How to Grow Wallonne
Wikimedia Commons
Wallonne
Solanum lycopersicum 'Wallonne'
vegetableWallonne is a heirloom beefsteak tomato variety originating from Belgium, known for its large, deeply ribbed fruits with rich, complex flavor. The plants are indeterminate, producing fruits throughout the season until frost. This variety is prized by gardeners for its disease resistance and exceptional taste.
When should you plant Wallonne 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.
Example Wallonne timeline · Pittsburgh, PA (Zone 6b)
-
Plant Wallonne
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Wallonne
Around Jul 1≈ 75 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Wallonne dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 5-9; can be grown in zones 3-4 with season extension
Sign up free to see if Wallonne grows in your zone — and get a personalized planting timeline.
Get my Wallonne timeline →Growth Stages
Seedling
6-8 weeks indoors before transplantingTiny plants with 2-4 true leaves, pale green, delicate
Keep soil moist but not wet. Provide strong light (grow lights 2-3 inches above seedlings for 14-16 hours daily). Maintain 65-75°F. Harden off before transplanting.
Vegetative/Establishment
3-4 weeks after transplantingRobust plants with dense foliage, growing rapidly after transplanting in the garden
Install stakes or cages early to support indeterminate growth. Mulch 2-3 inches around base. Fertilize every 2-3 weeks with balanced fertilizer. Remove lower leaves as plant grows.
Flowering
4-6 weeks, with flowers appearing continuouslySmall yellow flowers appear in clusters (inflorescences); vigorous vine growth continues
Maintain consistent water and nutrient levels. Once flowering begins, shift to lower-nitrogen fertilizer (higher phosphorus/potassium). Prune suckers on indeterminate varieties to direct energy to fruit production.
Fruiting
4-6 weeks until first fruits colorGreen fruits develop rapidly on the vine; plants may reach 6-8 feet tall or taller
Continue consistent watering. Provide strong support as fruits become heavy. Prune excess foliage only to allow ripening sunlight to reach fruits. Monitor for pests and diseases.
Harvest
8-12+ weeks of production until frostFruits ripen from green to deep red, becoming very large (10-16 oz) with ribbed appearance
Harvest when fully colored and slightly soft at the blossom end. Fruits can be picked at breaker stage (color just beginning to show) and ripened indoors. Cut (don't pull) to avoid damaging vine. Continue harvesting until frost.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Handpick; encourage parasitic wasps; use Bacillus thuringiensis (Bt) spray if infestation is heavy
-
Spray with strong water stream; insecticidal soap; neem oil; encourage beneficial insects
-
Maintain humidity; spray with water; neem oil; miticide if severe
-
Yellow sticky traps; insecticidal soap; neem oil; reflective mulch
-
Remove affected lower leaves; improve air circulation; mulch to prevent soil splash; fungicide (copper or sulfur) if severe
-
Improve air circulation; avoid overhead watering; remove affected plants; fungicide (chlorothalonil, mancozeb, or copper) preventatively in humid conditions
Uses
Fresh eating and classic tomato dishes
CulinaryWallonne's large, meaty fruits with few seeds are ideal for slicing fresh, making sandwiches, or cooking down for sauces, soups, and stews. The complex, rich flavor (with some acidity balance) makes it one of the finest heirloom tomatoes for gourmet cooking. [source]
Canning and preserving
CulinaryThe dense flesh and high solids content make Wallonne excellent for making tomato paste, sauce, and canned whole or crushed tomatoes. Its meaty structure holds up well during long cooking. [source]
Home gardening heirloom preservation
HouseholdWallonne is prized by seed savers and heritage gardeners for maintaining this Belgian heirloom variety. Saving seeds from open-pollinated plants ensures the variety survives for future seasons. [source]
Nutritional and antioxidant benefits
MedicinalLike all tomatoes, Wallonne is rich in lycopene, a powerful antioxidant linked to heart health and cancer prevention. Ripe, deeply colored tomatoes contain the highest concentrations of beneficial compounds. [source]
Pollinator support
WildlifeThe abundant yellow flowers attract bees and other pollinators, supporting garden biodiversity while ensuring good fruit set. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Wallonne fruits mature 75-85 days after transplant. Harvest when fully colored and slightly soft at the stem end; the fruit should give slightly to gentle pressure. Fruits can be harvested at the breaker stage (first blush of color) and ripened indoors at room temperature for 5-7 days. Use sharp shears or a knife to cut fruits rather than pulling to avoid vine damage. Continue harvesting regularly to encourage ongoing production. Near season end (before frost), pick all green fruits and ripen them indoors.
Fun Facts
- 🌱 Wallonne is a true heirloom variety from Belgium with a heritage dating back several generations, representing genetic diversity lost in modern commercial tomato breeding.
- 🌱 The deeply ribbed, almost wrinkled appearance of Wallonne fruits is called 'pleated' or 'oxheart' ribbing—a sign of the fruit's heirloom genetics and complex flavor development.
- 🌱 Indeterminate varieties like Wallonne can reach 8-10 feet tall or more and produce fruit continuously until frost, making a single plant capable of yielding 100+ pounds of tomatoes over a season.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Wallonne planting timeline
Tell us your zip code and we'll calculate exactly when to start Wallonne 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 Wallonne timeline →