MANREGION walnut - Juglians regia

🌰 ‘Manregion’ Walnut Tree 

🔸 Full name

• Common name: ‘Manregion’ Walnut Tree
• Botanical name: Juglans regia ‘Manregion’
• Family: Juglandaceae
• Type: Nut tree (common walnut tree)

🌳 General description

• Origin: Walnut selection native to the Puget Sound region (northwestern United States, near Seattle)
• Habit: Fairly broad and rounded, well branched
• Mature height: 8 to 12 m
• Width: 6 to 10 m
• Growth: Medium to fast
• Special features: Very hardy, suited to regions with cold winters and cool springs; produces good-sized, very tasty nuts.

🌰 Fruit

• Size: Medium to large
• Shell: Moderately thick, fairly smooth, easy to crack
• Nut: Blonde, well-filled, sweet and rich flavor
• Kernel yield: 50 to 55%
• Flavor: Very good, slightly sweet and buttery
• Harvest period: October (late)
• Storage: Excellent—several months in a dry, cool place

🌼 Flowering

• Flowering month: April to May (medium to late)
• Type: Monoecious (male catkins and female flowers on the same tree)
• Male and female flowering: Generally well synchronized (protogynous variety—female before male)
• Sensitivity: Flowers tolerate cold better than those of earlier varieties

🌾 Pollination

• Type: Partially self-fertile, but better fruiting with a pollinator
• Good pollinators: ‘Cascade’, ‘Fernor’, ‘Franquette’ or ‘Fernette’
• Compatibility: Good with ‘Cascade’ (similar flowering windows)
• Flowering: Medium to late

🌱 Cultivation and care

• Exposure: Full sun, open location
• Soil: Deep, fertile, well-drained—prefers loamy-clay soils rich in humus
• pH: Neutral to slightly alkaline
• Watering: Useful for the first 2–3 years, then unnecessary except in severe drought
• Pruning: Not necessary — remove dead wood and poorly oriented branches
• Fertilization: Compost or decomposed manure in the fall every 2–3 years

🧊 Hardiness

• USDA hardiness zone: 4 to 8
• Minimum temperature tolerance: Down to -30°C 🌨️
  👉 Excellent cold resistance: one of the hardiest Juglans regia walnut trees.

🌿 Resistance and health

• Disease resistance: Good, but like all walnut trees, susceptible to:
  • Bacterial blight (Xanthomonas arboricola)
  • Anthracnose (Gnomonia leptostyla)
• Prevention: Bordeaux mixture at bud break and in fall, good aeration of the canopy

💡 Advantages

✅ Very hardy (withstands harsh winters)
✅ Nuts with remarkable taste
✅ Good compatibility with other varieties (including ‘Cascade’)
✅ Suitable for cool or mountainous regions

⚠️ Points to consider

⚠️ Late variety: avoid in areas with very short autumns (risk of incomplete harvest)
⚠️ Slightly late bud break: advantage against frost, but slightly later production