How to Grow Madeleine Hill Rosemary
Madeleine Hill Rosemary
Rosmarinus officinalis 'Madeleine Hill'
herbMadeleine Hill is a cold-hardy rosemary cultivar named after the legendary Texas herb grower. It features narrow, aromatic gray-green leaves and produces delicate flowers in shades of blue, purple, pink, or white. This variety is prized for exceptional winter hardiness compared to standard rosemary, making it suitable for colder climates.
When should you plant Madeleine Hill Rosemary in your zone?
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Example Madeleine Hill Rosemary timeline · Pittsburgh, PA (Zone 6b)
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Plant Madeleine Hill Rosemary
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 Madeleine Hill Rosemary
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Madeleine Hill Rosemary dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 6-10; exceptionally hardy for zone 6, surviving temperatures to -10°F
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Seedling
4-6 weeksTiny seedlings with first true leaves appearing; slow growth phase.
Keep soil moist but not wet; provide bright light; use well-draining seed-starting mix. Germination is slow (14-21 days) and sporadic.
Juvenile
8-12 weeksYoung plants developing woody stems and characteristic narrow leaves; reaching 6-12 inches tall.
Begin hardening off seedlings gradually. Transition to larger pots with well-draining soil mix. Reduce watering frequency as plants mature.
Establishment
3-6 monthsPlant developing stronger root system and branching; reaching 12-24 inches in first year.
Pinch back growing tips to encourage bushier growth. Minimal fertilizer needed. Water only when soil is dry 1-2 inches deep.
Flowering
6-12 months (blooms most heavily spring-summer, can flower year-round in warm zones)Mature plant producing tubular flowers along stems; blooms range from blue to purple to pink or white depending on conditions.
Flowers attract pollinators. Continue minimal watering. Can begin light harvesting while flowering.
Mature Perennial
Years 2+ (lifespan 15-20+ years)Fully established shrub, 2-4 feet tall and wide; producing abundant harvestable foliage throughout year.
Prune annually after flowering to maintain shape and promote new growth. Avoid heavy pruning of woody stems. Minimal water; negligible fertilizer.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use neem oil if severe. Improve air circulation; avoid overhead watering.
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Ensure good air circulation. Remove affected foliage. Sulfur dust or neem oil for persistent cases. Avoid overhead watering.
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Yellow sticky traps; spray with insecticidal soap or neem oil. Most common in container plants.
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Prevent through excellent drainage and careful watering. No cure for established rot; remove plant and improve soil drainage.
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Hand-remove or spray with horticultural oil. More common in containers than in-ground.
Uses
Seasoning & Cooking
CulinaryFresh or dried leaves are used to flavor meats, roasted vegetables, breads, and Mediterranean dishes. The strong, piney flavor complements lamb, chicken, potatoes, and olive oil-based dishes. [source]
Herbal Infusions & Traditional Medicine
MedicinalRosemary has been traditionally used to support memory and circulation. Leaves are steeped into tea to create an herbal beverage. Contains carnosic acid and rosmarinic acid. [source]
Infused Oils & Vinegars
HouseholdSprigs are infused into olive oil or vinegar to create flavored cooking ingredients. Also used in herbal sachets and dried arrangements. [source]
Ornamental & Cut Flowers
CraftThe delicate flowers and attractive foliage make excellent additions to dried floral arrangements, wreaths, and fresh bouquets. [source]
Pollinator Support
WildlifeFlowers attract bees, butterflies, and other pollinators, making it a valuable plant for ecological gardens and pollinator corridors. [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 light harvesting once plant is 6-8 inches tall and established (3-4 months). Pinch off growing tips and upper stems; never remove more than 1/3 of plant at once. Harvest year-round in warm climates. Ideal harvest is in morning after dew dries but before hot sun. Cut just above leaf nodes to encourage branching. Flavor is best during flowering season.
Fun Facts
- 🌱 Madeleine Hill was a legendary Texas herb grower and gardener who developed and popularized this cold-hardy rosemary cultivar through decades of cultivation and selection.
- 🌱 Rosemary is one of the few herbs that becomes more flavorful when dried, as drying concentrates the essential oils that give it its distinctive piney aroma.
- 🌱 This cultivar can survive winters in zone 6 where standard rosemary typically fails, making it one of the hardiest rosemary varieties available for northern gardeners.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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