How to Grow Exbury Kermesina Rose

Wikimedia Commons

Exbury Kermesina Rose

Rosa × kermesina var. exbury

shrub

Exbury Kermesina is a hybrid shrub rose known for its stunning deep crimson-red flowers with a velvety texture and rich fragrance. This vigorous, disease-resistant rose produces abundant blooms throughout the growing season and grows into a full, rounded shrub. It is highly valued for ornamental gardens, cutting, and landscape use.

When should you plant Exbury Kermesina Rose 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.

Get my Exbury Kermesina Rose timeline →

Example Exbury Kermesina Rose timeline · Pittsburgh, PA (Zone 6b)

Plant Exbury Kermesina Rose
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Exbury Kermesina Rose
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Exbury Kermesina Rose dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily; tolerates light afternoon shade in hot climates

💧

Water: Water deeply 1-2 times per week at soil level, providing 1-1.5 inches per week. Keep soil consistently moist but never waterlogged. Water in early morning to reduce fungal disease risk.

📏

Spacing: 24 inches

📅

Days to maturity: 90-120 days from planting to significant flowering; full maturity in 2-3 years

🌱

Planting depth: Plant bare-root roses with graft union 1-2 inches below soil surface in cold climates, at or slightly above in warm climates. Container roses at same depth as nursery pot.

Soil

Type: Well-draining loamy soil enriched with organic matter

pH: 6.0-6.5

Amendments:

Compost or well-rotted manure Peat moss or coconut coir Bone meal for phosphorus Perlite or coarse sand for drainage

Growing Zones

Find your zone →

Thrives in USDA zones 5b-9a; prefers cooler to moderate climates

5b 6a 6b 7a 7b 8a 8b 9a

Get my Exbury Kermesina Rose timeline →

Growth Stages

Establishment

4-6 weeks

New planted rose develops roots and sends up initial shoots. Foliage is tender and growth is modest.

Water regularly but gently. Avoid heavy pruning. Remove any early flower buds to encourage root establishment. Mulch well to retain moisture and regulate soil temperature.

Vegetative Growth

6-8 weeks

Rose produces vigorous new canes and healthy green foliage. Plant fills out and develops its characteristic rounded form.

Maintain consistent watering and feeding with balanced fertilizer every 4-6 weeks. Prune only to remove diseased or dead wood. Monitor for pests and diseases.

Flowering

8-12 weeks (repeats throughout season)

Deep crimson-red double flowers with velvety petals emerge on strong stems. Flowers are fragrant and bloom in clusters or individually depending on pruning.

Deadhead spent blooms regularly to encourage continuous flowering. Water at soil level to keep petals dry. Feed every 4 weeks with rose fertilizer or balanced 10-10-10.

Peak Blooming & Maintenance

12+ weeks through fall

Rose reaches full flowering potential with abundant crimson blooms. Shrub is fully established and self-sustaining with proper care.

Continue deadheading and fertilizing. Monitor closely for rose rosette virus, powdery mildew, and black spot. Adjust watering during heat waves or drought.

Winter Dormancy

8-12 weeks (climate dependent)

Rose enters rest period, foliage may drop or remain sparse. Growth slows dramatically in cold climates.

In zones 5-6, mound soil or mulch 10-12 inches high around base for winter protection. Reduce watering significantly. Prune in late winter/early spring as new growth emerges. No feeding needed.

Companion Planting

Plan your garden →

Plant with:

Lavender Catmint Boxwood Salvia Geranium Alliums Russian sage Clematis

Avoid planting near:

Walnuts (juglone toxicity) Highly competitive shrubs that crowd roots Plants requiring frequent overhead watering

Common Pests

Hand-pick early morning when beetles are sluggish; use pheromone traps away from rose; apply neem oil or insecticidal soap; encourage natural predators
Spray with strong water stream; apply insecticidal soap or neem oil; introduce ladybugs; use reflective mulches
Increase humidity and mist foliage; apply sulfur dust or miticide; use neem oil spray; remove heavily infested leaves
Prune and remove infested leaves immediately; apply spinosad or insecticidal soap; encourage parasitic wasps
Ensure good air circulation; avoid overhead watering; apply sulfur dust or fungicide; remove infected leaves; prune out dense growth
Remove infected leaves promptly; apply fungicide (sulfur, copper, or rose-specific); water at soil level only; improve air flow; avoid wetting foliage
No cure; remove infected plant entirely and destroy; control rose rosette eriophyid mite vector with miticide; plant resistant varieties

Uses

🌿

Cut flowers and floral arrangements

Ornamental

The deep crimson, velvety double blooms with rich fragrance make Exbury Kermesina an excellent choice for fresh flower arrangements, special occasions, and garden cutting. Flowers last 7-10 days in a vase. [source]

🍳

Rose petals and rose water

Culinary

Pesticide-free petals can be used fresh in salads, crystallized as garnish, or dried for herbal infusions. Rose water made from the petals is used in baking, beverages, and Middle Eastern cuisine. [source]

💊

Traditional herbal remedy

Medicinal

Rose petals and hips contain vitamin C and antioxidants. Traditionally used in herbal teas to support respiratory health, digestion, and as a mild astringent for skin care. [source]

🎨

Dried flowers and potpourri

Craft

Petals can be dried for long-lasting potpourri, craft projects, and decorative use. The deep crimson color holds well when air-dried, making it ideal for pressed flower arrangements. [source]

🦋

Pollinator and beneficial insect support

Wildlife

The abundant flowers attract bees, butterflies, and other pollinators. Healthy rose shrubs support biodiversity in the garden and help establish a thriving ecosystem. [source]

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

Harvest Tips

Cut blooms in early morning when stems are fully hydrated, choosing flowers that are just beginning to open. Cut stems at a 45-degree angle with sharp pruners, removing leaves that would sit below waterline in vase. For longer vase life, recut stems daily and change water every 2 days. Remove lower foliage to prevent bacterial growth. Deadhead faded flowers throughout the blooming season by cutting just above a 5-leaflet leaf to encourage more blooms.

Fun Facts

🌱 Exbury Kermesina roses are named after Exbury, a famous 250-acre garden estate in Hampshire, England, renowned for breeding exceptional ornamental plants and roses.
🌱 The 'kermesina' heritage refers to 'kermes red,' a deep crimson dye historically derived from insect pigments—the rose's color was deemed worthy of this prestigious name.
🌱 This rose variety is notably disease-resistant compared to many heirloom roses, making it a favorite for organic gardeners and those seeking low-maintenance landscape specimens.

Gardening Terms

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

Deadhead Full Sun Hybrid Mulch

Shop Exbury Kermesina Rose plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Exbury Kermesina Rose planting timeline

Tell us your zip code and we'll calculate exactly when to start Exbury Kermesina Rose 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 Exbury Kermesina Rose timeline →