Thornless Cockspur Hawthorn

Crataegus crus-galli var. inermis

A superior small ornamental tree that delivers spectacular spring flowers, vibrant orange-red fall color, and persistent red berries without the thorns of typical hawthorns. Its dense, horizontal branching creates an architectural silhouette that looks stunning in winter, making it a four-season performer for smaller landscapes. Wildlife love the berries, and gardeners love the manageable size.

Sun

Full sun to partial shade

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Zones

3–7

USDA hardiness

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Height

15-35 feet

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Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Transplant

Showing dates for Thornless Cockspur Hawthorn in USDA Zone 7

All Zone 7 ornamental-tree →

Zone Map

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Thornless Cockspur Hawthorn · Zones 3–7

What grows well in Zone 7? →

Growing Details

Difficulty

Easy

Spacing20-25 feet

SoilAdaptable to various soils, tolerates clay and alkaline conditions

pH6.0-8.0

WaterLow — drought tolerant

SeasonSpring and Summer

FlavorN/A

ColorWhite spring flowers, orange-red fall foliage, bright red berries

SizeSmall to medium ornamental tree

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	—	June – August	—	—
Zone 4	—	June – July	—	—
Zone 5	—	May – July	—	—
Zone 6	—	May – July	—	—
Zone 7	—	May – June	—	—

Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Clay, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Moist. Height: 15 ft. 0 in. - 35 ft. 0 in.. Spread: 20 ft. 0 in. - 35 ft. 0 in.. Spacing: 24-60 feet, more than 60 feet. Growth rate: Medium. Maintenance: Medium. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.

Harvesting

Small deep-red pome with 1 to 5 pyrenes that resemble the “stones” in related plums, peaches, etc. Sometimes called the ‘haw’.

Color: Red/Burgundy. Type: Pome. Length: < 1 inch. Width: < 1 inch.

Garden value: Edible, Showy

Harvest time: Fall

Edibility: Fruit can be eaten raw or cooked and used in jellies, but most people leave it for the birds.

Storage & Preservation

Fresh berries store refrigerated in breathable containers for 2-3 weeks, maintaining their vibrant color and firm texture. Spread them in a single layer on a tray lined with paper towels to prevent moisture buildup. For longer preservation, freeze whole berries on a baking sheet, then transfer to freezer bags for up to 8 months—they retain color beautifully and work well in dried arrangements. Drying is also effective: lay berries on screens in a warm, well-ventilated space or use a low-temperature dehydrator (140-160°F) for 1-2 weeks until fully hardened. Dried berries are lovely in wreaths and garlands. Some gardeners simmer berries with sugar for a decorative jelly or tea infusion, though hawthorn berries are primarily ornamental rather than culinary.

History & Origin

Origin: Eastern North America, Canada to Georgia, west to Mississippi

Advantages

+Attracts: Butterflies, Pollinators, Songbirds
+Edible: Fruit can be eaten raw or cooked and used in jellies, but most people leave it for the birds.

Companion Plants

Lavender, yarrow, and clover planted beneath a Thornless Cockspur Hawthorn do something concrete: they attract parasitic wasps and predatory beetles that prey on scale insects and Dysaphis crataegi aphids — two pests this tree picks up reliably. Clover fixes nitrogen at the root zone, which suits a tree that doesn't need heavy feeding, and stays low enough to avoid real water competition. Black walnut is a hard no — juglone, the allelopathic compound concentrated in its roots, hulls, and leaf litter, disrupts root respiration in susceptible woody plants, and hawthorns show enough sensitivity that the 50-foot clearance most sources recommend isn't worth gambling on.

Plant Together

Lavender

Repels aphids and other pests while attracting beneficial pollinators

Marigold

Deters nematodes and aphids, attracts beneficial insects

Comfrey

Deep roots bring nutrients to surface, acts as dynamic accumulator

Clover

Fixes nitrogen in soil and provides ground cover to retain moisture

Chives

Repels aphids and improves overall tree health through companion effect

Yarrow

Attracts beneficial insects and improves soil health

Nasturtium

Acts as trap crop for aphids and adds nutrients when composted

Rosemary

Natural pest deterrent and drought-tolerant ground companion

Keep Apart

Black Walnut

Produces juglone which is toxic to hawthorn and inhibits root development

Eucalyptus

Allelopathic properties suppress growth of nearby plants including hawthorns

Sunflower

Competes heavily for nutrients and water, may stunt hawthorn growth

Pests & Disease Resistance

Resistance

Good resistance to fire blight and rust diseases

Common Pests

Aphids, scale insects, spider mites

Diseases

Fire blight, cedar-hawthorn rust, leaf blight

Troubleshooting Thornless Cockspur Hawthorn

What you'll see, why it happens, and what to do about it.

Bright orange powdery spots on upper leaf surfaces, with tube-like projections on the undersides, appearing mid to late spring

Likely Causes

Cedar-hawthorn rust (Gymnosporangium globosum) — a fungal disease that requires eastern red cedar (Juniperus virginiana) nearby to complete its life cycle
Planting within a few hundred feet of junipers or red cedars

What to Do

1.Remove any eastern red cedar or juniper within 1,000 feet if possible — that's the alternate host and the disease can't cycle without it
2.Apply a copper-based or myclobutanil fungicide at bud break in spring, before symptoms appear, if rust is a recurring problem on your site
3.Rake and dispose of fallen leaves in autumn — do not compost them

Branch tips wilting and turning dark brown or black in a shepherd's crook shape, especially after wet spring weather

Likely Causes

Fire blight (Erwinia amylovora) — a bacterial disease that spreads rapidly during warm, wet weather between 65–86°F
Overhead irrigation or rain that splashes bacteria from infected tissue into new growth

What to Do

1.Prune out infected wood at least 8–12 inches below the visible discoloration; sterilize your pruners with 70% isopropyl alcohol between every cut
2.Avoid high-nitrogen fertilizers that push soft, fast growth — fire blight moves fastest through succulent new shoots
3.Time any pruning for dry weather to avoid spreading the bacteria on wet tools or hands

Sticky residue on leaves and branches, with small soft-bodied clusters on new growth and a sooty black coating developing on leaf surfaces

Likely Causes

Aphids (likely hawthorn aphid, Dysaphis crataegi) feeding on new shoots and secreting honeydew
Sooty mold (Capnodium sp.) colonizing the honeydew deposits — it's secondary to the aphid problem, not a separate infection

What to Do

1.Knock aphid colonies off with a firm spray of water from a hose — do this in the morning so foliage dries before evening
2.If populations persist, apply insecticidal soap directly to the colonies; repeat every 5–7 days for 2–3 applications
3.The sooty mold will clear on its own once aphids are controlled; no separate fungicide treatment needed

Frequently Asked Questions

How tall does Thornless Cockspur Hawthorn grow?▼

Thornless Cockspur Hawthorn matures to 25-35 feet tall and equally wide, though it grows slowly—expect 12-15 feet within 10 years. Its natural spreading form with horizontal branches creates a broad crown, making it ideal for landscapes where you need height without excessive width. This manageable size suits residential properties and urban settings far better than full-size native hawthorns.

Is Thornless Cockspur Hawthorn good for beginners?▼

Yes—it's one of the easiest ornamental trees to grow. It tolerates poor soils, requires minimal fertilizing, adapts to clay and alkaline conditions, and has strong disease resistance. Plant it, water during establishment, and prune lightly in late winter. The main consideration is patience: it grows at a moderate pace, so plan accordingly for landscape design.

Can you grow Thornless Cockspur Hawthorn in containers?▼

Yes, but with limitations. Young trees can grow in large containers (20+ gallons) for 3-5 years, ideal for specimen showcase or patio use. However, they eventually outgrow containers and prefer in-ground planting. Container-grown trees need consistent watering and feeding, as they lack the nutrient access of landscape soil. Shelter from harsh winter winds, especially in northern zones.

When should I plant Thornless Cockspur Hawthorn?▼

Spring and fall are equally suitable for container-grown trees. Plant in spring (April-May) in northern zones to allow maximum establishment before winter. Fall planting (September-October) works well in milder regions, giving trees winter root establishment. Avoid planting in summer heat or late fall where winter arrives quickly. Always plant before leaves emerge for bare-root stock.

How much sun does Thornless Cockspur Hawthorn need?▼

Full sun to partial shade (4-6+ hours of direct sunlight) produces the best flowering and fall color. Trees tolerate afternoon shade in hot southern zones but flower sparsely in deep shade. Partial shade is acceptable but may reduce berry production slightly. Maximum sun exposure maximizes all four seasons of ornamental value.

Thornless Cockspur Hawthorn vs. regular Cockspur Hawthorn—what's the difference?▼

The thornless cultivar eliminates the 3-4 inch thorns found on standard Cockspur Hawthorn, making it safer for residential landscapes. Both offer identical white spring flowers, orange-red fall color, and persistent red berries. Both tolerate poor soils and have similar disease resistance. The choice comes down to safety: thornless is preferred in yards with children or near walkways; standard is fine for naturalized settings.