How to Grow Asparagus 'Waltham'
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Asparagus 'Waltham'
Asparagus officinalis 'Waltham'
vegetableWaltham asparagus is a hybrid cultivar bred for improved vigor, disease resistance, and productivity. This cold-hardy variety produces thick, tender green spears and is particularly well-suited to northeastern and cooler climates. It establishes productive beds that can produce for 15-20+ years.
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Example Asparagus 'Waltham' timeline · Pittsburgh, PA (Zone 6b)
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Plant Asparagus 'Waltham'
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 Asparagus 'Waltham'
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, particularly valuable in cooler climates (zones 3-5)
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Get my Asparagus 'Waltham' timeline →Growth Stages
Establishment (Year 1)
Full growing season (spring through fall)Feathery foliage develops from dormant crowns; no spear harvest. Plants focus on root and crown development.
Do not harvest any spears. Water regularly, maintain weed-free beds, apply 2-3 inches of mulch. Fertilize lightly with balanced fertilizer in early summer.
Light Production (Year 2)
Spring (6-8 weeks harvest window), summer-fall (foliage growth)Spears emerge in spring; foliage develops as plants mature. Light harvest possible but plants still building reserves.
Harvest for only 2-3 weeks in early spring, then stop to allow ferning and crown strengthening. Remove female (berried) plants to prevent seedlings. Apply 1 inch compost annually.
Full Production (Year 3+)
Spring (8-10 weeks of active harvest), summer-fall (foliage and senescence)Abundant thick green spears emerge in spring. Established crowns produce prolifically for decades.
Harvest for 8-10 weeks in spring when spears reach 6-8 inches. Cut at soil level with sharp knife. Keep beds mulched and weed-free. Apply 1-2 inches compost annually.
Summer/Fall Growth
June through October/first frostAfter spring harvest ends, feathery fern-like foliage grows 3-5 feet tall. Plants manufacture sugars for next year's spear production.
Allow foliage to grow uninterrupted. Continue watering during drought. Fertilize with low-nitrogen fertilizer in July. Cut back dead foliage in fall after frost.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Handpick beetles and eggs in early morning. Remove debris and dead foliage where beetles overwinter. Use neem oil or spinosad if infestation is severe. Encourage parasitic wasps.
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Similar to asparagus beetle control. Remove damaged spears promptly. Cut back foliage early in fall to disrupt life cycle.
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Select resistant varieties like Waltham. Ensure good air circulation by proper spacing. Remove infected foliage promptly. Avoid overhead watering. Apply sulfur if fungal issues develop.
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Plant only in well-draining soil. Avoid planting in areas with poor drainage. Remove and destroy infected plants. Practice crop rotation (do not replant asparagus in same spot for 5+ years).
Uses
Fresh Cooking & Eating
CulinaryWaltham spears are prized for their thick, tender texture and sweet, nutty flavor. They are excellent steamed, grilled, roasted, or added to pasta, risotto, and stir-fries. [source]
Diuretic & Anti-inflammatory Properties
MedicinalAsparagus has been used traditionally in herbal medicine for its diuretic properties and may help reduce inflammation. It contains glutathione, an antioxidant compound. [source]
Preservation & Storage
HouseholdFresh Waltham spears can be blanched and frozen for year-round use, or canned. They store 3-5 days refrigerated in a damp towel. [source]
Beneficial Insect Support
WildlifeAsparagus fern foliage and flowers provide habitat and nectar for beneficial insects, parasitic wasps, and pollinators that help control garden pests. [source]
Fern Fronds (Decorative)
CulinaryThe feathery foliage (fern fronds) can be harvested and dried for long-lasting floral arrangements and dried flower crafts. [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 year 3 when crowns are established. In spring (April-June in northern zones), cut spears at soil level with a sharp knife when they reach 6-8 inches tall and tips are tight. Harvest every 2-3 days during peak season. Stop harvesting 8-10 weeks after start to allow plants to replenish. Waltham's thick spears snap cleanly and are excellent for fresh use and cooking.
Fun Facts
- 🌱 Waltham asparagus was developed by the USDA at the Waltham Field Station in Massachusetts specifically for northeastern growing conditions and cold hardiness.
- 🌱 A single asparagus plant can produce for 15-20+ years once established, making it one of the longest-producing perennial vegetables in the garden.
- 🌱 Asparagus was cultivated by ancient Greeks and Romans and was even mentioned in the oldest surviving cookbook, attributed to the Roman author Apicius.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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