How to Grow Triple Crown Blackberry

Wikimedia Commons

Triple Crown Blackberry

Rubus fruticosus 'Triple Crown'

fruit

Triple Crown is a thornless, trailing blackberry variety known for producing large, sweet berries with excellent flavor. It's a high-yielding cultivar that produces fruit on floricanes (two-year-old canes) and is favored by home gardeners for its disease resistance and ease of harvest due to its thornless stems.

When should you plant Triple Crown Blackberry in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Triple Crown Blackberry timeline →

Example Triple Crown Blackberry timeline · Pittsburgh, PA (Zone 6b)

Plant Triple Crown Blackberry
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Triple Crown Blackberry
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Triple Crown Blackberry dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily minimum; 8+ hours preferred for best fruiting

💧

Water: Consistent moisture during growing season and fruit development; approximately 1-2 inches per week. Water deeply at soil level to avoid foliage diseases. Reduce watering after harvest but maintain moderate moisture through dormancy.

📏

Spacing: 36 inches

📅

Days to maturity: Fruiting begins in year 2-3 after planting; full production by year 3-4

🌱

Planting depth: Plant bare-root canes at same depth they were growing; transplants at soil line

Soil

Type: Well-draining loamy soil with good organic matter content

pH: 6.0-6.8

Amendments:

Compost or well-rotted manure Peat moss Aged bark Sulfur if pH is too high

Growing Zones

Find your zone →

Thrives in zones 5-9, with best performance in zones 6-8

5a 5b 6a 6b 7a 7b 8a 8b 9a

Get my Triple Crown Blackberry timeline →

Growth Stages

Establishment (Year 1)

12 months

Newly planted canes develop root systems and send up new shoots. Little to no flowering occurs in the first year.

Keep soil consistently moist but not waterlogged. Remove flower buds if they appear. Prune back canes to 12 inches to encourage strong root development. Apply 2-3 inches of mulch.

Vegetative Growth (Year 2, Spring-Summer)

5-6 months

Vigorous cane growth; the plant produces long, trailing stems with healthy green foliage. Some floricanes (second-year canes from year 1) may begin flowering.

Provide sturdy trellis or support system; trailing varieties need secure anchoring. Train canes horizontally or along supports. Fertilize with balanced fertilizer in early spring. Remove any diseased or damaged canes.

Flowering (Year 2, Late Spring-Early Summer)

3-4 weeks

White to pale pink flowers appear in clusters along the second-year floricanes. Flowers are attractive and bee-pollinated.

Ensure adequate water and nutrients to support flower development. Do not prune flowering canes. Encourage pollinator visits with nearby flowering plants. Monitor for pests.

Fruiting (Year 2-Ongoing, Summer)

6-10 weeks depending on temperature

Berries develop from flowers and mature to deep black color over 3-4 weeks. Individual berries can reach 2+ inches in length. Fruit is firm yet juicy with excellent sweet-tart flavor.

Maintain consistent watering as berries develop and mature. Harvest ripe berries regularly to encourage continued production. Protect from birds with netting if needed. Remove fruited canes after harvest (summer pruning).

Dormancy & Pruning (Late Summer-Winter)

4-6 months

After harvest, the plant enters dormancy. Canes that produced fruit die back naturally. New primocanes (first-year canes) continue growing and will fruit next year.

Remove all floricanes (2-year-old canes that fruited) after final harvest. Train and tie down new primocanes to supports for horizontal growth. In late winter/early spring before growth, thin out weak or damaged primocanes. Apply dormant oil spray if needed.

Companion Planting

Plan your garden →

Plant with:

Borage Yarrow Mint Raspberry Blueberry Marjoram Thyme

Avoid planting near:

Fennel Tomatoes Potatoes Other Rubus species (to prevent disease spread) Caneberries of different species in immediate proximity

Common Pests

Increase humidity, strong water spray to dislodge, insecticidal soap, or miticides if severe
Hand-pick in early morning, use traps away from plants, neem oil, or systemic insecticides
Remove and destroy infested canes, prune canes below the wilting point, keep plants vigorous
Remove and destroy affected canes, maintain plant vigor, apply insecticides at appropriate timing in fall
Remove infected canes, improve air circulation, apply fungicides during dormancy, avoid overhead watering
Prune out diseased canes below the infection, sterilize tools, improve drainage and air flow

Uses

🍳

Fresh eating and desserts

Culinary

Triple Crown berries are excellent for eating fresh, with a sweet, complex flavor and large size that makes them ideal for desserts, pies, cobbler, and layered cakes. The low acid and high sugar content make them superior to many commercial varieties. [source]

🍳

Jam and preserves

Culinary

Their high pectin and sugar content make Triple Crown blackberries ideal for making jam, jelly, and preserves with excellent gel set and rich flavor without excessive added sugar. [source]

💊

Antioxidant and anti-inflammatory benefits

Medicinal

Blackberries contain high levels of anthocyanins and polyphenols with demonstrated antioxidant and anti-inflammatory properties, traditionally used in herbal medicine for immune support and digestive health. [source]

🏠

Dye production

Household

Blackberry leaves and unripe berries can be used to create natural dyes ranging from deep purple to black for textiles and other craft projects. [source]

🦋

Wildlife and pollinator support

Wildlife

The spring flowers attract bees, butterflies, and other pollinators, while mature berries provide nutritious food for birds and small mammals, making Triple Crown excellent for supporting biodiversity. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Berries are ready to harvest when fully black and slightly soft to gentle pressure, typically mid-June through August depending on climate. Pick berries when dry in the morning for best flavor. Handle gently to avoid bruising. Ripe berries detach easily from the plant. Harvest every 2-3 days during peak season. The thornless stems make harvesting easy and safe.

Fun Facts

🌱 Triple Crown is completely thornless (armless), making it the only major thornless blackberry variety that produces berries on both first-year and second-year canes, allowing for flexibility in management.
🌱 The variety was developed in Maryland and released by the USDA in 2002, combining the best traits of earlier thornless cultivars with improved disease resistance and larger fruit size.
🌱 A single Triple Crown plant can produce 15-20+ pounds of berries per year once established, making it one of the most productive blackberry varieties available to home gardeners.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Crown Cultivar Full Sun Mulch Trellis

Shop Triple Crown Blackberry plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Triple Crown Blackberry planting timeline

Tell us your zip code and we'll calculate exactly when to start Triple Crown Blackberry seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Triple Crown Blackberry timeline →