How to Grow Rosemary 'Clarke'
Rosemary 'Clarke'
Rosmarinus officinalis 'Clarke'
herbRosemary 'Clarke' is a compact, upright cultivar of common rosemary known for its densely-branched growth habit and aromatic needle-like foliage. This Mediterranean native is a woody perennial shrub prized for both culinary and ornamental use, producing delicate blue, pink, or occasionally white flowers. It's hardier than many rosemary varieties and works well in containers or garden beds.
When should you plant Rosemary 'Clarke' 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 Rosemary 'Clarke' timeline · Pittsburgh, PA (Zone 6b)
-
Plant Rosemary 'Clarke'
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Rosemary 'Clarke'
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Rosemary 'Clarke' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 8-11, with winter protection possible in zone 7
Sign up free to see if Rosemary 'Clarke' grows in your zone — and get a personalized planting timeline.
Get my Rosemary 'Clarke' timeline →Growth Stages
Seedling
3-4 weeksTiny seedlings with needle-like cotyledons and first true leaves emerging; fragile and slow-growing.
Keep soil lightly moist but not waterlogged. Provide bright light and good air circulation. Germination is slow (2-4 weeks). Consider bottom heat (70°F) to speed germination.
Vegetative Growth
6-12 weeksPlant develops multiple stems and dense branching. Needle-like foliage becomes more prominent; plant grows upright and compact.
Pinch back growing tips to encourage bushier growth. Reduce watering as plant matures. Begin light fertilizing monthly with balanced or low-nitrogen fertilizer.
Flowering
4-8 weeks; may bloom sporadically year-round in warm zonesSmall, dainty flowers appear along stem tips, typically blue but can be pink or white. Flowers bloom in whorls.
Continue moderate watering. Deadheading extends blooming but is optional. Flowers are edible and attract pollinators.
Established Shrub
2+ years of productivityPlant reaches mature size (2-3 feet tall and wide for 'Clarke'). Dense, woody structure with extensive branching.
Prune lightly after flowering or in spring to maintain shape. Reduce watering significantly—drought-tolerant. Minimal fertilizing needed.
Winter Dormancy
3-4 months (varies by zone)In cooler zones, growth slows. Plant may appear less vigorous but retains foliage and remains semi-evergreen.
Reduce watering to minimal levels. Provide frost protection in zones 7-8 with mulch or row covers. Avoid pruning before frost.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water to dislodge; use insecticidal soap or neem oil if severe. Improve air circulation.
-
Yellow sticky traps, insecticidal soap, or neem oil. Remove heavily infested leaves.
-
Hand-pick beetles and larvae. Prune infested growth. Insecticidal soap or spinosad as needed.
-
Improve air circulation. Spray with sulfur or potassium bicarbonate. Avoid overhead watering.
-
Ensure excellent drainage. Allow soil to dry between waterings. Remove affected plants if widespread.
Uses
Cooking & Flavoring
CulinaryFresh or dried rosemary leaves are a staple in Mediterranean cooking. Use in roasted meats, vegetables, breads, olive oil infusions, and herbal teas. [source]
Herbal Tea & Wellness
MedicinalRosemary tea has been used traditionally to improve circulation, support memory, and aid digestion. Contains antioxidants including carnosic acid. [source]
Aromatherapy & Essential Oil
HouseholdRosemary essential oil is used in diffusers and perfumery for its stimulating, invigorating scent. Often used in hair and skincare products. [source]
Ornamental & Dried Crafts
CraftThe compact 'Clarke' cultivar is excellent as a potted houseplant or garden focal point. Dried sprigs add texture to wreaths and floral arrangements. [source]
Pollinator Support
WildlifeDelicate flowers attract bees, butterflies, and other pollinators, making it a valuable addition to wildlife gardens. [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 sprigs year-round once plant is established (at least 6 months old). Pinch off 4-6 inches of new growth from stem tips. Harvest in the morning after dew dries for best flavor. Never remove more than one-third of the plant at once. For fresh use, pick as needed; for drying, harvest just before flowering when essential oil content peaks.
Fun Facts
- 🌱 Rosemary's name comes from Latin 'ros marinus' meaning 'dew of the sea,' reflecting its native Mediterranean coastal habitat.
- 🌱 In medieval times, rosemary was believed to strengthen memory and was carried by students during exams—a tradition some still follow today.
- 🌱 The 'Clarke' cultivar is notably more compact and cold-hardy than the species, making it ideal for container growing and cooler garden zones.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Rosemary 'Clarke' planting timeline
Tell us your zip code and we'll calculate exactly when to start Rosemary 'Clarke' 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 Rosemary 'Clarke' timeline →