 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 8.0(Neutral)

357912

Soil Types

loam clay chalk

Drainageaverage

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

1-2 years

Care & Maintenance

Care Guide

Cruciata spp. grows in full sun to part shade on most moisture-retentive soils of neutral to alkaline reaction. It is undemanding and tolerates rough grassland conditions, competing among grasses and other herbs. Steady soil moisture through the growing season produces the fullest foliage, while dry sites cut growth short. The rhizomes spread persistently, so the plant can colonize beyond its intended area in cultivated ground. Plants die back to the rootstock over winter and need no winter cover in temperate climates. Division of the rootstock in autumn or spring is the simplest means of increase.

Pruning

As a herbaceous perennial, Cruciata spp. needs no pruning of woody growth. Cutting back the dying stems in late summer or autumn tidies the patch and limits self-seeding. Lifting and dividing the rhizomes also keeps the spread in check.