How to Grow Myrtoun Ruby
Myrtoun Ruby
Rubus fruticosus 'Myrtoun Ruby'
fruitMyrtoun Ruby is a thornless blackberry cultivar known for its large, deep red berries that ripen to nearly black when fully mature. This vigorous, semi-erect bramble produces heavy yields of sweet, flavorful fruit ideal for fresh eating and preserves. It is valued for its thornless canes, making harvesting significantly easier than traditional blackberry varieties.
When should you plant Myrtoun Ruby in your zone?
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Example Myrtoun Ruby timeline · Pittsburgh, PA (Zone 6b)
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Plant Myrtoun Ruby
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Myrtoun Ruby
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Myrtoun Ruby dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 6-8; hardy to zone 5 with winter protection
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Get my Myrtoun Ruby timeline →Growth Stages
Establishment (Year 1)
Full first growing seasonNew canes emerge and grow vigorously, establishing root systems and vegetative foliage.
Remove any flowers that appear in year 1 to redirect energy to root and cane development. Water regularly, apply mulch, and avoid heavy pruning except to remove dead/diseased wood.
Dormancy
December-MarchCanes enter winter rest; foliage dies back and canes turn reddish-brown.
Prune out dead, diseased, or weak canes in late winter (February-March in Northern Hemisphere). Cut back canes to 3-4 feet tall if needed. Apply winter mulch in zones 5-6.
Flowering
April-June (depending on zone)Small white to pale pink flowers appear along canes in spring/early summer.
Ensure adequate moisture and avoid frost damage if late cold snaps occur. Do not apply nitrogen-heavy fertilizers as this promotes excessive foliage over flowers.
Fruiting & Ripening
6-8 weeks per seasonGreen berries develop and gradually ripen from red to dark red/nearly black over 3-4 weeks. Ripe berries are sweet and firm.
Maintain consistent moisture to prevent splitting and drop. Provide support or trellis for semi-erect canes. Monitor for pests and disease; thin dense foliage for air circulation.
Harvest & Post-Harvest
July-SeptemberPeak harvest of fully ripe berries; canes begin to slow production late in the season.
Harvest ripe berries every 2-3 days. After harvest, begin planning next year's cane management. Cut out old fruiting canes after they finish producing to make room for new primocanes.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick in early morning, use neem oil or spinosad spray, maintain healthy vigor to withstand light defoliation
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Increase humidity, spray with water to dislodge, use miticides if severe (acaricides)
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Remove and destroy affected canes immediately, avoid wounding canes during pruning, maintain plant health
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Use fine mesh netting during ripening, harvest ripe fruit frequently, use insecticidal sprays (spinosad) as a last resort
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Spray with neem oil or insecticidal soap, encourage beneficial insects, maintain adequate watering
Uses
Fresh eating and desserts
CulinaryMyrtoun Ruby berries are exceptionally sweet and flavorful when fully ripe, ideal for eating fresh, in desserts, ice cream, and pastries. [source]
Preserves and jams
CulinaryThe high pectin content and firm texture make these berries excellent for jams, jellies, compotes, and wine production. [source]
Immune and digestive support
MedicinalBlackberries are rich in antioxidants, vitamin C, and fiber, traditionally used to support immune function and digestive health. [source]
Natural dye
HouseholdRipe blackberries can be used to create deep purple and blue dyes for fabrics and crafts. [source]
Wildlife habitat and food
WildlifeBlackberry brambles provide excellent cover and food for birds, beneficial insects, and pollinators, 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
Begin harvesting in mid to late summer when berries are fully dark red to nearly black and easily detach from the core with gentle pressure. Do not harvest red berries—they are underripe and sour. Pick every 2-3 days at peak ripeness for best flavor. The thornless canes make harvesting convenient without protective gloves, though long sleeves are still recommended. Harvest in cool morning hours for best quality. Berries do not ripen after picking.
Fun Facts
- 🌱 Myrtoun Ruby is a thornless cultivar, making it one of the few blackberry varieties that can be harvested without protective gloves, a significant practical advantage over wild blackberries.
- 🌱 Blackberries are technically not berries but aggregate fruits composed of many small drupelets; the entire cluster ripens together over several days, which is why Myrtoun Ruby's color change from red to nearly black is so visually striking.
- 🌱 In traditional herbal medicine, blackberry leaves have been used for centuries to make astringent teas believed to support digestive and immune health, though the berries themselves are prized primarily for their superior flavor and antioxidant content.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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