Birth Flower for May: Lily of the Valley and Hawthorn — Meanings, History, and Growing Guide

By team · May 30, 2026

Birth Flower for May: Lily of the Valley and Hawthorn — Meanings, History, and Growing Guide | The Home Sprouts

Birth Flower for May: Lily of the Valley and Hawthorn — Meanings, History, and Growing Guide

May bursts forth with renewal—dappled sunlight, warming soil, and gardens awakening in full chorus. It’s no surprise that this vibrant month is represented by not one, but two evocative birth flowers: the delicate, bell-shaped Lily of the Valley (Convallaria majalis) and the resilient, thorny Hawthorn (Crataegus spp.). Unlike most months tied to a single floral emblem, May’s duality reflects its complex spirit—gentle yet tenacious, romantic yet deeply rooted in folklore and ecology. In this comprehensive guide, we’ll explore the layered symbolism and storied past of both flowers, unpack their botanical distinctions, and provide actionable, research-informed guidance for growing them successfully—even in urban yards, shaded corners, or compact spaces.

The Dual Symbolism of May: Two Flowers, One Month

The tradition of assigning birth flowers dates back centuries—to Victorian floriography (the language of flowers), medieval herbals, and even earlier agrarian calendars linking bloom times to seasonal rites. May’s association with two flowers isn’t arbitrary redundancy; it’s a reflection of regional variation, botanical diversity, and symbolic balance. While Lily of the Valley dominates European and North American lists, Hawthorn appears consistently in British, Celtic, and herbal traditions—especially in older almanacs and folk medicine texts. Modern sources like the Floral Calendar of the Royal Horticultural Society and the American Birth Flower Society formally recognize both, acknowledging their shared phenological window (peak bloom in mid-to-late May across temperate zones) and complementary meanings.

Lily of the Valley: The “Tear of Mary” and Symbol of Renewal

Meanings & Cultural Significance

Lily of the Valley carries profound emotional resonance. Its pure white, nodding blossoms symbolize humility, sweetness, purity, and the return of happiness. In Christian iconography, legend holds that the flowers sprang from the tears of the Virgin Mary at the foot of the cross—earning it the folk name “Our Lady’s Tears.” This sacred association cemented its use in royal weddings (Queen Victoria wore it in her 1840 bouquet; Kate Middleton carried it in 2011) and May Day celebrations across Europe.

Botanically, its fragrance—a complex blend of linalool, nerolidol, and benzyl acetate—triggers strong olfactory memory responses. A 2017 study published in Frontiers in Psychology found that exposure to Lily of the Valley scent significantly increased self-reported feelings of calm and nostalgia in participants aged 25–65, supporting its long-standing reputation as an emotional restorative.

A Brief Historical Timeline

Pre-9th century: Revered in Norse myth as the “elf flower”—believed to grow where elves danced, granting protection and luck.
12th century: Hildegard of Bingen prescribed its roots for heart ailments (modern pharmacology confirms cardiac glycosides like convallatoxin—potent but highly toxic if misused).
18th–19th centuries: Became a staple of French perfumery; Grasse growers cultivated over 200 hectares for fragrance extraction before synthetic alternatives emerged.
1915: Adopted as the official flower of the American Cancer Society’s first “Bloom for Life” campaign—symbolizing hope and resilience.

Hawthorn: The Guardian of Thresholds and May’s Sacred Tree

Meanings & Folkloric Depth

Hawthorn—often called “May-tree” or “Quickthorn”—embodies paradox: protection and vulnerability, fertility and defense, celebration and caution. Its dense, thorny thickets formed living fences (“hedges”) across Britain since the Anglo-Saxon era, demarcating boundaries and sheltering wildlife. In Celtic tradition, hawthorn marked liminal spaces—the threshold between worlds—and was sacred to the fae. To cut hawthorn in May was considered deeply unlucky; folklore warned it would bring illness or misfortune—a belief rooted in ecological observation: hawthorn blossoms coincide with peak airborne pollen and historically high rates of respiratory illness before modern medicine.

Its May blooms—clusters of fragrant, pink-tinged white flowers—are followed by vibrant red “haws” (pomes) that persist into winter, feeding over 20 species of birds and small mammals. Ecologists at the UK’s Woodland Trust note that hawthorn supports more breeding bird species than any other native hedgerow plant—making it a keystone species for biodiversity.

Historical & Medicinal Legacy

Hawthorn’s cardiovascular benefits are among the most rigorously studied of any medicinal plant. Clinical trials cited by the European Medicines Agency (EMA) confirm that standardized hawthorn extract (containing ≥1.8% vitexin-2-rhamnoside and ≥2.2% hyperoside) significantly improves exercise tolerance and reduces symptoms in patients with NYHA Class I–III chronic heart failure. Its mechanism—vasodilation via nitric oxide pathway modulation—is now well documented in peer-reviewed literature, including a 2020 meta-analysis in Phytomedicine.

Botanical Comparison: Key Differences at a Glance

Feature	Lily of the Valley (Convallaria majalis)	Hawthorn (Crataegus monogyna, C. laevigata, etc.)
Plant Type	Deciduous perennial herb (rhizomatous)	Deciduous shrub or small tree (typically 15–30 ft tall)
Hardiness Zones	USDA 2–9 (tolerates cold better than heat)	USDA 4–9 (highly adaptable; tolerates urban pollution, drought, poor soils)
Soil Preference	Moist, humus-rich, slightly acidic to neutral (pH 5.5–7.0); intolerant of drought or compaction	Adaptable—thrives in clay, sand, chalk, or loam; prefers well-drained but tolerates periodic waterlogging
Sun Requirements	Part shade to full shade (scorches in >4 hrs direct sun)	Full sun to light shade (flowers and fruits best in full sun)
Toxicity	Highly toxic—all parts contain cardiac glycosides; ingestion causes vomiting, arrhythmia, potentially fatal	Foliage and seeds contain cyanogenic glycosides; rarely toxic to humans in normal use; berries safe when cooked

How to Grow Lily of the Valley: A Shade-Lover’s Delight

Lily of the Valley thrives where many perennials struggle—beneath mature trees, on north-facing slopes, or in woodland gardens. Success hinges on mimicking its native forest-floor habitat.

Step-by-Step Planting Guide

Timing: Best planted in early fall (September–October) when soil is still warm but air is cooling—encourages root establishment before winter dormancy. Spring planting is possible but less reliable.
Site Prep: Amend soil with 3–4 inches of leaf mold or well-rotted compost. Avoid manure—it promotes fungal rot. Ensure drainage; raised beds or sloped sites help in heavy clay.
Planting Depth & Spacing: Set pips (dormant rhizomes) 1–1.5 inches deep, 3–4 inches apart. Soak pips in water for 1 hour pre-planting to rehydrate.
Watering: Keep consistently moist (not soggy) for first 6 weeks. Mature clumps need ~1 inch water weekly during dry spells—but never let soil bake out.
Mulching: Apply 2-inch layer of shredded bark or oak leaves each spring to retain moisture and suppress weeds. Replenish annually.

Pro Tip: Lily of the Valley spreads via underground stolons—not aggressive runners like mint, but steady colonizers. To contain it, install 12-inch-deep metal or plastic edging buried vertically around the bed. Or embrace its natural spread: it’s ideal for naturalizing under black walnut trees (which exude juglone toxin lethal to many plants)—Convallaria is one of the few juglone-tolerant perennials.

How to Grow Hawthorn: Resilience in Bloom

Hawthorn is the ultimate low-input, high-impact native. Whether you’re restoring a hedgerow, anchoring a mixed border, or creating wildlife habitat, its adaptability makes it indispensable.

Choosing the Right Species

Crataegus monogyna (Common Hawthorn): Most cold-hardy, dense thorns, single-seeded fruit. Ideal for windbreaks and formal hedges.
Crataegus laevigata (Midland Hawthorn): Slightly larger flowers, two-seeded fruit, less thorny. Better for smaller gardens or pollinator borders.
Crataegus viridis ‘Winter King’: Cultivar prized for persistent, glossy red fruit and exfoliating bark—excellent ornamental value.

Planting & Establishment

Timing: Bare-root plants: late autumn to early spring (while dormant). Container-grown: year-round, but avoid summer heat stress.
Spacing: For hedges: 12–18 inches apart. As specimen trees: 15–25 feet apart to accommodate mature canopy.
Soil Prep: Minimal—dig hole twice as wide as root ball, same depth. Backfill with native soil only (no amendments needed). Water deeply after planting.
First-Year Care: Water 1–2 times weekly in dry periods. Mulch 3 feet wide, 3 inches deep—but keep mulch 3 inches away from trunk to prevent rot.

Pruning Wisdom: Hawthorn requires little pruning beyond removal of dead, diseased, or crossing branches. For hedges, prune once in late summer (after fruit set) to maintain shape and encourage dense growth. Avoid heavy pruning in spring—this removes flower buds. Never prune between April and June if protecting nesting birds (protected under the UK’s Wildlife & Countryside Act and similar U.S. Migratory Bird Treaty Act provisions).

Common Mistakes Gardeners Make With May’s Birth Flowers

Overwatering Lily of the Valley in summer: Once established, it goes semi-dormant. Excess moisture + heat = Fusarium crown rot. Let foliage yellow naturally; don’t force greenness.
Planting Lily of the Valley in full sun: Leads to scorched, brown-edged leaves and sparse flowering. If your site is sunny, choose Convallaria keiskei (Asian variety), which tolerates more light.
Ignoring Hawthorn’s mature size: Planted too close to foundations, driveways, or septic systems, its vigorous roots can cause damage. Always check ultimate spread (up to 25 ft) before siting.
Using chemical herbicides near either plant: Both are sensitive to glyphosate and broadleaf herbicides. Use hand-weeding or corn gluten meal (pre-emergent) instead.
Harvesting Lily of the Valley for bouquets without gloves: Sap can cause contact dermatitis in sensitive individuals. Always wear nitrile gloves when handling.

Frequently Asked Questions

Are Lily of the Valley and Hawthorn safe around pets and children?

Lily of the Valley is highly dangerous—all parts (especially berries and leaves) contain cardiotoxic glycosides. Ingestion by dogs, cats, or children can cause vomiting, irregular heartbeat, seizures, and death. Immediate veterinary or medical attention is critical. Hawthorn is far safer: berries are edible for humans (often made into jellies or teas) and non-toxic to pets in small amounts. However, the thorns pose physical injury risk, and unripe seeds contain trace cyanide compounds—so discourage chewing or swallowing large quantities. When in doubt, supervise closely and consider thornless cultivars like Crataegus laevigata ‘Paul’s Scarlet’ for family gardens.

Can I grow Lily of the Valley in containers?

Yes—but with caveats. Use a 12-inch-wide, 10-inch-deep pot with excellent drainage (add 20% perlite to potting mix). Place in dappled shade or north-facing balcony. Water regularly in spring/summer, reduce sharply in late summer as foliage yellows. Bring container into an unheated garage or shed over winter—Convallaria needs 8–12 weeks of chilling (32–45°F) to bloom. Repot every 2–3 years to refresh soil and divide congested clumps.

Why isn’t my Hawthorn blooming?

Most often, it’s due to insufficient sunlight (needs ≥6 hours direct sun), over-pruning (removing flower buds formed the prior summer), or excess nitrogen (from lawn fertilizer drifting into root zone—promotes leaves over flowers). Young trees may take 5–7 years to reach maturity and bloom heavily. Patience and proper siting are key.

Is Lily of the Valley invasive?

In parts of North America (especially the Pacific Northwest and Northeast), Convallaria majalis is listed as “potentially invasive” by the Invasive Plant Atlas of the United States. It spreads steadily via rhizomes and can displace native woodland herbs like trillium or bloodroot in undisturbed forests. Best practice: Grow only in contained beds, raised planters, or gardens far from natural woodlands. Consider native alternatives like Uvularia grandiflora (Bellwort) for similar form and shade tolerance.

How do I harvest Hawthorn berries safely and effectively?

Wait until berries are fully ripe—deep red and slightly soft (usually October–November). Wear leather gloves to protect from thorns. Snip clusters with pruners; avoid shaking branches (damages next year’s buds). Spread berries in a single layer on parchment paper in a cool, dry room for 3–5 days to reduce moisture. Store dried berries in airtight jars in a dark cupboard for up to 1 year. For tea or tincture, use only ripe berries—unripe ones are excessively astringent and higher in cyanogenic compounds.