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How to Grow Jonkheer van Tets

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Jonkheer van Tets

Ribes rubrum 'Jonkheer van Tets'

shrub

Jonkheer van Tets is a red currant cultivar prized for its early season production and large, bright red berries in compact clusters. This vigorous, upright shrub produces abundant fruit and is one of the most popular red currant varieties for home and commercial cultivation. Known for excellent flavor and reliable yields, it's an heirloom variety dating back to the mid-20th century.

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Example Jonkheer van Tets timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Jonkheer van Tets

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Jonkheer van Tets

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Jonkheer van Tets dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily for optimal fruit production
💧
Water: Consistent moisture during growing season; 1-1.5 inches per week. Reduce watering after harvest. Avoid waterlogging.
📏
Spacing: 48 inches
📅
Days to maturity: 2-3 years to first substantial harvest; fully productive by year 3-4
🌱
Planting depth: Plant bare-root or container plants at same depth as in nursery; crown should be at soil level

Soil

Type: Well-draining loamy soil rich in organic matter
pH: 6.0-6.8
Amendments:
Compost peat moss aged manure mulch for moisture retention

Growing Zones

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Thrives in zones 3-8, with best performance in zones 4-7

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

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Growth Stages

1

Establishment (Year 1)

12 months

Young shrub focuses on root development and vegetative growth. Produces limited flowers and fruit.

Water regularly, maintain consistent moisture. Remove flowers in first year to encourage plant vigor. Provide stakes or supports if needed.

2

Vegetative Growth (Year 1-2)

Variable, through year 2

Upright branching structure develops. Leaves are bright green and lobed. Plant grows 12-18 inches per year.

Prune to develop open, vase-shaped form with 8-12 main branches. Remove crossing or weak canes. Apply balanced fertilizer in spring.

3

Flowering (Spring, Year 2+)

3-4 weeks

Small, inconspicuous greenish-white flowers appear in drooping clusters (racemes) along branches in April-May.

Do not prune during flowering. Ensure adequate pollination (self-fertile but benefits from pollinator activity). Maintain consistent moisture.

4

Fruiting & Maturation (Early Summer, Year 2+)

4-6 weeks

Bright red berries develop in long, elegant strands. Berries grow from small green to full red color by late June-early July. Each berry is translucent and firm.

Monitor for pests and diseases. Maintain adequate water during fruit development. Do not over-fertilize with nitrogen (reduces fruiting). Thin berries if overcrowded for larger individual fruit.

5

Harvest & Post-Harvest (July-August)

Variable, spans 4-8 weeks

Berries reach full sweetness and color. Fruit stores well on plant for 2-3 weeks. Foliage remains healthy throughout season.

Pick clusters when fully red and slightly soft. Water-in after harvest to support new growth. Prune spent canes after fruiting. Begin preparing for next season's dormancy.

Companion Planting

Plan your garden →

Plant with:

Gooseberries black currants raspberry blueberry chives garlic borage

Avoid planting near:

White pine Scots pine eastern white pine (currants are alternate hosts for white pine blister rust in some regions) Ribes species with white pine disease risk in restricted areas

Common Pests

  • Spray with insecticidal soap or neem oil in early spring; remove infested shoots if severe

  • Hand-pick larvae from undersides of leaves; spray spinosad if heavy infestation; prune affected foliage

  • Increase humidity, spray with water to dislodge; use miticide if severe; neem oil can help

  • Remove and destroy infested berries; maintain sanitation; use yellow sticky traps

  • Spray with insecticidal soap; encourage beneficial insects; reflective mulches can deter

Uses

🍳

Fresh eating and desserts

Culinary

Jonkheer van Tets berries have a balanced sweet-tart flavor excellent for fresh eating straight from the plant. They are also perfect for tarts, pavlovas, and elegant dessert garnishes. [source]

🍳

Jams, jellies, and preserves

Culinary

The high pectin content of red currants makes them ideal for making clear, jewel-toned jellies and jams, often mixed with other fruits. Jonkheer van Tets produces abundant fruit for processing. [source]

💊

Vitamin C and antioxidant source

Medicinal

Red currants are rich in vitamin C, anthocyanins, and other antioxidants that support immune function and overall health. Eating fresh berries or consuming fresh juice provides nutritional benefits. [source]

🍳

Sauce and condiment base

Culinary

Red currant jelly and sauces complement meat dishes, cheese boards, and savory applications. The natural tartness provides balance to rich foods. [source]

🦋

Pollinator and bird food

Wildlife

The flowers attract bees and other pollinators, while ripe berries provide food for birds and wildlife. Growing Jonkheer van Tets supports local ecosystem health. [source]

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

Harvest Tips

Harvest in late June to early July when berries are fully red, slightly soft, and sweet. Pick entire strands by holding the cluster and stripping berries off with your fingers, or cut clusters with pruners. Berries can stay on plant for 2-3 weeks at peak ripeness without quality loss. For processing (jams, jellies), harvest when slightly firm. Fresh eating berries should be fully ripe and tender.

Fun Facts

  • 🌱 Jonkheer van Tets was bred in the Netherlands and is named after the Dutch nobleman and horticulturist J.C. van Tets, who was instrumental in currant breeding programs in the early 20th century.
  • 🌱 Red currants were a favorite fruit of European royalty and nobility, often appearing in formal gardens and on aristocratic tables since the 16th century.
  • 🌱 A single mature Jonkheer van Tets shrub can produce 8-12 pounds of berries in a season, making it one of the most productive red currant varieties.

Gardening Terms

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

Cultivar Full Sun Heirloom Pollination
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