How to Grow Cambridge Scarlet
Wikimedia Commons
Cambridge Scarlet
Fragaria × ananassa 'Cambridge Scarlet'
fruitCambridge Scarlet is a classic June-bearing strawberry variety developed in Cambridge, England in the 1930s. It produces bright red, medium-sized berries with excellent flavor and is renowned for its reliability and disease resistance. This heirloom variety remains popular among home gardeners for its productive harvests and outstanding taste.
When should you plant Cambridge Scarlet in your zone?
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Example Cambridge Scarlet timeline · Pittsburgh, PA (Zone 6b)
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Plant Cambridge Scarlet
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 Cambridge Scarlet
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Cambridge Scarlet dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8, hardy in colder climates
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Establishment
Spring through fall (8-10 weeks)Young plants with 3-5 leaves developing root systems. Growth is slow as energy goes underground.
Remove flower buds first year to encourage root and plant development. Keep soil consistently moist. Mulch lightly to retain moisture and regulate temperature.
Vegetative Growth
Late fall through spring (6 months)Plants develop runners (stolons) with new plantlets. Crown expands and produces more leaf growth.
Allow runners to root in soil or pin down with clips to create new plants. Maintain weed-free beds. Apply balanced fertilizer in early spring and after harvest.
Flowering
Late spring (3-4 weeks)White flowers with yellow centers emerge in clusters above the foliage. Multiple flower buds develop on each plant.
Ensure adequate water and nutrients. Protect flowers from late frost with row covers if needed. Allow pollinating insects access; avoid pesticides during bloom.
Fruiting & Harvest
Early summer (3-4 weeks of peak harvest)Small green berries develop rapidly and enlarge. Berries transition from white to pink to bright red over 3-4 weeks.
Maintain consistent watering during fruit development. Mulch around plants to keep berries clean and prevent soil contact. Monitor for pest and disease issues. Harvest ripe berries every 2-3 days.
Post-Harvest & Renewal
Mid-summer through fall (3-4 months)Flower production stops; plants redirect energy to runners and foliage. Dead leaves and spent flowering stems remain.
Remove old foliage after harvest to prevent disease. Apply mulch for winter protection in colder zones. Thin runners and renovate beds every 2-3 years by removing old crowns.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with neem oil or insecticidal soap; encourage beneficial insects like ladybugs; reflective mulches can deter
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Increase humidity with regular misting; spray with water to dislodge; neem oil for severe infestations
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Hand-pick in early morning or evening; create barriers with copper tape or diatomaceous earth; remove leaf litter
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Remove affected leaves; apply spinosad if damage is severe; encourage parasitic wasps
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Improve air circulation; remove infected berries immediately; avoid wetting foliage; apply sulfur if needed
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Ensure good air circulation; sulfur or potassium bicarbonate sprays; remove heavily infected leaves
Uses
Fresh eating and desserts
CulinaryCambridge Scarlet berries are exceptional for eating fresh due to their rich, sweet flavor and firm texture. Excellent in tarts, cakes, jams, and preserves. [source]
Jam and preserves
CulinaryHigh pectin content and flavor make this variety ideal for making homemade jams, jellies, and preserves with excellent set. [source]
Vitamin C and antioxidants
MedicinalStrawberries are rich in vitamin C, ellagic acid, and anthocyanins, supporting immune function and heart health. Traditional use for blood sugar regulation. [source]
Pollinator and beneficial insect support
WildlifeThe white flowers attract bees and other pollinators in spring, providing early-season forage for native insects. [source]
Natural dye and cosmetics
HouseholdStrawberry juice can be used as a natural stain or in homemade face masks due to salicylic acid content and skin-brightening properties. [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 berries when fully red (usually June for June-bearing varieties in most regions). Pick in early morning when berries are coolest and firmest. Gently twist or cut the stem leaving green cap intact. Ripe berries come off easily with minimal pressure. Use within 1-2 days for fresh eating, or refrigerate up to 5 days. Peak harvest period is 3-4 weeks; pick every 2-3 days to encourage continued production.
Fun Facts
- 🌱 Cambridge Scarlet was developed by Cambridge University's John Innes Horticultural Institution and released in 1934; it became one of the most widely grown strawberry varieties in the world during the mid-20th century.
- 🌱 This variety is a June-bearing type, producing one main crop flush in early summer, making it ideal for traditional jam-making season and reliable harvests.
- 🌱 Cambridge Scarlet is notably disease-resistant, especially to red core root disease and leaf diseases, which contributed to its popularity and longevity as a garden variety over 90 years.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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